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sql语句优化,order by desc速度优化
2022-07-06 09:40:00 【CSDN问答】
我有一个sql需要优化,使用 order by desc+ limit后查询速度特别慢。有什么办法可以解决吗?
SELECT electricity_meter from device_history_log WHERE device_id = '3130303934323735353339343030303030303030' and year (create_time) = '2022' ORDER BY id desc LIMIT 1
在网上找了一些解决方案,但大多数不符合情况以及没有效果,请各位帮忙看一下
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