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hscovo
V2EX member #560446, joined on 2021-11-02 14:44:27 +08:00
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Sep 22, 2022
Replied to a topic by
rateltalk
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MySQL
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左连接表查询用到了索引，为何还是走全表扫描？
left join 我理解就是取出左表的每一行记录，去右表里面查询吧？
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