Select StuId,StuName From tblStudent st Where not exists
(
Select CourseID From tblCourse cu Inner Join tblTeacher tc On cu.TeaID=tc.TeaID
Where tc.TeaName='叶平' And CourseID not in
(Select CourseID From tblScore Where StuID=st.StuID)
)
表结构如下:
tblStudent (stuid,stuname,stusex,stuage);
tblCourse (stuid,courseid,score);
tblTeacher (teaid,teaname,courseid);
(
Select CourseID From tblCourse cu Inner Join tblTeacher tc On cu.TeaID=tc.TeaID
Where tc.TeaName='叶平' And CourseID not in
(Select CourseID From tblScore Where StuID=st.StuID)
)
表结构如下:
tblStudent (stuid,stuname,stusex,stuage);
tblCourse (stuid,courseid,score);
tblTeacher (teaid,teaname,courseid);
Select StuId,StuName From tblStudent st Where not exists --找学生信息部在(2) 里面的学生
(
Select CourseID
From tblCourse cu
Inner Join tblTeacher tc On cu.TeaID=tc.TeaID --去课程表 找到‘叶平’老师 并且 课程id 不在 (1) 里面的CourseID
Where tc.TeaName='叶平'
And CourseID not in (Select CourseID From tblScore Where StuID=st.StuID) --成绩表StuID和Student表StuID对应Course
)
--查看方法:从内往外--
--1:
--成绩表StuID和Student表StuID对应CourseID
--2:
--去课程表 找到‘叶平’老师 并且 课程id 不在 (1) 里面的CourseID
--3:
--找学生信息部在(2) 里面的学生