[英]How would you go about testing a class that can add tens of different filter to a query?
[英]how would you go about writing this sql query
编写查询以返回 column1 和 column2 的组合(在 table1 中)出现多次的记录
select column1, column2
from myTable
group by column1, column2
having count(*) > 1;
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.