怎么删除 多表关联查询出来的数据

[qq_17071143]

select * from(
select StudentID,StudentName,b.Grade,b.ClassName,StudentGender,b.SchoolName,b.ClassID,b.SchoolID,a.ClassId as '学生表班级ID' from studentInfo as a
LEFT OUTER JOIN
(select classInfo.ClassID,classInfo.ClassName,classInfo.Grade,classInfo.Teacher,schoolInfo.SchoolName,schoolInfo.SchoolID from classInfo
LEFT OUTER JOIN schoolInfo on classInfo.SchoolID=schoolInfo.SchoolID)
as b on b.ClassID=a.ClassID) as c where c.SchoolName is NULL

[qq_17071143]

单个表删那么多数据我都不知道是那些

[xqchenxue2]

你要删除哪个表

[qq_17071143]

studentInfo 上面查询查来的那写数据

[Neo_whl]

多表关联的数据，一次操作删不了的，最好逐表删除。