在同一个表中使用外连接进行SQL选择

Question

任何人都可以帮助查询选择仅在特定主题中输入而不在其他主题中输入的学生。假设我只在“Eng.Maths”中说。

STUDENT SUBJECT     MARK
Vels    Eng.Maths   60
Vels    Data.Mining 65
Stivel  Eng.Maths   55
Stivel  Data.Mining 69
Raj     Eng.Maths   66

Answer 1

SELECT * FROM Table1 t1
WHERE subject = 'Eng.Maths'
AND NOT EXISTS (SELECT NULL FROM Table1 t2
                WHERE t1.Student = t2.Student
                AND t2.Subject <> t1.subject)

SqlFiddle