左正

摘要： 用法如下： select case when exists(select 1 from t_test c where c.name = 'zhangsan' and c.age = 23 ) then 1 else 0 end from dual; select case when exists(s 阅读全文

摘要： [csharp] view plain copy print? //根据子项目id得到flowjump实体类 flowJumps = this.FlowJumps; //按工序groupby flowjumps IEnumerable<IGrouping<int, FlowJump>> query  阅读全文