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What is the purpose of ORDER BY columnname*1 in MySQL?
MySQL will implicitly convert the column into a number. Following is the syntax −
select * from yourTableName order by yourColumnName*1;
Let us first create a −
mysql> create table DemoTable1441 -> ( -> Id varchar(30) -> ); Query OK, 0 rows affected (0.53 sec)
Insert some records in the table using insert −
mysql> insert into DemoTable1441 values('301');
Query OK, 1 row affected (0.21 sec)
mysql> insert into DemoTable1441 values('23');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable1441 values('345');
Query OK, 1 row affected (0.42 sec)
mysql> insert into DemoTable1441 values('10');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable1441 values('38');
Query OK, 1 row affected (0.11 sec)Display all records from the table using select −
mysql> select * from DemoTable1441;
This will produce the following output −
+------+ | Id | +------+ | 301 | | 23 | | 345 | | 10 | | 38 | +------+ 5 rows in set (0.00 sec)
Following is the query to use order by columnname*1 −
mysql> select * from DemoTable1441 -> order by id*1;
This will produce the following output −
+------+ | Id | +------+ | 10 | | 23 | | 38 | | 301 | | 345 | +------+ 5 rows in set (0.00 sec)
Updated on: 12-Nov-2019
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