I have two tables. SubjectTbl and SubjectAllotTbl.

This is my SubjectTbl

```
+------------+--------------+---------------------+--------------+--------+----------+
| Subject_Id | Subject_Code | Subject_Name        | Periods_Week | Dep_Id | Semester |
+------------+--------------+---------------------+--------------+--------+----------+
|          1 |         6012 | Basic Electronics   |           10 |      1 |        1 |
|          2 |         5412 | Computer Science    |            7 |      1 |        3 |
|          3 |         1421 | Musical Science     |            4 |      1 |        5 |
|          4 |          547 | Network Programming |            7 |      1 |        5 |
+------------+--------------+---------------------+--------------+--------+----------+

```

and SubjectAllotTbl

```
+------------+------------+
| Subject_Id | Teacher_Id |
+------------+------------+
|          1 |          1 |
|          2 |          3 |
|          3 |          2 |
+------------+------------+

```

All i want to do is selecting Subject\_Name from table SubjectTbl in which Same subject\_id Should not be present in the SubjectAllotTbl

I'm using MySql