SQL组不通过内部联接工作
[英]SQL group by not working in inner join
问题描述
string sqlString =
"SELECT task.idtask, SUM(task.hours), task.overtime,
task.taskdate, task.description, developers.iddevelopers, developers.developerfname, projects.idprojects, projects.ProjectName" +
" FROM task" +
" INNER JOIN developers ON developers.iddevelopers = task.iddevelopers" +
" INNER JOIN projects ON projects.idprojects = task.idprojects"+
"GROUP BY projects.ProjectName ";
how do i get the results in grouped order of the ProjectName 
如何按ProjectName的分组顺序获取结果
1 个解决方案
解决方案1
0 2018-04-30 23:23:26
You have to include EVERY column in your select statement that is not an aggravate. 您必须在select语句中包括“ EVERY”一栏，但不要加重。
GROUP BY projects.ProjectName, task.idtask,task.overtime, task.taskdate, task.description, developers.iddevelopers, developers.developerfname, projects.idprojects GROUP BY projects.ProjectName，task.idtask，task.overtime，task.taskdate，task.description，developers.iddevelopers，developers.developerfname，projects.idprojects
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