Placing order according to the condition in MySQL?

For this, use ORDER BY CASE WHEN statement.

Let us create a table −

mysql> create table demo51
−> (
−> id int not null auto_increment primary key,
−> name varchar(20)
−> );
Query OK, 0 rows affected (1.08 sec)

Insert some records into the table with the help of insert command −

mysql> insert into demo51(name) values('John');
Query OK, 1 row affected (0.15 sec)

mysql> insert into demo51(name) values('Bob');
Query OK, 1 row affected (0.09 sec)

mysql> insert into demo51(name) values('David');
Query OK, 1 row affected (0.35 sec)

mysql> insert into demo51(name) values('Sam');
Query OK, 1 row affected (0.14 sec)

Display records from the table using select statement −

mysql> select *from demo51;

This will produce the following output −

+----+-------+
| id | name  |
+----+-------+
|  1 | John  |
|  2 | Bob   |
|  3 | David |
|  4 | Sam   |
+----+-------+
4 rows in set (0.00 sec)

Following is the query to place order according to the condition −

mysql> select *from demo51
−> order by
−> case when name="John" then 110
−> when name="Bob" then 105
−> when name="David" then 104
−> else 101
−> end;

This will produce the following output −

+----+-------+
| id | name  |
+----+-------+
|  4 | Sam   |
|  3 | David |
|  2 | Bob   |
|  1 | John  |
+----+-------+
4 rows in set (0.00 sec)