摘要: 执行语句1 select count(distinct uid) from usership ; 假设得到结果数据 10000 执行语句2 select count(distinct uid) from usership where groupid not in (select id from us 阅读全文
posted @ 2017-07-26 16:23 云淡风轻~ 阅读(118) 评论(0) 推荐(0) 编辑