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The text, ntext, and image data types are invalid in this subquery or aggregate expression.

Posted on 2004-08-02
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Last Modified: 2006-11-17
SELECT MIN(Memo) FROM PmtsMemos WHERE PmtsMemos.InfinityRecNo = 0

in this example the memo field is ntext.

What can i do?

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Question by:tricks801
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6 Comments
 
LVL 11

Expert Comment

by:SweatCoder
ID: 11696264
what's the problem? an error?
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Author Comment

by:tricks801
ID: 11696302
ok, the Min was a mistake...but this is found as a subquery, so it is still coming up with the same error
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Author Comment

by:tricks801
ID: 11696307
sorry....the error is stated in the title:  The text, ntext, and image data types are invalid in this subquery or aggregate expression.
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Author Comment

by:tricks801
ID: 11696321
a very simplified version of the actual query...
select (SELECT (Memo) FROM PmtsMemos WHERE PmtsMemos.InfinityRecNo = 620073)
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LVL 1

Accepted Solution

by:
seangw earned 2000 total points
ID: 11696363
You can't select a min or max of a binary type (aggregate functions on ntext, etc.)  if you want to do so, you can try to convert the type to an integer then do the min on it.

This should raise the question on whether you are using the correct datatype here.  If you are always going to have numbers, you are best off correctly classifying the field as int, or float, to speed up the database as well as open up these useful aggregate functions.
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Author Comment

by:tricks801
ID: 11696421
the agg function was a mistake... i fixed it by cast(memo as nvarchar)

thanks
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