MySQL选择查询有多个WHERE？
要实现多个WHERE，请使用IN()INMySQL。
以下是语法：
select *from yourTableName where yourColumnName IN(yourValue1,yourValue2,...N);
让我们首先创建一个表-
mysql> create table DemoTable ( Id int, Name varchar(100) );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values(10,'John'); mysql> insert into DemoTable values(59,'Carol'); mysql> insert into DemoTable values(20,'Sam'); mysql> insert into DemoTable values(45,'David');
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
输出结果
+------+-------+ | Id | Name | +------+-------+ | 10 | John | | 59 | Carol | | 20 | Sam | | 45 | David | +------+-------+ 4 rows in set (0.00 sec)
以下是实现多个WHERE的查询-
mysql> select *from DemoTable where Id IN(59,45);
输出结果
+------+-------+ | Id | Name | +------+-------+ | 59 | Carol | | 45 | David | +------+-------+ 2 rows in set (0.14 sec)