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 Append new text to a column
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Aged Yak Warrior

808 Posts

Posted - 10/02/2012 :  11:04:42  Show Profile  Reply with Quote

I have a need to append a text string into a column of nvarchar.
Something like next:

Update my_table
set my_Col = select my_col from my_table where id = 123 + "new text"
where id = 123

But I don't think I get the syntax right.

Also, this code is called from app side. Is there a way to not select the existing value to save a round trip?


Flowing Fount of Yak Knowledge

5155 Posts

Posted - 10/02/2012 :  11:15:15  Show Profile  Reply with Quote
The correct syntax would be this:
Update my_table 
set my_Col = my_col + 'new text'
where id = 123
It has no "SELECT", so there is no roundtrip.

If there is nothing in my_col (i.e., if it is null), for it to work correctly, you also need to do one more thing, see below:
Update my_table 
set my_Col = COALESCE(my_col,'') + 'new text'
where id = 123
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Very Important crosS Applying yaK Herder

52326 Posts

Posted - 10/02/2012 :  11:35:35  Show Profile  Reply with Quote
also make sure my_Col has sufficient length to hold the new appended string as well

SQL Server MVP

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Aged Yak Warrior

808 Posts

Posted - 10/02/2012 :  11:41:41  Show Profile  Reply with Quote
THANKS! You guys are awesome!
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