mysql left join 優化 大表驅動小表 小表驅動大表

SELECT s.id,s.nick,s.userId,s.sid,s.session_key,s.retoke,s.shouquantime,s.refresh_token_timeout,s.timezone,t.endtime from taobao_session as s LEFT JOIN taobao_productrepost_set as t on t.memberId=

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