MySQL 按首字母排序?
为了按首字母排序,请使用 ORDER BY CASE 语句。下面我们先创建一个表格 -
mysql> create table DemoTable1535 -> ( -> Value varchar(100) -> ); Query OK, 0 rows affected (2.26 sec)
使用 insert 命令在表格中插入一些记录 -
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 语句从表格中显示所有记录 -
mysql> select * from DemoTable1535;
这将生成以下输出 -
+------------------------------------+ | Value | +------------------------------------+ | MySQL is good relational database. | | is MySQL easy to lean | | You need to start basic SQL | +------------------------------------+ 3 rows in set (0.00 sec)
以下查询是按首字母排序的 -
mysql> select * from DemoTable1535 -> order by case when left(Value, 1) = 'i' then 1 else 2 end,Value;
这将生成以下输出 -
+------------------------------------+ | Value | +------------------------------------+ | is MySQL easy to lean | | MySQL is good relational database. | | You need to start basic SQL | +------------------------------------+ 3 rows in set (0.00 sec)
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