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DROP TABLE IF EXISTS test; DROP TABLE IF EXISTS test2; CREATE TABLE test2( id_2 INT UNSIGNED, PRIMARY KEY (id_2) )ENGINE=InnoDB; CREATE TABLE test( id_1 INT UNSIGNED, id_2 INT UNSIGNED, PRIMARY KEY (id_1) )ENGINE=InnoDB; INSERT INTO test2(id_2) VALUES (1),(2),(3),(4),(5),(6),(7), (8); INSERT INTO test(id_1, id_2) VALUES (1,1), (2,1), (3,1), (4,2), (5,3), (6,4), (7,4);
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