Exercise 13

Exercise 13: Defining constraints on your data (Preparations)


Make sure you have the Movie database, which contains 174 nodes and 257 relationships.

This is what you should see when you click the database icon:

AfterExercise12

If your database does not have this number of nodes and relationships, you can use the script below to reset it:

MATCH (n) DETACH DELETE n;
CREATE (TheMatrix:Movie {title:'The Matrix', released:1999, tagline:'Welcome to the Real World'})
CREATE (Keanu:Person {name:'Keanu Reeves', born:1964})
CREATE (Carrie:Person {name:'Carrie-Anne Moss', born:1967})
CREATE (Laurence:Person {name:'Laurence Fishburne', born:1961})
CREATE (Hugo:Person {name:'Hugo Weaving', born:1960})
CREATE (LillyW:Person {name:'Lilly Wachowski', born:1967})
CREATE (LanaW:Person {name:'Lana Wachowski', born:1965})
CREATE (JoelS:Person {name:'Joel Silver', born:1952})
CREATE
  (Keanu)-[:ACTED_IN {roles:['Neo']}]->(TheMatrix),
  (Carrie)-[:ACTED_IN {roles:['Trinity']}]->(TheMatrix),
  (Laurence)-[:ACTED_IN {roles:['Morpheus']}]->(TheMatrix),
  (Hugo)-[:ACTED_IN {roles:['Agent Smith']}]->(TheMatrix),
  (LillyW)-[:DIRECTED]->(TheMatrix),
  (LanaW)-[:DIRECTED]->(TheMatrix),
  (JoelS)-[:PRODUCED]->(TheMatrix)

CREATE (Emil:Person {name:"Emil Eifrem", born:1978})
CREATE (Emil)-[:ACTED_IN {roles:["Emil"]}]->(TheMatrix)

CREATE (TheMatrixReloaded:Movie {title:'The Matrix Reloaded', released:2003, tagline:'Free your mind'})
CREATE
  (Keanu)-[:ACTED_IN {roles:['Neo']}]->(TheMatrixReloaded),
  (Carrie)-[:ACTED_IN {roles:['Trinity']}]->(TheMatrixReloaded),
  (Laurence)-[:ACTED_IN {roles:['Morpheus']}]->(TheMatrixReloaded),
  (Hugo)-[:ACTED_IN {roles:['Agent Smith']}]->(TheMatrixReloaded),
  (LillyW)-[:DIRECTED]->(TheMatrixReloaded),
  (LanaW)-[:DIRECTED]->(TheMatrixReloaded),
  (JoelS)-[:PRODUCED]->(TheMatrixReloaded)

CREATE (TheMatrixRevolutions:Movie {title:'The Matrix Revolutions', released:2003, tagline:'Everything that has a beginning has an end'})
CREATE
  (Keanu)-[:ACTED_IN {roles:['Neo']}]->(TheMatrixRevolutions),
  (Carrie)-[:ACTED_IN {roles:['Trinity']}]->(TheMatrixRevolutions),
  (Laurence)-[:ACTED_IN {roles:['Morpheus']}]->(TheMatrixRevolutions),
  (Hugo)-[:ACTED_IN {roles:['Agent Smith']}]->(TheMatrixRevolutions),
  (LillyW)-[:DIRECTED]->(TheMatrixRevolutions),
  (LanaW)-[:DIRECTED]->(TheMatrixRevolutions),
  (JoelS)-[:PRODUCED]->(TheMatrixRevolutions)

CREATE (TheDevilsAdvocate:Movie {title:"The Devil's Advocate", released:1997, tagline:'Evil has its winning ways'})
CREATE (Charlize:Person {name:'Charlize Theron', born:1975})
CREATE (Al:Person {name:'Al Pacino', born:1940})
CREATE (Taylor:Person {name:'Taylor Hackford', born:1944})
CREATE
  (Keanu)-[:ACTED_IN {roles:['Kevin Lomax']}]->(TheDevilsAdvocate),
  (Charlize)-[:ACTED_IN {roles:['Mary Ann Lomax']}]->(TheDevilsAdvocate),
  (Al)-[:ACTED_IN {roles:['John Milton']}]->(TheDevilsAdvocate),
  (Taylor)-[:DIRECTED]->(TheDevilsAdvocate)

CREATE (AFewGoodMen:Movie {title:"A Few Good Men", released:1992, tagline:"In the heart of the nation's capital, in a courthouse of the U.S. government, one man will stop at nothing to keep his honor, and one will stop at nothing to find the truth."})
CREATE (TomC:Person {name:'Tom Cruise', born:1962})
CREATE (JackN:Person {name:'Jack Nicholson', born:1937})
CREATE (DemiM:Person {name:'Demi Moore', born:1962})
CREATE (KevinB:Person {name:'Kevin Bacon', born:1958})
CREATE (KieferS:Person {name:'Kiefer Sutherland', born:1966})
CREATE (NoahW:Person {name:'Noah Wyle', born:1971})
CREATE (CubaG:Person {name:'Cuba Gooding Jr.', born:1968})
CREATE (KevinP:Person {name:'Kevin Pollak', born:1957})
CREATE (JTW:Person {name:'J.T. Walsh', born:1943})
CREATE (JamesM:Person {name:'James Marshall', born:1967})
CREATE (ChristopherG:Person {name:'Christopher Guest', born:1948})
CREATE (RobR:Person {name:'Rob Reiner', born:1947})
CREATE (AaronS:Person {name:'Aaron Sorkin', born:1961})
CREATE
  (TomC)-[:ACTED_IN {roles:['Lt. Daniel Kaffee']}]->(AFewGoodMen),
  (JackN)-[:ACTED_IN {roles:['Col. Nathan R. Jessup']}]->(AFewGoodMen),
  (DemiM)-[:ACTED_IN {roles:['Lt. Cdr. JoAnne Galloway']}]->(AFewGoodMen),
  (KevinB)-[:ACTED_IN {roles:['Capt. Jack Ross']}]->(AFewGoodMen),
  (KieferS)-[:ACTED_IN {roles:['Lt. Jonathan Kendrick']}]->(AFewGoodMen),
  (NoahW)-[:ACTED_IN {roles:['Cpl. Jeffrey Barnes']}]->(AFewGoodMen),
  (CubaG)-[:ACTED_IN {roles:['Cpl. Carl Hammaker']}]->(AFewGoodMen),
  (KevinP)-[:ACTED_IN {roles:['Lt. Sam Weinberg']}]->(AFewGoodMen),
  (JTW)-[:ACTED_IN {roles:['Lt. Col. Matthew Andrew Markinson']}]->(AFewGoodMen),
  (JamesM)-[:ACTED_IN {roles:['Pfc. Louden Downey']}]->(AFewGoodMen),
  (ChristopherG)-[:ACTED_IN {roles:['Dr. Stone']}]->(AFewGoodMen),
  (AaronS)-[:ACTED_IN {roles:['Man in Bar']}]->(AFewGoodMen),
  (RobR)-[:DIRECTED]->(AFewGoodMen),
  (AaronS)-[:WROTE]->(AFewGoodMen)

CREATE (TopGun:Movie {title:"Top Gun", released:1986, tagline:'I feel the need, the need for speed.'})
CREATE (KellyM:Person {name:'Kelly McGillis', born:1957})
CREATE (ValK:Person {name:'Val Kilmer', born:1959})
CREATE (AnthonyE:Person {name:'Anthony Edwards', born:1962})
CREATE (TomS:Person {name:'Tom Skerritt', born:1933})
CREATE (MegR:Person {name:'Meg Ryan', born:1961})
CREATE (TonyS:Person {name:'Tony Scott', born:1944})
CREATE (JimC:Person {name:'Jim Cash', born:1941})
CREATE
  (TomC)-[:ACTED_IN {roles:['Maverick']}]->(TopGun),
  (KellyM)-[:ACTED_IN {roles:['Charlie']}]->(TopGun),
  (ValK)-[:ACTED_IN {roles:['Iceman']}]->(TopGun),
  (AnthonyE)-[:ACTED_IN {roles:['Goose']}]->(TopGun),
  (TomS)-[:ACTED_IN {roles:['Viper']}]->(TopGun),
  (MegR)-[:ACTED_IN {roles:['Carole']}]->(TopGun),
  (TonyS)-[:DIRECTED]->(TopGun),
  (JimC)-[:WROTE]->(TopGun)

CREATE (JerryMaguire:Movie {title:'Jerry Maguire', released:2000, tagline:'The rest of his life begins now.'})
CREATE (ReneeZ:Person {name:'Renee Zellweger', born:1969})
CREATE (KellyP:Person {name:'Kelly Preston', born:1962})
CREATE (JerryO:Person {name:"Jerry O'Connell", born:1974})
CREATE (JayM:Person {name:'Jay Mohr', born:1970})
CREATE (BonnieH:Person {name:'Bonnie Hunt', born:1961})
CREATE (ReginaK:Person {name:'Regina King', born:1971})
CREATE (JonathanL:Person {name:'Jonathan Lipnicki', born:1996})
CREATE (CameronC:Person {name:'Cameron Crowe', born:1957})
CREATE
  (TomC)-[:ACTED_IN {roles:['Jerry Maguire']}]->(JerryMaguire),
  (CubaG)-[:ACTED_IN {roles:['Rod Tidwell']}]->(JerryMaguire),
  (ReneeZ)-[:ACTED_IN {roles:['Dorothy Boyd']}]->(JerryMaguire),
  (KellyP)-[:ACTED_IN {roles:['Avery Bishop']}]->(JerryMaguire),
  (JerryO)-[:ACTED_IN {roles:['Frank Cushman']}]->(JerryMaguire),
  (JayM)-[:ACTED_IN {roles:['Bob Sugar']}]->(JerryMaguire),
  (BonnieH)-[:ACTED_IN {roles:['Laurel Boyd']}]->(JerryMaguire),
  (ReginaK)-[:ACTED_IN {roles:['Marcee Tidwell']}]->(JerryMaguire),
  (JonathanL)-[:ACTED_IN {roles:['Ray Boyd']}]->(JerryMaguire),
  (CameronC)-[:DIRECTED]->(JerryMaguire),
  (CameronC)-[:PRODUCED]->(JerryMaguire),
  (CameronC)-[:WROTE]->(JerryMaguire)

CREATE (StandByMe:Movie {title:"Stand By Me", released:1986, tagline:"For some, it's the last real taste of innocence, and the first real taste of life. But for everyone, it's the time that memories are made of."})
CREATE (RiverP:Person {name:'River Phoenix', born:1970})
CREATE (CoreyF:Person {name:'Corey Feldman', born:1971})
CREATE (WilW:Person {name:'Wil Wheaton', born:1972})
CREATE (JohnC:Person {name:'John Cusack', born:1966})
CREATE (MarshallB:Person {name:'Marshall Bell', born:1942})
CREATE
  (WilW)-[:ACTED_IN {roles:['Gordie Lachance']}]->(StandByMe),
  (RiverP)-[:ACTED_IN {roles:['Chris Chambers']}]->(StandByMe),
  (JerryO)-[:ACTED_IN {roles:['Vern Tessio']}]->(StandByMe),
  (CoreyF)-[:ACTED_IN {roles:['Teddy Duchamp']}]->(StandByMe),
  (JohnC)-[:ACTED_IN {roles:['Denny Lachance']}]->(StandByMe),
  (KieferS)-[:ACTED_IN {roles:['Ace Merrill']}]->(StandByMe),
  (MarshallB)-[:ACTED_IN {roles:['Mr. Lachance']}]->(StandByMe),
  (RobR)-[:DIRECTED]->(StandByMe)

CREATE (AsGoodAsItGets:Movie {title:'As Good as It Gets', released:1997, tagline:'A comedy from the heart that goes for the throat.'})
CREATE (HelenH:Person {name:'Helen Hunt', born:1963})
CREATE (GregK:Person {name:'Greg Kinnear', born:1963})
CREATE (JamesB:Person {name:'James L. Brooks', born:1940})
CREATE
  (JackN)-[:ACTED_IN {roles:['Melvin Udall']}]->(AsGoodAsItGets),
  (HelenH)-[:ACTED_IN {roles:['Carol Connelly']}]->(AsGoodAsItGets),
  (GregK)-[:ACTED_IN {roles:['Simon Bishop']}]->(AsGoodAsItGets),
  (CubaG)-[:ACTED_IN {roles:['Frank Sachs']}]->(AsGoodAsItGets),
  (JamesB)-[:DIRECTED]->(AsGoodAsItGets)

CREATE (WhatDreamsMayCome:Movie {title:'What Dreams May Come', released:1998, tagline:'After life there is more. The end is just the beginning.'})
CREATE (AnnabellaS:Person {name:'Annabella Sciorra', born:1960})
CREATE (MaxS:Person {name:'Max von Sydow', born:1929})
CREATE (WernerH:Person {name:'Werner Herzog', born:1942})
CREATE (Robin:Person {name:'Robin Williams', born:1951})
CREATE (VincentW:Person {name:'Vincent Ward', born:1956})
CREATE
  (Robin)-[:ACTED_IN {roles:['Chris Nielsen']}]->(WhatDreamsMayCome),
  (CubaG)-[:ACTED_IN {roles:['Albert Lewis']}]->(WhatDreamsMayCome),
  (AnnabellaS)-[:ACTED_IN {roles:['Annie Collins-Nielsen']}]->(WhatDreamsMayCome),
  (MaxS)-[:ACTED_IN {roles:['The Tracker']}]->(WhatDreamsMayCome),
  (WernerH)-[:ACTED_IN {roles:['The Face']}]->(WhatDreamsMayCome),
  (VincentW)-[:DIRECTED]->(WhatDreamsMayCome)

CREATE (SnowFallingonCedars:Movie {title:'Snow Falling on Cedars', released:1999, tagline:'First loves last. Forever.'})
CREATE (EthanH:Person {name:'Ethan Hawke', born:1970})
CREATE (RickY:Person {name:'Rick Yune', born:1971})
CREATE (JamesC:Person {name:'James Cromwell', born:1940})
CREATE (ScottH:Person {name:'Scott Hicks', born:1953})
CREATE
  (EthanH)-[:ACTED_IN {roles:['Ishmael Chambers']}]->(SnowFallingonCedars),
  (RickY)-[:ACTED_IN {roles:['Kazuo Miyamoto']}]->(SnowFallingonCedars),
  (MaxS)-[:ACTED_IN {roles:['Nels Gudmundsson']}]->(SnowFallingonCedars),
  (JamesC)-[:ACTED_IN {roles:['Judge Fielding']}]->(SnowFallingonCedars),
  (ScottH)-[:DIRECTED]->(SnowFallingonCedars)

CREATE (YouveGotMail:Movie {title:"You've Got Mail", released:1998, tagline:'At odds in life... in love on-line.'})
CREATE (ParkerP:Person {name:'Parker Posey', born:1968})
CREATE (DaveC:Person {name:'Dave Chappelle', born:1973})
CREATE (SteveZ:Person {name:'Steve Zahn', born:1967})
CREATE (TomH:Person {name:'Tom Hanks', born:1956})
CREATE (NoraE:Person {name:'Nora Ephron', born:1941})
CREATE
  (TomH)-[:ACTED_IN {roles:['Joe Fox']}]->(YouveGotMail),
  (MegR)-[:ACTED_IN {roles:['Kathleen Kelly']}]->(YouveGotMail),
  (GregK)-[:ACTED_IN {roles:['Frank Navasky']}]->(YouveGotMail),
  (ParkerP)-[:ACTED_IN {roles:['Patricia Eden']}]->(YouveGotMail),
  (DaveC)-[:ACTED_IN {roles:['Kevin Jackson']}]->(YouveGotMail),
  (SteveZ)-[:ACTED_IN {roles:['George Pappas']}]->(YouveGotMail),
  (NoraE)-[:DIRECTED]->(YouveGotMail)

CREATE (SleeplessInSeattle:Movie {title:'Sleepless in Seattle', released:1993, tagline:'What if someone you never met, someone you never saw, someone you never knew was the only someone for you?'})
CREATE (RitaW:Person {name:'Rita Wilson', born:1956})
CREATE (BillPull:Person {name:'Bill Pullman', born:1953})
CREATE (VictorG:Person {name:'Victor Garber', born:1949})
CREATE (RosieO:Person {name:"Rosie O'Donnell", born:1962})
CREATE
  (TomH)-[:ACTED_IN {roles:['Sam Baldwin']}]->(SleeplessInSeattle),
  (MegR)-[:ACTED_IN {roles:['Annie Reed']}]->(SleeplessInSeattle),
  (RitaW)-[:ACTED_IN {roles:['Suzy']}]->(SleeplessInSeattle),
  (BillPull)-[:ACTED_IN {roles:['Walter']}]->(SleeplessInSeattle),
  (VictorG)-[:ACTED_IN {roles:['Greg']}]->(SleeplessInSeattle),
  (RosieO)-[:ACTED_IN {roles:['Becky']}]->(SleeplessInSeattle),
  (NoraE)-[:DIRECTED]->(SleeplessInSeattle)

CREATE (JoeVersustheVolcano:Movie {title:'Joe Versus the Volcano', released:1990, tagline:'A story of love, lava and burning desire.'})
CREATE (JohnS:Person {name:'John Patrick Stanley', born:1950})
CREATE (Nathan:Person {name:'Nathan Lane', born:1956})
CREATE
  (TomH)-[:ACTED_IN {roles:['Joe Banks']}]->(JoeVersustheVolcano),
  (MegR)-[:ACTED_IN {roles:['DeDe', 'Angelica Graynamore', 'Patricia Graynamore']}]->(JoeVersustheVolcano),
  (Nathan)-[:ACTED_IN {roles:['Baw']}]->(JoeVersustheVolcano),
  (JohnS)-[:DIRECTED]->(JoeVersustheVolcano)

CREATE (WhenHarryMetSally:Movie {title:'When Harry Met Sally', released:1998, tagline:'At odds in life... in love on-line.'})
CREATE (BillyC:Person {name:'Billy Crystal', born:1948})
CREATE (CarrieF:Person {name:'Carrie Fisher', born:1956})
CREATE (BrunoK:Person {name:'Bruno Kirby', born:1949})
CREATE
  (BillyC)-[:ACTED_IN {roles:['Harry Burns']}]->(WhenHarryMetSally),
  (MegR)-[:ACTED_IN {roles:['Sally Albright']}]->(WhenHarryMetSally),
  (CarrieF)-[:ACTED_IN {roles:['Marie']}]->(WhenHarryMetSally),
  (BrunoK)-[:ACTED_IN {roles:['Jess']}]->(WhenHarryMetSally),
  (RobR)-[:DIRECTED]->(WhenHarryMetSally),
  (RobR)-[:PRODUCED]->(WhenHarryMetSally),
  (NoraE)-[:PRODUCED]->(WhenHarryMetSally),
  (NoraE)-[:WROTE]->(WhenHarryMetSally)

CREATE (ThatThingYouDo:Movie {title:'That Thing You Do', released:1996, tagline:'In every life there comes a time when that thing you dream becomes that thing you do'})
CREATE (LivT:Person {name:'Liv Tyler', born:1977})
CREATE
  (TomH)-[:ACTED_IN {roles:['Mr. White']}]->(ThatThingYouDo),
  (LivT)-[:ACTED_IN {roles:['Faye Dolan']}]->(ThatThingYouDo),
  (Charlize)-[:ACTED_IN {roles:['Tina']}]->(ThatThingYouDo),
  (TomH)-[:DIRECTED]->(ThatThingYouDo)

CREATE (TheReplacements:Movie {title:'The Replacements', released:2000, tagline:'Pain heals, Chicks dig scars... Glory lasts forever'})
CREATE (Brooke:Person {name:'Brooke Langton', born:1970})
CREATE (Gene:Person {name:'Gene Hackman', born:1930})
CREATE (Orlando:Person {name:'Orlando Jones', born:1968})
CREATE (Howard:Person {name:'Howard Deutch', born:1950})
CREATE
  (Keanu)-[:ACTED_IN {roles:['Shane Falco']}]->(TheReplacements),
  (Brooke)-[:ACTED_IN {roles:['Annabelle Farrell']}]->(TheReplacements),
  (Gene)-[:ACTED_IN {roles:['Jimmy McGinty']}]->(TheReplacements),
  (Orlando)-[:ACTED_IN {roles:['Clifford Franklin']}]->(TheReplacements),
  (Howard)-[:DIRECTED]->(TheReplacements)

CREATE (RescueDawn:Movie {title:'RescueDawn', released:2006, tagline:"Based on the extraordinary true story of one man's fight for freedom"})
CREATE (ChristianB:Person {name:'Christian Bale', born:1974})
CREATE (ZachG:Person {name:'Zach Grenier', born:1954})
CREATE
  (MarshallB)-[:ACTED_IN {roles:['Admiral']}]->(RescueDawn),
  (ChristianB)-[:ACTED_IN {roles:['Dieter Dengler']}]->(RescueDawn),
  (ZachG)-[:ACTED_IN {roles:['Squad Leader']}]->(RescueDawn),
  (SteveZ)-[:ACTED_IN {roles:['Duane']}]->(RescueDawn),
  (WernerH)-[:DIRECTED]->(RescueDawn)

CREATE (TheBirdcage:Movie {title:'The Birdcage', released:1996, tagline:'Come as you are'})
CREATE (MikeN:Person {name:'Mike Nichols', born:1931})
CREATE
  (Robin)-[:ACTED_IN {roles:['Armand Goldman']}]->(TheBirdcage),
  (Nathan)-[:ACTED_IN {roles:['Albert Goldman']}]->(TheBirdcage),
  (Gene)-[:ACTED_IN {roles:['Sen. Kevin Keeley']}]->(TheBirdcage),
  (MikeN)-[:DIRECTED]->(TheBirdcage)

CREATE (Unforgiven:Movie {title:'Unforgiven', released:1992, tagline:"It's a hell of a thing, killing a man"})
CREATE (RichardH:Person {name:'Richard Harris', born:1930})
CREATE (ClintE:Person {name:'Clint Eastwood', born:1930})
CREATE
  (RichardH)-[:ACTED_IN {roles:['English Bob']}]->(Unforgiven),
  (ClintE)-[:ACTED_IN {roles:['Bill Munny']}]->(Unforgiven),
  (Gene)-[:ACTED_IN {roles:['Little Bill Daggett']}]->(Unforgiven),
  (ClintE)-[:DIRECTED]->(Unforgiven)

CREATE (JohnnyMnemonic:Movie {title:'Johnny Mnemonic', released:1995, tagline:'The hottest data on earth. In the coolest head in town'})
CREATE (Takeshi:Person {name:'Takeshi Kitano', born:1947})
CREATE (Dina:Person {name:'Dina Meyer', born:1968})
CREATE (IceT:Person {name:'Ice-T', born:1958})
CREATE (RobertL:Person {name:'Robert Longo', born:1953})
CREATE
  (Keanu)-[:ACTED_IN {roles:['Johnny Mnemonic']}]->(JohnnyMnemonic),
  (Takeshi)-[:ACTED_IN {roles:['Takahashi']}]->(JohnnyMnemonic),
  (Dina)-[:ACTED_IN {roles:['Jane']}]->(JohnnyMnemonic),
  (IceT)-[:ACTED_IN {roles:['J-Bone']}]->(JohnnyMnemonic),
  (RobertL)-[:DIRECTED]->(JohnnyMnemonic)

CREATE (CloudAtlas:Movie {title:'Cloud Atlas', released:2012, tagline:'Everything is connected'})
CREATE (HalleB:Person {name:'Halle Berry', born:1966})
CREATE (JimB:Person {name:'Jim Broadbent', born:1949})
CREATE (TomT:Person {name:'Tom Tykwer', born:1965})
CREATE (DavidMitchell:Person {name:'David Mitchell', born:1969})
CREATE (StefanArndt:Person {name:'Stefan Arndt', born:1961})
CREATE
  (TomH)-[:ACTED_IN {roles:['Zachry', 'Dr. Henry Goose', 'Isaac Sachs', 'Dermot Hoggins']}]->(CloudAtlas),
  (Hugo)-[:ACTED_IN {roles:['Bill Smoke', 'Haskell Moore', 'Tadeusz Kesselring', 'Nurse Noakes', 'Boardman Mephi', 'Old Georgie']}]->(CloudAtlas),
  (HalleB)-[:ACTED_IN {roles:['Luisa Rey', 'Jocasta Ayrs', 'Ovid', 'Meronym']}]->(CloudAtlas),
  (JimB)-[:ACTED_IN {roles:['Vyvyan Ayrs', 'Captain Molyneux', 'Timothy Cavendish']}]->(CloudAtlas),
  (TomT)-[:DIRECTED]->(CloudAtlas),
  (LillyW)-[:DIRECTED]->(CloudAtlas),
  (LanaW)-[:DIRECTED]->(CloudAtlas),
  (DavidMitchell)-[:WROTE]->(CloudAtlas),
  (StefanArndt)-[:PRODUCED]->(CloudAtlas)

CREATE (TheDaVinciCode:Movie {title:'The Da Vinci Code', released:2006, tagline:'Break The Codes'})
CREATE (IanM:Person {name:'Ian McKellen', born:1939})
CREATE (AudreyT:Person {name:'Audrey Tautou', born:1976})
CREATE (PaulB:Person {name:'Paul Bettany', born:1971})
CREATE (RonH:Person {name:'Ron Howard', born:1954})
CREATE
  (TomH)-[:ACTED_IN {roles:['Dr. Robert Langdon']}]->(TheDaVinciCode),
  (IanM)-[:ACTED_IN {roles:['Sir Leight Teabing']}]->(TheDaVinciCode),
  (AudreyT)-[:ACTED_IN {roles:['Sophie Neveu']}]->(TheDaVinciCode),
  (PaulB)-[:ACTED_IN {roles:['Silas']}]->(TheDaVinciCode),
  (RonH)-[:DIRECTED]->(TheDaVinciCode)

CREATE (VforVendetta:Movie {title:'V for Vendetta', released:2006, tagline:'Freedom! Forever!'})
CREATE (NatalieP:Person {name:'Natalie Portman', born:1981})
CREATE (StephenR:Person {name:'Stephen Rea', born:1946})
CREATE (JohnH:Person {name:'John Hurt', born:1940})
CREATE (BenM:Person {name: 'Ben Miles', born:1967})
CREATE
  (Hugo)-[:ACTED_IN {roles:['V']}]->(VforVendetta),
  (NatalieP)-[:ACTED_IN {roles:['Evey Hammond']}]->(VforVendetta),
  (StephenR)-[:ACTED_IN {roles:['Eric Finch']}]->(VforVendetta),
  (JohnH)-[:ACTED_IN {roles:['High Chancellor Adam Sutler']}]->(VforVendetta),
  (BenM)-[:ACTED_IN {roles:['Dascomb']}]->(VforVendetta),
  (JamesM)-[:DIRECTED]->(VforVendetta),
  (LillyW)-[:PRODUCED]->(VforVendetta),
  (LanaW)-[:PRODUCED]->(VforVendetta),
  (JoelS)-[:PRODUCED]->(VforVendetta),
  (LillyW)-[:WROTE]->(VforVendetta),
  (LanaW)-[:WROTE]->(VforVendetta)

CREATE (SpeedRacer:Movie {title:'Speed Racer', released:2008, tagline:'Speed has no limits'})
CREATE (EmileH:Person {name:'Emile Hirsch', born:1985})
CREATE (JohnG:Person {name:'John Goodman', born:1960})
CREATE (SusanS:Person {name:'Susan Sarandon', born:1946})
CREATE (MatthewF:Person {name:'Matthew Fox', born:1966})
CREATE (ChristinaR:Person {name:'Christina Ricci', born:1980})
CREATE (Rain:Person {name:'Rain', born:1982})
CREATE
  (EmileH)-[:ACTED_IN {roles:['Speed Racer']}]->(SpeedRacer),
  (JohnG)-[:ACTED_IN {roles:['Pops']}]->(SpeedRacer),
  (SusanS)-[:ACTED_IN {roles:['Mom']}]->(SpeedRacer),
  (MatthewF)-[:ACTED_IN {roles:['Racer X']}]->(SpeedRacer),
  (ChristinaR)-[:ACTED_IN {roles:['Trixie']}]->(SpeedRacer),
  (Rain)-[:ACTED_IN {roles:['Taejo Togokahn']}]->(SpeedRacer),
  (BenM)-[:ACTED_IN {roles:['Cass Jones']}]->(SpeedRacer),
  (LillyW)-[:DIRECTED]->(SpeedRacer),
  (LanaW)-[:DIRECTED]->(SpeedRacer),
  (LillyW)-[:WROTE]->(SpeedRacer),
  (LanaW)-[:WROTE]->(SpeedRacer),
  (JoelS)-[:PRODUCED]->(SpeedRacer)

CREATE (NinjaAssassin:Movie {title:'Ninja Assassin', released:2009, tagline:'Prepare to enter a secret world of assassins'})
CREATE (NaomieH:Person {name:'Naomie Harris'})
CREATE
  (Rain)-[:ACTED_IN {roles:['Raizo']}]->(NinjaAssassin),
  (NaomieH)-[:ACTED_IN {roles:['Mika Coretti']}]->(NinjaAssassin),
  (RickY)-[:ACTED_IN {roles:['Takeshi']}]->(NinjaAssassin),
  (BenM)-[:ACTED_IN {roles:['Ryan Maslow']}]->(NinjaAssassin),
  (JamesM)-[:DIRECTED]->(NinjaAssassin),
  (LillyW)-[:PRODUCED]->(NinjaAssassin),
  (LanaW)-[:PRODUCED]->(NinjaAssassin),
  (JoelS)-[:PRODUCED]->(NinjaAssassin)

CREATE (TheGreenMile:Movie {title:'The Green Mile', released:1999, tagline:"Walk a mile you'll never forget."})
CREATE (MichaelD:Person {name:'Michael Clarke Duncan', born:1957})
CREATE (DavidM:Person {name:'David Morse', born:1953})
CREATE (SamR:Person {name:'Sam Rockwell', born:1968})
CREATE (GaryS:Person {name:'Gary Sinise', born:1955})
CREATE (PatriciaC:Person {name:'Patricia Clarkson', born:1959})
CREATE (FrankD:Person {name:'Frank Darabont', born:1959})
CREATE
  (TomH)-[:ACTED_IN {roles:['Paul Edgecomb']}]->(TheGreenMile),
  (MichaelD)-[:ACTED_IN {roles:['John Coffey']}]->(TheGreenMile),
  (DavidM)-[:ACTED_IN {roles:['Brutus "Brutal" Howell']}]->(TheGreenMile),
  (BonnieH)-[:ACTED_IN {roles:['Jan Edgecomb']}]->(TheGreenMile),
  (JamesC)-[:ACTED_IN {roles:['Warden Hal Moores']}]->(TheGreenMile),
  (SamR)-[:ACTED_IN {roles:['"Wild Bill" Wharton']}]->(TheGreenMile),
  (GaryS)-[:ACTED_IN {roles:['Burt Hammersmith']}]->(TheGreenMile),
  (PatriciaC)-[:ACTED_IN {roles:['Melinda Moores']}]->(TheGreenMile),
  (FrankD)-[:DIRECTED]->(TheGreenMile)

CREATE (FrostNixon:Movie {title:'Frost/Nixon', released:2008, tagline:'400 million people were waiting for the truth.'})
CREATE (FrankL:Person {name:'Frank Langella', born:1938})
CREATE (MichaelS:Person {name:'Michael Sheen', born:1969})
CREATE (OliverP:Person {name:'Oliver Platt', born:1960})
CREATE
  (FrankL)-[:ACTED_IN {roles:['Richard Nixon']}]->(FrostNixon),
  (MichaelS)-[:ACTED_IN {roles:['David Frost']}]->(FrostNixon),
  (KevinB)-[:ACTED_IN {roles:['Jack Brennan']}]->(FrostNixon),
  (OliverP)-[:ACTED_IN {roles:['Bob Zelnick']}]->(FrostNixon),
  (SamR)-[:ACTED_IN {roles:['James Reston, Jr.']}]->(FrostNixon),
  (RonH)-[:DIRECTED]->(FrostNixon)

CREATE (Hoffa:Movie {title:'Hoffa', released:1992, tagline:"He didn't want law. He wanted justice."})
CREATE (DannyD:Person {name:'Danny DeVito', born:1944})
CREATE (JohnR:Person {name:'John C. Reilly', born:1965})
CREATE
  (JackN)-[:ACTED_IN {roles:['Hoffa']}]->(Hoffa),
  (DannyD)-[:ACTED_IN {roles:['Robert "Bobby" Ciaro']}]->(Hoffa),
  (JTW)-[:ACTED_IN {roles:['Frank Fitzsimmons']}]->(Hoffa),
  (JohnR)-[:ACTED_IN {roles:['Peter "Pete" Connelly']}]->(Hoffa),
  (DannyD)-[:DIRECTED]->(Hoffa)

CREATE (Apollo13:Movie {title:'Apollo 13', released:1995, tagline:'Houston, we have a problem.'})
CREATE (EdH:Person {name:'Ed Harris', born:1950})
CREATE (BillPax:Person {name:'Bill Paxton', born:1955})
CREATE
  (TomH)-[:ACTED_IN {roles:['Jim Lovell']}]->(Apollo13),
  (KevinB)-[:ACTED_IN {roles:['Jack Swigert']}]->(Apollo13),
  (EdH)-[:ACTED_IN {roles:['Gene Kranz']}]->(Apollo13),
  (BillPax)-[:ACTED_IN {roles:['Fred Haise']}]->(Apollo13),
  (GaryS)-[:ACTED_IN {roles:['Ken Mattingly']}]->(Apollo13),
  (RonH)-[:DIRECTED]->(Apollo13)

CREATE (Twister:Movie {title:'Twister', released:1996, tagline:"Don't Breathe. Don't Look Back."})
CREATE (PhilipH:Person {name:'Philip Seymour Hoffman', born:1967})
CREATE (JanB:Person {name:'Jan de Bont', born:1943})
CREATE
  (BillPax)-[:ACTED_IN {roles:['Bill Harding']}]->(Twister),
  (HelenH)-[:ACTED_IN {roles:['Dr. Jo Harding']}]->(Twister),
  (ZachG)-[:ACTED_IN {roles:['Eddie']}]->(Twister),
  (PhilipH)-[:ACTED_IN {roles:['Dustin "Dusty" Davis']}]->(Twister),
  (JanB)-[:DIRECTED]->(Twister)

CREATE (CastAway:Movie {title:'Cast Away', released:2000, tagline:'At the edge of the world, his journey begins.'})
CREATE (RobertZ:Person {name:'Robert Zemeckis', born:1951})
CREATE
  (TomH)-[:ACTED_IN {roles:['Chuck Noland']}]->(CastAway),
  (HelenH)-[:ACTED_IN {roles:['Kelly Frears']}]->(CastAway),
  (RobertZ)-[:DIRECTED]->(CastAway)

CREATE (OneFlewOvertheCuckoosNest:Movie {title:"One Flew Over the Cuckoo's Nest", released:1975, tagline:"If he's crazy, what does that make you?"})
CREATE (MilosF:Person {name:'Milos Forman', born:1932})
CREATE
  (JackN)-[:ACTED_IN {roles:['Randle McMurphy']}]->(OneFlewOvertheCuckoosNest),
  (DannyD)-[:ACTED_IN {roles:['Martini']}]->(OneFlewOvertheCuckoosNest),
  (MilosF)-[:DIRECTED]->(OneFlewOvertheCuckoosNest)

CREATE (SomethingsGottaGive:Movie {title:"Something's Gotta Give", released:2003})
CREATE (DianeK:Person {name:'Diane Keaton', born:1946})
CREATE (NancyM:Person {name:'Nancy Meyers', born:1949})
CREATE
  (JackN)-[:ACTED_IN {roles:['Harry Sanborn']}]->(SomethingsGottaGive),
  (DianeK)-[:ACTED_IN {roles:['Erica Barry']}]->(SomethingsGottaGive),
  (Keanu)-[:ACTED_IN {roles:['Julian Mercer']}]->(SomethingsGottaGive),
  (NancyM)-[:DIRECTED]->(SomethingsGottaGive),
  (NancyM)-[:PRODUCED]->(SomethingsGottaGive),
  (NancyM)-[:WROTE]->(SomethingsGottaGive)

CREATE (BicentennialMan:Movie {title:'Bicentennial Man', released:1999, tagline:"One robot's 200 year journey to become an ordinary man."})
CREATE (ChrisC:Person {name:'Chris Columbus', born:1958})
CREATE
  (Robin)-[:ACTED_IN {roles:['Andrew Marin']}]->(BicentennialMan),
  (OliverP)-[:ACTED_IN {roles:['Rupert Burns']}]->(BicentennialMan),
  (ChrisC)-[:DIRECTED]->(BicentennialMan)

CREATE (CharlieWilsonsWar:Movie {title:"Charlie Wilson's War", released:2007, tagline:"A stiff drink. A little mascara. A lot of nerve. Who said they couldn't bring down the Soviet empire."})
CREATE (JuliaR:Person {name:'Julia Roberts', born:1967})
CREATE
  (TomH)-[:ACTED_IN {roles:['Rep. Charlie Wilson']}]->(CharlieWilsonsWar),
  (JuliaR)-[:ACTED_IN {roles:['Joanne Herring']}]->(CharlieWilsonsWar),
  (PhilipH)-[:ACTED_IN {roles:['Gust Avrakotos']}]->(CharlieWilsonsWar),
  (MikeN)-[:DIRECTED]->(CharlieWilsonsWar)

CREATE (ThePolarExpress:Movie {title:'The Polar Express', released:2004, tagline:'This Holiday Season… Believe'})
CREATE
  (TomH)-[:ACTED_IN {roles:['Hero Boy', 'Father', 'Conductor', 'Hobo', 'Scrooge', 'Santa Claus']}]->(ThePolarExpress),
  (RobertZ)-[:DIRECTED]->(ThePolarExpress)

CREATE (ALeagueofTheirOwn:Movie {title:'A League of Their Own', released:1992, tagline:'Once in a lifetime you get a chance to do something different.'})
CREATE (Madonna:Person {name:'Madonna', born:1954})
CREATE (GeenaD:Person {name:'Geena Davis', born:1956})
CREATE (LoriP:Person {name:'Lori Petty', born:1963})
CREATE (PennyM:Person {name:'Penny Marshall', born:1943})
CREATE
  (TomH)-[:ACTED_IN {roles:['Jimmy Dugan']}]->(ALeagueofTheirOwn),
  (GeenaD)-[:ACTED_IN {roles:['Dottie Hinson']}]->(ALeagueofTheirOwn),
  (LoriP)-[:ACTED_IN {roles:['Kit Keller']}]->(ALeagueofTheirOwn),
  (RosieO)-[:ACTED_IN {roles:['Doris Murphy']}]->(ALeagueofTheirOwn),
  (Madonna)-[:ACTED_IN {roles:['"All the Way" Mae Mordabito']}]->(ALeagueofTheirOwn),
  (BillPax)-[:ACTED_IN {roles:['Bob Hinson']}]->(ALeagueofTheirOwn),
  (PennyM)-[:DIRECTED]->(ALeagueofTheirOwn)

CREATE (PaulBlythe:Person {name:'Paul Blythe'})
CREATE (AngelaScope:Person {name:'Angela Scope'})
CREATE (JessicaThompson:Person {name:'Jessica Thompson'})
CREATE (JamesThompson:Person {name:'James Thompson'})

CREATE
  (JamesThompson)-[:FOLLOWS]->(JessicaThompson),
  (AngelaScope)-[:FOLLOWS]->(JessicaThompson),
  (PaulBlythe)-[:FOLLOWS]->(AngelaScope)

CREATE
  (JessicaThompson)-[:REVIEWED {summary:'An amazing journey', rating:95}]->(CloudAtlas),
  (JessicaThompson)-[:REVIEWED {summary:'Silly, but fun', rating:65}]->(TheReplacements),
  (JamesThompson)-[:REVIEWED {summary:'The coolest football movie ever', rating:100}]->(TheReplacements),
  (AngelaScope)-[:REVIEWED {summary:'Pretty funny at times', rating:62}]->(TheReplacements),
  (JessicaThompson)-[:REVIEWED {summary:'Dark, but compelling', rating:85}]->(Unforgiven),
  (JessicaThompson)-[:REVIEWED {summary:"Slapstick redeemed only by the Robin Williams and Gene Hackman's stellar performances", rating:45}]->(TheBirdcage),
  (JessicaThompson)-[:REVIEWED {summary:'A solid romp', rating:68}]->(TheDaVinciCode),
  (JamesThompson)-[:REVIEWED {summary:'Fun, but a little far fetched', rating:65}]->(TheDaVinciCode),
  (JessicaThompson)-[:REVIEWED {summary:'You had me at Jerry', rating:92}]->(JerryMaguire),
  (RobinW:Person {name: 'Robin Wright', born: 1966}),
  (ForrestGump:Movie:OlderMovie {title: 'Forrest Gump', released: 1994}),
  (ForrestGumpProduction:Production {title: 'Forrest Gump', year: 1994, company: 'Paramount Pictures'}),
  (TomH)-[:ACTED_IN {roles: ['Forrest Gump']}]->(ForrestGump),
  (GaryS)-[:ACTED_IN {roles: ['Lt. Dan Taylor']}]->(ForrestGump),
  (RobinW)-[:ACTED_IN {roles: ['Jenny Curran']}]->(ForrestGump),
  (RobertZ)-[:DIRECTED]->(ForrestGump)
;
MATCH (m:Movie)
  WHERE m.released < 2010
SET m:OlderMovie

Exercise 13: Defining constraints on your data (Overview)


In this exercise you write Cypher statements to add constraints to the graph that ensure uniqueness and existence.

  • Exercise 13.1: Add a uniqueness constraint to the graph.

  • Exercise 13.2: Add an actor to the graph.

  • Exercise 13.3: Attempt to add an existence constraint to the Person nodes in the graph.

  • Exercise 13.4: Update Person nodes to have a born property.

  • Exercise 13.5: Add an existence constraint to the Person nodes in the graph.

  • Exercise 13.6: Add Sean Penn to the graph where you do not specify a value for born.

  • Exercise 13.7: Add an existence constraint to a relationship in the graph.

  • Exercise 13.8: Attempt to add a relationship that violates the constraint.

  • Exercise 13.9: Add a node key to the graph.

  • Exercise 13.10: Add the movie node to the graph.

  • Exercise 13.11: Add a similar movie node with slightly different property values.

  • Exercise 13.12: Try adding the 2018 movie again.

  • Exercise 13.13: Display the list of constraints defined in the graph.

  • Exercise 13.14: Drop an existence constraint.

Go to the next page to start this exercise.

Exercise 13.1: Add a uniqueness constraint to the graph (Instructions)


Suppose we want to ensure that every Person in the graph must have a unique name.

Add a uniqueness constraint named PersonNameUniqueConstraint to the Person nodes in the graph.

Exercise 13.1: Add a uniqueness constraint to the graph (Solution)


Add a uniqueness constraint named PersonNameUniqueConstraint to the Person nodes in the graph.

CREATE CONSTRAINT PersonNameUniqueConstraint FOR (p:Person) REQUIRE p.name IS UNIQUE

Where the result returned should be:

CreatePersonNameUnique

Exercise 13.2: Add an actor to the graph (Instructions)


Add Tom Hanks to the graph.

Exercise 13.2: Add an actor to the graph (Solution)


Add Tom Hanks to the graph.

CREATE (:Person {name: 'Tom Hanks'})

What happens when you execute the statement?

The result returned should look something like this:

CreateTomHanksFailed

Exercise 13.3: Attempt to add an existence constraint to the Person nodes in the graph (Instructions)


Suppose we want to ensure that every Person node in the graph has a born property.

Attempt to add an existence constraint named PersonBornExistsConstraint to the Person nodes in the graph.

Exercise 13.3: Attempt to add an existence constraint to the Person nodes in the graph (Solution)


Attempt to add an existence constraint named PersonBornExistsConstraint to the Person nodes in the graph.

CREATE CONSTRAINT PersonBornExistsConstraint FOR (p:Person) REQUIRE p.born IS NOT NULL

What happens when you add the constraint? This is what you should see. This is because there are Person nodes in the graph that do not have born properties set.

CreateBornExistsConstraintFailed

Exercise 13.4: Update Person nodes to have a born property (Instructions)


Update the existing Person nodes so that you set the born property to 0 for any nodes that do not exist.

Exercise 13.4: Update Person nodes to have a born property (Solution)


Update the existing Person nodes so that you set the born property to 0 for any nodes that do not exist.

MATCH (p:Person)
WHERE p.born IS NULL
SET p.born = 0

The result returned should be:

AddBornProperty

Exercise 13.5: Add an existence constraint to the Person nodes in the graph (Instructions)


Add an existence constraint named PersonBornExistsConstraint to the Person nodes in the graph.

Exercise 13.5: Add an existence constraint to the Person nodes in the graph (Solution)


Add an existence constraint named PersonBornExistsConstraint to the Person nodes in the graph.

CREATE CONSTRAINT PersonBornExistsConstraint FOR (p:Person) REQUIRE p.born IS NOT NULL

The result returned should be:

AddBornExistsConstraint

Exercise 13.6: Add Sean Penn to the graph where you do not specify a value for born (Instructions)


Add Sean Penn to the graph where you do not specify a value for born.

Exercise 13.6: Add Sean Penn to the graph where you do not specify a value for born (Solution)


Add Sean Penn to the graph where you do not specify a value for born.

CREATE (:Person {name: 'Sean Penn'})

What happens when you execute the statement? The result returned should be:

CannotAddWithoutBorn

Exercise 13.7: Add an existence constraint to a relationship in the graph (Instructions)


Suppose we want to ensure that every ACTED_IN relationship must have a value for the roles property.

Add an existence constraint, ActedInRolesExistConstraint to the ACTED_IN relationship in the graph.

Exercise 13.7: Add an existence constraint to a relationship in the graph (Solution)


Add an existence constraint, ActedInRolesExistConstraint to the ACTED_IN relationship in the graph.

CREATE CONSTRAINT ActedInRolesExistConstraint FOR ()-[r:ACTED_IN]-() REQUIRE r.roles IS NOT NULL

The result returned should be:

CreateRolesConstraintExists

Exercise 13.8: Attempt to add a relationship that violates the constraint (Instructions)


Add an ACTED_IN relationship from the person, Emil Eifrem to the movie, Forrest Gump where the roles property is not set.

Exercise 13.8: Attempt to add a relationship that violates the constraint (Solution)


Add an ACTED_IN relationship from the person, Emil Eifrem to the movie, Forrest Gump where the roles property is not set.

MATCH (p:Person), (m:Movie)
WHERE p.name = 'Emil Eifrem' AND
      m.title = 'Forrest Gump'
MERGE (p)-[:ACTED_IN]->(m)

What happens when you execute the statement? Here is what you should see:

CannotCreateActedInwithoutRoles

Exercise 13.9: Add a node key to the graph (Instructions)


Suppose we want to ensure that the graph will never contain a movie with the same title and the same year. For example, the movie studio decides to release a movie with the title, Back to the Future in 2018. There already is a movie in the graph with this title that was released in 1985. We want to allow this. To implement this type of constraint on the graph, you must add a constraint as a node key since it uses two properties of the node.

Note: If you have created a uniqueness constraint to the graph for the title property (as shown in the module content), you must first drop the constraint as it no longer makes sense if we are to allow duplicate titles in the graph. You must write and execute the statement to drop the constraint if it exists:

DROP CONSTRAINT MovieTitleConstraint

Add a node key, MovieTitleReleasedConstraint to the graph that will ensure that the combined values of title and released are unique for all Movie nodes.

Exercise 13.9: Add a node key to the graph (Solution)


Add a node key, MovieTitleReleasedConstraint to the graph that will ensure that the combined values of title and released are unique for all Movie nodes.

CREATE CONSTRAINT MovieTitleReleasedConstraint FOR (m:Movie) REQUIRE (m.title, m.released) IS NODE KEY

The result returned should be:

AddNodeKey

Exercise 13.10: Add the movie node to the graph (Instructions)


Add the movie, Back to the Future with a released value of 1985 and a tagline value of Our future..

Exercise 13.10: Add the movie node to the graph (Solution)


Add the movie, Back to the Future with a released value of 1985 and a tagline value of Our future..

CREATE (:Movie {title: 'Back to the Future', released: 1985, tagline: 'Our future.'})

The result returned should be:

AddedBackToTheFuture1985

Exercise 13.11: Add a similar movie node with slightly different property values(Instructions)


Add the movie, Back to the Future with a released value of 2018 and a tagline value of The future is ours..

Exercise 13.11: Add a similar movie node with slightly different property values (Solution)


Add the movie, Back to the Future with a released value of 2018 and a tagline value of The future is ours..

CREATE (:Movie {title: 'Back to the Future', released: 2018, tagline: 'The future is ours.'})

The result returned should be:

AddedBackToTheFuture2018

Exercise 13.12: Try adding the 2018 movie again (Instructions)


Try adding the 2018 movie again.

Exercise 13.12: Try adding the 2018 movie again (Solution)


Try adding the 2018 movie again.

CREATE (:Movie {title: 'Back to the Future', released: 2018, tagline: 'The future is ours.'})

What happens when you attempt to add the movie? The creation fails due to the node key constraint:

AddBackToFutureFailed

Exercise 13.13: Display the list of constraints defined in the graph (Instructions)


Display the list of constraints defined in the graph.

Exercise 13.13: Display the list of constraints defined in the graph (Solution)


Display the list of constraints defined in the graph.

CALL db.constraints()

The result returned should be:

listConstraints

Exercise 13.14: Drop an existence constraint (Instructions)


Drop the constraint that requires the ACTED_IN relationship to have a property, roles.

Exercise 13.14: Drop an existence constraint (Solution)


Drop the constraint that requires the ACTED_IN relationship to have a property, roles.

DROP CONSTRAINT ActedInRolesExistConstraint

The result returned should be:

dropConstraintRoles

Exercise 13: Defining constraints on your data (Summary)


In this exercise you wrote Cypher statements to add constraints to the graph that ensure uniqueness and existence. You also wrote statements to test the constraints and to remove one of them.