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Migration to MSSQL - Concatenation in Update Statement

Posted on 2012-04-05
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Last Modified: 2012-04-10
I am migrating a database from access to MSSQL, and updating the website coding as I go. I had an update statement as follows:

UPDATE Customers SET cCredit = cCredit+"&Request.form("credit")&", cCreditNotes = '"&DATE()&"-"&Request.form("credit")&"-"&why&";"&cCreditNotes WHERE cId = "& Request.form("cust") &"

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The update of cCreditNotes is supposed to add the entered values to the beginning of the existing data for that field. However, I get the following error:

The data types varchar and nvarchar(max) are incompatible in the '&' operator.

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How can I achieve the same result as I had with Access in MSSQL?

Thank you
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Question by:stressfreewebs
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by:davidi1
davidi1 earned 2000 total points
ID: 37810414
have u tried using + instead of &?
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Accepted Solution

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stressfreewebs earned 0 total points
ID: 37810457
Hi David,

I tried +, but found it didn't work when the value in the column was null.

However, I've got around that by repeating the same statement twice, once with a where xxx is null, and once with a where xxx is not null. The null one doesn't use +, the is not null one does.

This seems to do the trick, so thanks for the pointer to using the + sign

Dan
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Author Closing Comment

by:stressfreewebs
ID: 37826737
Thanks to the pointer I was able to work a full solution
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