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Displaying posts with tag: orderby (reset)
mysql中order by 和limit一起使用不当会导致效率极慢的4种优化方法

今天从慢查询发现一条语句查询时间达6秒。结果只查出一条记录。 原语句如下 SELECT biz_order_id, buyer_id, buyer_nick, item_id, item_name, total_price, buy_amount, pay_status, STATUS, att.

【mysql】  【BY】  【索引】  【Mobile】  【limit】  【慢查询】  【orderby】   …

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