Recursive SQL

Posted: February 8, 2012 in blog

Interesting query.

WITH temptab(deptid, empcount, superdept) AS
( SELECT root.deptid, root.empcount, root.superdept
FROM departments root
WHERE deptname=’Production’
UNION ALL
SELECT sub.deptid, sub.empcount, sub.superdept
FROM departments sub, temptab super
WHERE sub.superdept = super.deptid
)
SELECT sum(empcount) FROM temptab

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