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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)
Updated on: 19-Nov-2020
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