Select AS not working in interbase
質問
works
select payeeid, EXTRACT(WEEKDAY FROM checkdate) as DOW,
(bankcleared - checkdate) as DateDiff
from Master
where (bankcleared is not null)
order by payeeid, DOW, DateDiff
adding DateDiff
to Where
- does not work
select payeeid, EXTRACT(WEEKDAY FROM checkdate) as DOW,
(bankcleared - checkdate) as DateDiff
from Master
where (bankcleared is not null) AND (DateDiff >= 1)
order by payeeid, DOW, DateDiff
解決
You can only use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn't allow you to refer to a column alias in a WHERE clause. This restriction is imposed because when the WHERE code is executed, the column value may not yet be determined.
Try this
select payeeid, EXTRACT(WEEKDAY FROM checkdate) as DOW,
(bankcleared - checkdate) as DateDiff
from Master
where (bankcleared is not null) AND ((bankcleared - checkdate)>= 1)
order by payeeid, DOW, DateDiff
For more info go through these links
他のヒント
select payeeid,
EXTRACT(WEEKDAY FROM checkdate) as DOW,
(bankcleared - checkdate) as DateDiff
from Master
WHERE (bankcleared is not null)
AND ((bankcleared - checkdate)>= 1)
Order by payeeid, DOW, DateDiff
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