Hi,
I am not sure if there ever was a feature request for using defined column aliases in the rest of a query.
This would make queries with a lot of logic in those aliased columns a lot smaller and this easier to write/debug.
I already know you can use the following syntax:
SELECT col1, col2, col3, (col2-col3) as col4 FROM (SELECT col1, (long and lots of logic here) as col2, col3 FROM table)
sWHERE col2 < aValue
But when you need to use (calculated) values from the actual record and or have sub-selects in your main select that
alsoneed to use these values things get really hairy.
I don't know if the SQL specification allows it but I know that RDBMS's like Sybase already support this.
Any thoughts?
Cheers,
Robert
