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1 SIMPLE t1 ref t t 43 const # Using where
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explain select count(*) from t1 where v like 'a%';
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id select_type table type possible_keys key key_len ref rows Extra
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explain select count(*) from t1 where v between 'a' and 'a ';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref v v 43 const # Using where