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g26

g26

V2EX member #460117, joined on 2019-12-19 10:55:49 +08:00
g26's recent replies
Dec 21, 2019
Replied to a topic by GroupF › MySQL › 大神们，问一个 sql 查询特别慢的问题，前人代码
查看 mysql 的版本，你的应该是 5.5 之前的，5.6 有优化


另外你的 sql 好像不全，建议改成 left join
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