On Monday 20 February 2006 03:27, Veerabhadrarao Narra wrote:
> Hi
>
> i ahve one table table_1 and columns like col_1,col_2,col_3
>
> col_1 col_2 col_3
> 1 aa aaa
> 2 bb
>
> Now i want to update my table table_1 SET col_3 as bbb where max of col_1
>
> I wrote this below Query but it shows error how to write
>
> UPDATE table_1
> SET col_3 = 'bbb'
> WHERE col_1 = (SELECT max(col_1) FROM table_1)
It appears that you can't do what you want.
This is at the bottom of the UPDATE syntax page:
" Currently, you cannot update a table and select from the same table in a
subquery."
<http://dev.mysql.com/doc/refman/5.0/en/update.html>
However, you can to something like:
select @maximum_column :=max(col_1) from table_1;
UPDATE table_1
SET col_3 = 'bbb'
WHERE col_1 = @maximum_column;
Perhaps someone else has a better solution.
--
Jeff Shapiro
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