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You are here: Home » Blog » Datamartist Tool » Inner and outer joins SQL examples and the Join block Home Screenshots FAQ Download Pricing Customer Profile Support Support Home About Support About Blog « Estimating the cost of Business Intelligence | Tableau Public great visualization now where do we get the data? » Inner and outer joins SQL examples and the Join block Posted by James Standen on 2/10/10 • Categorized as Datamartist Tool ,ETL ,SQL Code In this post I'll show you how to do all the main types of Joins with clear SQL examples. The examples are written for Microsoft SQL Server, but very similar syntax is used in Oracle, MySQL and other databases. If you are tired of writing SQL and want to try a visual tool, you should give Datamartist a try . The diagrams with the SQL examples are actually right from the tool you just have to pick what parts of the Venn diagram you want, and the data is joined for you no code. Joins can be said to be INNER or OUTER joins, and the two tables involved are referred to as LEFT and RIGHT. By combining these two concepts you get all the various types of joins in join land: Inner, left outer, right outer, and the full outer join.

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  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 1/12

    Youarehere:HomeBlogDatamartistToolInnerandouterjoinsSQLexamplesandtheJoinblock

    HomeScreenshotsFAQDownloadPricingCustomerProfileSupport

    SupportHomeAboutSupport

    AboutBlog

    EstimatingthecostofBusinessIntelligence|TableauPublicgreatvisualizationnowwheredowegetthedata?

    InnerandouterjoinsSQLexamplesandtheJoinblockPostedbyJamesStandenon2/10/10CategorizedasDatamartistTool,ETL,SQLCode

    InthispostI'llshowyouhowtodoallthemaintypesofJoinswithclearSQLexamples.TheexamplesarewrittenforMicrosoftSQLServer,butverysimilarsyntaxisusedinOracle,MySQLandotherdatabases.

    IfyouaretiredofwritingSQLandwanttotryavisualtool,youshouldgiveDatamartistatry.ThediagramswiththeSQLexamplesareactuallyrightfromthetoolyoujusthavetopickwhatpartsoftheVenndiagramyouwant,andthedataisjoinedforyounocode.

    JoinscanbesaidtobeINNERorOUTERjoins,andthetwotablesinvolvedarereferredtoasLEFTandRIGHT.Bycombiningthesetwoconceptsyougetallthevarioustypesofjoinsinjoinland:Inner,leftouter,rightouter,andthefullouterjoin.

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 2/12

    TablesusedforSQLExamplesInthescreenshotsI'veconfiguredDatamartisttoonlyshowthenamecolumnstosavespace.TheSQLcodeshownis

    "Select*"soitwillreturnallthecolumns.YoucanseethatintheDatamartisttoolthetypeofjoinisselectedbyjustcheckingthepartsofthevenndiagramthatcontaintherowsyouwant.

    1)InnerJoinSQLExampleselect*fromdbo.StudentsSINNERJOINdbo.AdvisorsAONS.Advisor_ID=A.Advisor_ID

    2)LeftOuterJoinSQLExampleselect*from

    dbo.StudentsS

    LEFTOUTERJOIN

    dbo.AdvisorsAON

    S.Advisor_ID=A.Advisor_ID

    4)FullOuterJoinSQLExampleselect*fromdbo.StudentsSFULLOUTERJOINdbo.AdvisorsAON

    S.Advisor_ID=A.Advisor_ID

    5)SQLexampleforjustgettingtherowsthatdon'tjoin

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 3/12

    select*

    from

    dbo.StudentsS

    FULLOUTERJOIN

    dbo.AdvisorsA

    ON

    S.Advisor_ID=A.Advisor_IDwhereA.Advisor_IDisnullorS.Student_IDisnull

    6)SQL

    exampleforjustrowsfromonetablethatdon'tjoinselect*fromdbo.StudentsSFULLOUTERJOINdbo.AdvisorsAON

    S.Advisor_ID=A.Advisor_IDwhereA.Advisor_IDisnull

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 4/12

    Butwhataboutthe

    duplicaterowthing?Now,sinceinthiscasewehadasimpleonetoonerelationship,thenumberofrowsthatwerereturnedmadethevenndiagramsmakesense,andaddupprettynormallywithtableoneandtwo.

    Whathappensifthedatainthetablesarenotasimpleonetoonerelationship?WhathappensifweaddoneduplicateadvisorwiththesameID,butadifferentname?

    Ajoinwillcreatearowforeverycombinationofrowsthatjointogether.Soiftherearetwoadvisorswiththesamekey,foreverystudentrecordthathasthatkey,youwillhavetworowsintheinnerpartofthejoin.Theadvisorduplicatemakesduplicatestudent

    recordsforeverystudentwiththatadvisor.

    Youcanseehowthiscouldadduptoalotofextrarows.Thenumberofrowsistheproductofthetwosetsofjoiningrows.Ifthetablesgetbig,justafewduplicateswillcausetheresultsofajointobemuchlargerthanthetotalnumberofrowsintheinputtablesthisissomethingyouhavetowatchverycarefullywhenjoiningcheckyourrowcounts.

    Sothereyouhaveit.IfyouwanttotryjoiningtableswiththeDatamartisttoolgiveitatry.It'sasuperfastinstall,andyou'llbejoininglikeaproinnotime.

    Taggedas:DatamartistTool,Joiningdata,SQL

    EstimatingthecostofBusinessIntelligence|TableauPublicgreatvisualizationnowwheredowegetthedata?

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 5/12

    53Comments

    1. BharathiFebruary2,201211:04am

    thanksalotveryniceexampleswithclaritydata

    2. vikramj.September4,201210:35pm

    thisistheverycleareddescriptionofjoins...thanks

    3. ShaileshSeptember11,20122:34am

    thanksalotveryniceexampleswithclaritydata

    4. VinayakFebruary25,20139:10pm

    Crystalclearexplanationswithdiagrams&ex's,reallyhelpedalot.ThankYou.

    5. sam_OraMarch6,20139:32pm

    Thanks...understandablearticle.

    6. RezoanMarch31,201311:36pm

    Veryniceandcleartutorial.

    7. TonyApril6,20133:19am

    Greatarticle.ThanksalotforalltheseclearexplanationsthatmadeiteasytounderstandhowtojoinmultipletablewithSQL.

    8. B.K.Lee

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 6/12

    April17,20138:22pm

    looksveryniceandcleartutorial!!!manythanksformakingmeeasierunderstandingon"Join"!!!!Keepupgreatworks..............

    9. AtherApril19,20133:11am

    Awesome!Thanksalot!

    10. ferozkhanMay17,20138:26am

    hi,

    Whatagreatexample.Mydoubtsareclearedafterlongtime..!!!!!!!

    Thanks

    11. AjayJune18,201311:55pm

    GoodExample.

    12. kravenJune21,20131:09am

    Greatarticle!Veryclearandconcise!

    Thankyouverymuch!

    13. VineethaJuly30,20136:23am

    Theconcepthasbeenveryneatlyexplainedwithdiagramsandexampleswhichmakesitallthemoreeasiertounderstand.NiceJob!

    Thanksalot!

    14. VivekanandSinghAugust21,20135:30pm

    ThisisaverygoodwaytoclaritytheJoinconcept.

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 7/12

    Anybodycaneasilyunderstandit.Thanksalot.

    15. AdityaSeptember13,20138:26am

    ThisisthebestwebsiteIhadseenthatclearlypinpointsthedifferencebetweentheJoins.ThanksaLotforyourefforttocreatethis

    16. heemanshubhallaSeptember30,20136:12am

    *SqlIntroduction*UsingStoredProcedures*sqlqueries*groupbyfunctionsetc*Joins

    Completeexplanation

    LinkhereforSqlTutorialhttp://geeksprogrammings.blogspot.in/search/label/StructuredQueryLanguage%28SQL%29

    Linkhereforjoinsexplanationgeeksprogrammings.blogspot.in/2013/06/joinsinsql.html

    17. rahuljatOctober4,201311:58pm

    thankstoguideme...............................

    18. JashvantOctober18,201310:59pm

    GoodExample...Thanks

    19. shirinNovember9,20134:05am

    ThanksforYourHigherEducation

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 8/12

    20. MohamedElmanasrahNovember21,20131:19am

    thanksalot

    21. vijayNovember25,201310:54pm

    goodexampleswhencomparetootherwebsitesKeepitup!!!!!

    22. RajeshDecember10,201311:40pm

    Excellentexplantionwithexampleswhichhelpedmealot..

    23. MohdRiyazDecember24,20133:16am

    Veryniceexampleofjoin

    24. karaJanuary12,20147:26am

    Missingrightouterjoinexample.point3)

    25. ronFebruary11,20141:42pm

    Thanks,Niceexamples

    26. ThoaiNguyenFebruary12,201410:10am

    Thanksyouverymuch,verynicetutorial

    27. LizaFebruary26,20144:11am

    ThisalsothebesttutorialonJointhatIhaveseen.Thebestexplanationistheconceptontypesofjoin,andusingthetwotables,leftandright.

    Thanks

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 9/12

    28. YoutubeDownloaderMarch7,20146:42pm

    Thispieceofwritingistrulyaniceoneithelpsnewinternetpeople,whoarewishinginfavorofblogging.

    29. HikaruMarch14,20141:20am

    Thisarticleisoneofthebestexamplesi'veseenonthistopic.

    Thankyou!

    30. AshokMistryMarch19,20149:14am

    goodexplanation,

    31. RutulMarch21,20148:03am

    Niceexplanation

    32. GeethaMarch26,20141:27am

    WhatwillbetheoutputincasewetryRightOuterjoin?(righttablebeingAdvisors)

    33. dboyMarch26,201410:29pm

    6)SQLexampleforjustrowsfromonetablethatdon'tjoin

    select*fromdbo.StudentsSFULLOUTERJOINdbo.AdvisorsAONS.Advisor_ID=A.Advisor_IDwhereA.Advisor_IDisnull

    Ithinkthiswouidbeselect*fromdbo.StudentsSFULLOUTERJOINdbo.AdvisorsAONS.Advisor_ID=A.Advisor_IDwhereA.Advisor_Nameisnull

    34. suniltariyalMarch28,201412:33am

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 10/12

    thanksforthewonderfulimplimentationofthejoin...

    35. fornelasApril15,20149:28am

    Niceexplanationofjoins.Wishhaddonealeftouterjoinwithawhereclause.

    36. BhuvaBhaveshMay20,201411:08pm

    Thankyou

    37. AkramMay27,201411:30pm

    ThisalsothebesttutorialonJointhatIhaveseen.THANKSALOT

    38. durgeshJuly22,20147:40am

    reallybestexample

    39. sunitagawaliSeptember11,20141:37am

    It'seasytounderstandbecausegoodexample.Thankyou...............

    40. B.PeekSeptember17,20142:19pm

    Greattipsandclearlyexpressed.Iputintopracticeimmediately.

    41. ghanshyamSeptember27,20141:26am

    well....gotcompletly......

    42. saravankumarOctober25,20144:00am

    verygoodExcellentexplanation......thankyou...

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 11/12

    43. SandyNovember14,201412:41pm

    Veryeasytounderstandwithgoodexample.ThisistutorialihaveseenThanksalot..........

    44. lakkakishoreNovember19,201412:08pm

    IWON'TTOCODEFORJOINSINTABLEAU

    45. BimalNovember20,20142:27pm

    Simpleandniceexamplestomakethingsclear...thanksalotforcontribution

    46. JamesStandenNovember25,20145:19pm

    Heythere!IfyouloveTableau,butwanttogetyourdatareadybeforeyouloadit,I'lltellyouasecretwearejustabouttogooutinBetawithaversionofDatamartistthatcanwritedirectlytoTabeleauTDEfiles.ThismeansyoucanusetheDatamartistJoinfunctionality,whichisgraphicaljustpickthecolumnsandselectthepartsoftheVenndiagramyouwant,andthedatawilljointhenpumpthedatadirectlyintoTableau.Staytuned.

    47. GerryDecember7,20144:56pm

    Thanks,simple&concise,article.Helpedalot!

    48. SANKARDecember9,20144:58am

    HOWCANWEJOINSTWOTABLESINDBMSWITHOUTUSINGRDBMS.?SUBQUERIESANDJOINSANDSETOPERATORSALLCOMESUNDERRDBMS.................................

    49. TausifSayyedFebruary5,20157:20am

    excellent!!

    niceexplanationmentionhere

  • 4/2/2015 InnerandouterjoinsSQLexamplesandtheJoinblock|Datamartist.com

    http://www.datamartist.com/sqlinnerjoinleftouterjoinfullouterjoinexampleswithsyntaxforsqlserver 12/12

    Thanks..

    Trackbacks

    1. MysqlJoinsexample|dineshshrivastava2. Howto:DifferencebetweenINNERandOUTERjoins|SevenNet3. Howto:DifferencebetweenINNERandOUTERjoins|Technicalinformationforyou4. Solution:DifferencebetweenINNERandOUTERjoins#dev#it#computers|GoodAnswer

    LeaveaResponse


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