John Fabiani, 23.09.2011 04:49:
I need to find the max(date) of a field but I need that value later in my
query.
If I
select max(x.date_field) as special_date from (select date_field) from table
where ...)x
I get one row and column.
But now I want to use that field in the rest of the query
select y.*, max(x.date_field) as special_date from (select date_field) from
table where ...)x
from aTable y where y.somefield = special_date.
The above only returns one row and one column the "special_date."
Not sure I undersand you correctly, but shouldn't the following be doing what
you want:
SELECT y.*
FROM table y
WHERE y.somefield = (SELECT max(x.date_field)
FROM table x
WHERE ...)
Thomas
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