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CREATE TABLE tabl2 (`cust` int, `note` varchar(4)) ; INSERT INTO tabl2 (`cust`, `note`) VALUES (1, 'foo0'), (2, 'foo1'), (2, 'foo2'), (3, 'foo3'), (3, 'foo3'), (3, 'foo4') ;
SELECT DISTINCT `cust`, `note` FROM tabl2 WHERE cust IN (SELECT Cust FROM tabl2 GROUP BY cust HAVING COUNT(DISTINCT note) > 1)
cust
note
2
foo1
2
foo2
3
foo3
3
foo4