Conditional update

I want to update a varbinary(max). If the column is null, then I will just
set it, but if not null, then append with a .Write. Something like:
row = select...
if (row.Document = null)
Update myTable
Set Document = 0xFF
where FileName = 'Text99.txt';
else
UPDATE myTable
SET Document .WRITE(0xFF, null, 0)
WHERE FileName = 'Text99.txt';
What is the pattern to do this sort of thing? TIA
William Stacey [MVP]William Stacey [MVP] wrote:
> I want to update a varbinary(max). If the column is null, then I
> will just set it, but if not null, then append with a .Write.
> Something like:
> row = select...
> if (row.Document = null)
> Update myTable
> Set Document = 0xFF
> where FileName = 'Text99.txt';
> else
> UPDATE myTable
> SET Document .WRITE(0xFF, null, 0)
> WHERE FileName = 'Text99.txt';
> What is the pattern to do this sort of thing? TIA
Update MyTable
Set Document =
CASE ISNULL(Document, -99)
WHEN -99 THEN SOMETHING
WHEN Document THEN SOMETHING_ELSE
END
Where FileName = 'Text99.txt'
Even easier would be to write a stored procedure and set the new column
value accordingly using a local variable.
David Gugick
Quest Software
www.imceda.com
www.quest.com|||Thanks David.
William Stacey [MVP]