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SQL IN query Command and statements |
SQL IN statement can be used with where clause to list a set of matching records
of a table. We can use SQL in query with NOT combination also to filter
out some records. This is our table
| id |
name |
class |
mark |
| 1 |
John Deo |
Four |
75 |
| 2 |
Max Ruin |
Three |
85 |
| 3 |
Arnold |
Three |
55 |
| 4 |
Krish Star |
Four |
60 |
| 5 |
John Mike |
Four |
60 |
| 6 |
Alex John |
Four |
55 |
| 7 |
My John Rob |
Fifth |
78 |
We will apply in command to display records of class Four and Fifth only.
SELECT * FROM `student` WHERE class IN ('Four','fifth')
| id |
name |
class |
mark |
| 1 |
John Deo |
Four |
75 |
| 4 |
Krish Star |
Four |
60 |
| 5 |
John Mike |
Four |
60 |
| 6 |
Alex John |
Four |
55 |
| 7 |
My John Rob |
Fifth |
78 |
Here above the sql in query returns the records of class Four and Fifth
only. We can apply NOT IN sql query also like below to remove some records
in display.
SELECT * FROM `student` WHERE class not IN ('Four','fifth')
| id |
name |
class |
mark |
| 2 |
Max Ruin |
Three |
85 |
| 3 |
Arnold |
Three |
55 |
We can link or collect data related to two different tables by using IN command. For example we have another sports table where we have the list of students joined in sports. We need not keep all the columns lime name , class etc. We can only keep the id filed. So our student can be collected from main table. Here is the query which will display only students joined in sports
Select * from student where id in ( select * from student_sports)
Here inside student_sports we have only one column storing the student id.
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