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CREATE TABLE Users( ID INT ); INSERT INTO Users VALUES (1), (3), (4); CREATE TABLE Urls( ID INT, Url VARCHAR(45) ); INSERT INTO Urls VALUES (1, 'a.com'), (1, 'b.com'), (1, 'd.com'), (2, 'a.com'), (2, 'e.com'), (3, 'a.com'), (3, 'e.com'), (3, 'f.com'), (3, 'g.com'), (4, 'a.com'), (4, 'e.com'); SELECT T1.Url FROM Urls T1 INNER JOIN Users T2 ON T1.ID = T2.ID WHERE EXISTS( SELECT 1 FROM Urls WHERE ID != T1.ID AND Url = T1.Url ) GROUP BY T1.Url; SELECT T1.Url FROM Urls T1 INNER JOIN Urls T2 ON T1.ID != T2.ID AND T1.Url = T2.Url INNER JOIN Users U ON T1.ID = U.ID GROUP BY T1.Url;
Url
a.com
e.com
Url
a.com
e.com