如何按多列对 MySQL 行进行排序?
mysqlmysqli database更新于 2025/5/27 11:56:17
首先我们创建一个表 −
mysql> create table DemoTable -> ( -> FirstName varchar(20), -> LastName varchar(20) -> ); Query OK, 0 rows affected (1.44 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values('John','Smith');
Query OK, 1 row affected (0.35 sec)
mysql> insert into DemoTable values('Chris','Brown');
Query OK, 1 row affected (0.37 sec)
mysql> insert into DemoTable values('Carol','Taylor');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('David','Miller');
Query OK, 1 row affected (0.24 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
这将产生以下输出 −
+-----------+----------+ | FirstName | LastName | +-----------+----------+ | John | Smith | | Chris | Brown | | Carol | Taylor | | David | Miller | +-----------+----------+ 4 rows in set (0.00 sec)
以下是按多列对 MySQL 行进行排序的查询−
mysql> select *from DemoTable order by FirstName,LastName
输出
这将产生以下输出 −
+-----------+----------+ | FirstName | LastName | +-----------+----------+ | Carol | Taylor | | Chris | Brown | | David | Miller | | John | Smith | +-----------+----------+ 4 rows in set (0.24 sec)
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mysql 参考教程 - 该教程包含有关 mysql 的更多信息:https://www.cainiaomax.com/mysql/
