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Editorial Team
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Asked: 2026-06-02T17:39:18+00:00

I’d like to select columns and join tables where the join condition concatenates the

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I’d like to select columns and join tables where the join condition concatenates the selected columns in additions to dots. For e.g.

SELECT TBL1.ID,
TBL1.COUNTRY As A,
TBL1.STATE As B,
TBL1.CODE As C
FROM TBL1, TBL2
WHERE TBL2.ID = A+'.'+B+'.'+C

The data is so that TBL2.ID looks like ‘US.NY.61‘ where US is TBL1.COUNTRY, NY is TBL1.STATE, etc.

UPDATE: SQl fiddle: http://sqlfiddle.com/#!3/26b6b/4

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1 Answer

  1. Editorial Team

    How about trying something like this

    SELECT TBL1.ID,
TBL1.COUNTRY As A,
TBL1.STATE As B,
TBL1.CODE As C
FROM TBL1 
  INNER JOIN TBL2 ON CAST(TBL1.COUNTRY AS varchar(20)) + '.' + CAST(TBL1.STATE AS varchar(20)) + '.' + CAST(TBL1.CODE AS varchar(20)) = CAST(TBL2.ID AS varchar(20))

    Added code to cast the 4 fields as varchar before combining and comparing them.

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