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0 votesanswersviews
期待结果不是来自mysql INNER JOIN
我有两个表: table: loan -------------------------------------------------------- id | advance_id | loan_amount | deposit_amount | date -------------------------------------------------------- 1 | 2255667... -
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在where子句和具有子句之间执行联合/或运算
我正在研究SQL的实现,它应该在Where和Having Clause之间显示Union操作的结果 . 例如, Select * from table where col1= 'get' group by col2 (OR/UNION) having avg(col3) >30 . This is not valid but trying to give use a case sql语句的... -
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用group by,2 having和where子句加入4个表
我有数据库包含4个表: 个用户(id,"name",姓氏,生日) 友谊(userid1,userid2,"timestamp") 个帖子(id,userid,"text","timestamp") 喜欢(postid,userid,"timestamp") 我需要在2018年1月...