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explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
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183
select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
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CREATE TABLE t1( a INT, b INT, KEY(a), KEY(b) );
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INSERT INTO t1 VALUES (1, 2), (1, 2), (1, 2), (1, 2);