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9 lines
421 B
SQL
9 lines
421 B
SQL
EXPLAIN
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SELECT * FROM t1
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WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3
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WHERE t3.name='xxx' AND t2.id=t3.id);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
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2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Using index; Full scan on NULL key
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2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Full scan on NULL key
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