使用 MySQL 实现特定的记录排序
要设置特定的记录顺序,请使用 ORDER BY LIKE。让我们首先创建一个表 -
mysql> create table DemoTable808(Value varchar(100)); Query OK, 0 rows affected (0.61 sec)
使用插入命令在表中插入一些记录 -
mysql> insert into DemoTable808 values('smith'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable808 values('Adamsmith'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable808 values('Carolsmith'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable808 values('smithJohn'); Query OK, 1 row affected (0.16 sec)
使用 select 语句显示表中的所有记录 -
mysql> select *from DemoTable808;
这将产生以下输出 -
+------------+ | Value | +------------+ | smith | | Adamsmith | | Carolsmith | | smithJohn | +------------+ 4 rows in set (0.00 sec)
以下是设置特定顺序的查询 -
mysql> select *from DemoTable808 order by case when Value like 'smith%' then 0 else 1 end asc,Value asc;
这将产生以下输出 -
+------------+ | Value | +------------+ | smith | | smithJohn | | Adamsmith | | Carolsmith | +------------+ 4 rows in set (0.00 sec)
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