Hi,
On 10/29/2013 9:52 PM, h...@tbbs.net wrote:
2013/10/29 11:35 -0400, Shawn Green >>>>
My favorite technique is the COALESCE function for this on a column-by-column
basis
SET FieldName1 = Now(), FieldName2 = COALESCE(:MyVariable, FieldName2)
<<<<<<<<
but if MyVariable is NULL, FieldName1 reflects the attempt to change, not
change.
The way I understood the second explanation was like this.
He wants to update a row of data. The FieldName1 field is always updated
to the current date and time. If any of the new values (passed in via
variables) are not NULL for a specific column, replace the value on the
row with the new value otherwise maintain the current value.
He may yet mean something completely different than how I read it the
second time.
--
Shawn Green
MySQL Senior Principal Technical Support Engineer
Oracle USA, Inc. - Hardware and Software, Engineered to Work Together.
Office: Blountville, TN
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