SELECT的查詢輸出
誰能講一下這里的SELECT 分別查詢輸出的是什么
qq_耶丑_imuzC6
2018-11-07
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2018-12-10
select user_id,timestr,kills,(slelect count(*) from user_kills b where b-user_id=auser_id and a.lills <= b.killls)? ? ad cnt from use_kills a group by user_id = d.id here