MySQL 按首字母排序?
mysqlmysqli database
要按首字母排序，请使用 ORDER BY CASE 语句。让我们首先创建一个表 −
mysql> create table DemoTable1535 -> ( -> Value varchar(100) -> ); Query OK, 0 rows affected (2.26 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1535 values('MySQL is good relational database.');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1535 values('is MySQL easy to lean');
Query OK, 1 row affected (0.35 sec)
mysql> insert into DemoTable1535 values('You need to start basic SQL');
Query OK, 1 row affected (0.35 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1535;
这将产生以下输出 −
+------------------------------------+ | Value | +------------------------------------+ | MySQL is good relational database. | | is MySQL easy to lean | | You need to start basic SQL | +------------------------------------+ 3 rows in set (0.00 sec)
以下是按首字母排序的查询 −
mysql> select * from DemoTable1535 -> order by case when left(Value, 1) = 'i' then 1 else 2 end,Value;
这将产生以下输出 −
+------------------------------------+ | Value | +------------------------------------+ | is MySQL easy to lean | | MySQL is good relational database. | | You need to start basic SQL | +------------------------------------+ 3 rows in set (0.00 sec)
