mysql in 查詢效率慢優化

mysql> select * from abc_number_prop where number_id in (select number_id from abc_number_phone where phone = '82306839');mysql 爲了節省篇幅，省略了輸出內容，下同。sql 67 rows in set (12.00 sec)網絡 只有67行數據返回，卻花了12秒，而系統中

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