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Updating table through arithmetic function

 
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madlui56
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PostPosted: Thu Aug 30, 2007 3:07 pm    Post subject: Updating table through arithmetic function
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How is this done?Is this possible?
I just want to update a specific field in the table wherein I will just have to subtract an amount to that particular field..How is this done?

Such us;

Update table
set table field = (field - 400)

Thanks
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dbzTHEdinosauer

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PostPosted: Thu Aug 30, 2007 3:12 pm    Post subject:
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yep, except for the syntax you have it right. 'Manuals' hyperlink at the very top of this page, then look for an SQL manual to find out the exact syntax for an update. You should include a WHERE clause to insure that you only UPDATE rows that you want and not all rows in the table.

The parenthesis in the SET statement are not required.
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madlui56
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PostPosted: Thu Aug 30, 2007 3:17 pm    Post subject: Thanks
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I will find the document you suggested
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dick scherrer

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PostPosted: Thu Aug 30, 2007 8:38 pm    Post subject:
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Hello,

Is a negative value valid for "field"?

If not, you would test to make sure that the -400 did not result in a negative value.
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