微客导航 » 文章资讯 » 在MySQL中正确实现AND条件

在MySQL中正确实现AND条件

2024-05-10 07:43:05 450

要实现AND条件，语法如下-

select *from yourTableName where yourColumnName1 = yourValue1 AND yourColumnName2 = yourValue2;

为了理解上述语法，让我们创建一个表。创建表的查询如下-

mysql> create table MySQLANDConditionDemo
   -> (
   -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> Name varchar(100),
   -> Age int
   -> );

使用insert命令在表中插入一些记录。查询如下-

mysql> insert into MySQLANDConditionDemo(Name,Age) values('Larry',23);
mysql> insert into MySQLANDConditionDemo(Name,Age) values('Mike',21);
mysql> insert into MySQLANDConditionDemo(Name,Age) values('Sam',24);
mysql> insert into MySQLANDConditionDemo(Name,Age) values('David',26);
mysql> insert into MySQLANDConditionDemo(Name,Age) values('Carol',27);
mysql> insert into MySQLANDConditionDemo(Name,Age) values('Bob',28);

使用select语句显示表中的所有记录。查询如下-

mysql> select *from MySQLANDConditionDemo;

这是输出-

+----+-------+------+
| Id | Name  | Age  |
+----+-------+------+
| 1  | Larry | 23   |
| 2  | Mike  | 21   |
| 3  | Sam   | 24   |
| 4  | David | 26   |
| 5  | Carol | 27   |
| 6  | Bob   | 28   |
+----+-------+------+
6 rows in set (0.00 sec)

以下是对MySQLAND条件的查询-

mysql> select *from MySQLANDConditionDemo where Name ='Mike' AND Age =21;

这是输出-

+----+------+------+
| Id | Name | Age  |
+----+------+------+
| 2  | Mike | 21   |
+----+------+------+
1 row in set (0.00 sec)

返回顶部
3162201930
czq8825@qq.com

在MySQL中正确实现AND条件

热门推荐

随机推荐