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henrikop
Constraint Violating Yak Guru
280 Posts |
 Posted - 2009-06-25 : 07:56:01
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| In a staging area I need to specify a string size when I copy data from one table to another. The source table has always NVARCHAR(100) while the destination table has variable size I use something likeUPDATE Dest SET Column1 = LEFT (source.Column1, 25) ....Would UPDATE Dest SET Column1 = CAST (source.Column1 AS NVARCHAR (25)) ....peform better or worse?Because the DB server is constantly in use I cannot proper compare test-results. Would anyone know the answer?Henri~~~~There's no place like 127.0.0.1 |
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asgast
Posting Yak Master
149 Posts |
Posted - 2009-06-25 : 08:01:59
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| CAST will require more time |
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LEFT vs CAST