如何限制MySQL LIKE 操作符以特定字符开头？

首先让我们创建一个表−

mysql> create table DemoTable
(
   FirstName varchar(40)
);
Query OK, 0 rows affected (0.52 sec)

使用插入命令将一些记录插入表中−

mysql> insert into DemoTable values('John');
Query OK, 1 row affected (0.08 sec)
mysql> insert into DemoTable values('Adam');
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable values('David');
Query OK, 1 row affected (0.21 sec)
mysql> insert into DemoTable values('Mike');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('Sam');
Query OK, 1 row affected (0.09 sec)

使用select语句显示表中的所有记录−

mysql> select *from DemoTable;

这将产生以下输出−

+-----------+
|FirstName  |
+-----------+
| John      |
| Adam      |
| David     |
| Mike      |
| Sam       |
+-----------+
5 rows in set (0.00 sec)

以下是限制LIKE操作符以特定字符开头的查询−

mysql> select *from DemoTable where FirstName LIKE 'D%' or FirstName LIKE 'S%';

这将产生以下输出−

+-----------+
| FirstName |
+-----------+
| David     |
| Sam       |
+-----------+
2 rows in set (0.00 sec)

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