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USING EXISTS with CO-RELATED SUB-QUERIES
Posted By:
Adalicia Fischer
Category:
Oracle
Views:
2393
This article explains about USING EXISTS with CO-RELATED SUB-QUERIES with example.
Customer - orders - salespeople database
USING EXISTS with CO-RELATED SUB-QUERIES
Find salespeople who having multiple(more than 1 customers)
SELECT DISTINCT snum FROM Customers outer WHERE EXISTS (SELECT * FROM Customers inner
WHERE inner.snum=outer.snum AND inner.cnum <> outer.cnum);
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Adalicia Fischer
author of USING EXISTS with CO-RELATED SUB-QUERIES is from Frankfurt,
Germany
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