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cdcdc

V2EX member #477283, joined on 2020-03-18 10:35:50 +08:00
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Nov 22, 2021
Replied to a topic by Macv1994 › 程序员 › 一个 MySQL 查询问题
如果只是为了去重，就用 select xxx, DISTINCT sender_id WHERE receiver_id = 12
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