SQL IN

IN 操作符

IN 操作符允许您在 WHERE 子句中规定多个值。

SQL IN 语法

SELECT column_name(s)
FROM table_name
WHERE column_name IN (value1,value2,...);

演示数据库

在本教程中,我们将使用 Web3 样本数据库。

下面是选自 "Websites" 表的数据:

+----+--------------+---------------------------+-------+---------+
| id | name         | url                       | alexa | country |
+----+--------------+---------------------------+-------+---------+
| 1  | Google       | https://www.google.cm/    | 1     | USA     |
| 2  | 淘宝          | https://www.taobao.com/   | 13    | CN      |
| 3  | 芝麻教程      | http://www.web3.xin/    | 4689  | CN      |
| 4  | 微博          | http://weibo.com/         | 20    | CN      |
| 5  | Facebook     | https://www.facebook.com/ | 3     | USA     |
| 7  | stackoverflow | http://stackoverflow.com/ |   0 | IND     |
+----+---------------+---------------------------+-------+---------+

IN 操作符实例

下面的 SQL 语句选取 name 为 "Google" 或 "芝麻教程" 的所有网站:

实例

SELECT * FROM Websites
WHERE name IN ('Google','芝麻教程'); 
1执行输出结果:
mysql> select * from websites where name in ('芝麻教程','Google');
+----+----------+------------------------+-------+---------+
| id | name     | url                    | alexa | country |
+----+----------+------------------------+-------+---------+
|  1 | Google   | https://www.google.cm/ | 1     | USA     |
|  3 | 芝麻教程 | http://www.web3.xin/   | 5000  | USA     |
+----+----------+------------------------+-------+---------+
2 rows in set (0.00 sec)
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