Sort MySQL table by two columns?-Mysql Tutorial-php.cn

Sort MySQL table by two columns?

WBOY

Release： 2023-09-04 19:53:10

forward

1216 people have browsed it

按两列对 MySQL 表进行排序？

Sort a MySQL table by two columns with the help of the following syntax -

order by yourColumnName1 DESC,yourColumnName2 DESC;

Copy after login

Let us first create a table for our example -

mysql> create table OrderByDemo
   -> (
   -> StudentId int,
   -> StudentName varchar(100),
   -> StudentAge int
   -> );
Query OK, 0 rows affected (0.57 sec)

Copy after login

With the help of The insert command inserts records into the table. The query is as follows -

mysql> insert into OrderByDemo values(1,'John',23);
Query OK, 1 row affected (0.20 sec)
mysql> insert into OrderByDemo values(3,'Johnson',24);
Query OK, 1 row affected (0.27 sec)
mysql> insert into OrderByDemo values(4,'Carol',26);
Query OK, 1 row affected (0.14 sec)
mysql> insert into OrderByDemo values(2,'David',20);
Query OK, 1 row affected (0.13 sec)

Copy after login

Now, apply the above syntax to sort the two columns in the MySQL table. The query is as follows -

mysql> select *from OrderByDemo order by StudentId ASC, StudentAge ASC;

Copy after login

The following is the output of sorting the two columns in ascending order -

+-----------+-------------+------------+
| StudentId | StudentName | StudentAge |
+-----------+-------------+------------+
|         1 | John        |         23 |
|         2 | David       |         20 |
|         3 | Johnson     |         24 |
|         4 | Carol       |         26 |
+-----------+-------------+------------+
4 rows in set (0.00 sec)

Copy after login

Or you can do it in descending order with the help of DESC command. The query is as follows -

mysql> select *from OrderByDemo order by StudentId DESC,StudentAge DESC;

Copy after login

The following is the output -

+-----------+-------------+------------+
| StudentId | StudentName | StudentAge |
+-----------+-------------+------------+
|         4 | Carol       |         26 |
|         3 | Johnson     |         24 |
|         2 | David       |         20 |
|         1 | John        |         23 |
+-----------+-------------+------------+
4 rows in set (0.00 sec)

Copy after login

Note - Primary sorting works first.

The above is the detailed content of Sort MySQL table by two columns?. For more information, please follow other related articles on the PHP Chinese website!