SQL BETWEEN
BETWEEN 操作符用于选取介于两个值之间的数据范围内的值。
SQL BETWEEN 操作符
BETWEEN 操作符选取介于两个值之间的数据范围内的值。这些值可以是数值、文本或者日期。
SQL BETWEEN 语法
SELECT column_name(s)
FROM table_name
WHERE column_name BETWEEN value1 AND value2;
FROM table_name
WHERE column_name BETWEEN value1 AND value2;
演示数据库
在本教程中,我们将使用 JSON 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 | 小白教程 | http://www.json.cn | 888 | CN | | 4 | 微博 | http://weibo.com/ | 20 | CN | | 5 | Facebook | https://www.facebook.com/ | 3 | USA | | 7 | stackoverflow | http://stackoverflow.com/ | 0 | IND | +----+---------------+---------------------------+-------+---------+
BETWEEN 操作符实例
下面的 SQL 语句选取 alexa 介于 1 和 20 之间的所有网站:
实例
SELECT * FROM Websites
WHERE alexa BETWEEN 1 AND 20;
WHERE alexa BETWEEN 1 AND 20;
NOT BETWEEN 操作符实例
如需显示不在上面实例范围内的网站,请使用 NOT BETWEEN:
实例
SELECT * FROM Websites
WHERE alexa NOT BETWEEN 1 AND 20;
WHERE alexa NOT BETWEEN 1 AND 20;
带有 IN 的 BETWEEN 操作符实例
下面的 SQL 语句选取 alexa 介于 1 和 20 之间但 country 不为 USA 和 IND 的所有网站:
实例
SELECT * FROM Websites
WHERE (alexa BETWEEN 1 AND 20)
AND country NOT IN ('USA', 'IND');
WHERE (alexa BETWEEN 1 AND 20)
AND country NOT IN ('USA', 'IND');
带有文本值的 BETWEEN 操作符实例
下面的 SQL 语句选取 name 以介于 'A' 和 'H' 之间字母开始的所有网站:
实例
SELECT * FROM Websites
WHERE name BETWEEN 'A' AND 'H';
WHERE name BETWEEN 'A' AND 'H';
带有文本值的 NOT BETWEEN 操作符实例
下面的 SQL 语句选取 name 不介于 'A' 和 'H' 之间字母开始的所有网站:
实例
SELECT * FROM Websites
WHERE name NOT BETWEEN 'A' AND 'H';
WHERE name NOT BETWEEN 'A' AND 'H';
示例表
下面是 "access_log" 网站访问记录表的数据,其中:
mysql> SELECT * FROM access_log; +-----+---------+-------+------------+ | aid | site_id | count | date | +-----+---------+-------+------------+ | 1 | 1 | 45 | 2016-05-10 | | 2 | 3 | 100 | 2016-05-13 | | 3 | 1 | 230 | 2016-05-14 | | 4 | 2 | 10 | 2016-05-14 | | 5 | 5 | 205 | 2016-05-14 | | 6 | 4 | 13 | 2016-05-15 | | 7 | 3 | 220 | 2016-05-15 | | 8 | 5 | 545 | 2016-05-16 | | 9 | 3 | 201 | 2016-05-17 | +-----+---------+-------+------------+ 9 rows in set (0.00 sec)
带有日期值的 BETWEEN 操作符实例
下面的 SQL 语句选取 date 介于 '2016-05-10' 和 '2016-05-14' 之间的所有访问记录:
实例
SELECT * FROM access_log
WHERE date BETWEEN '2016-05-10' AND '2016-05-14';
WHERE date BETWEEN '2016-05-10' AND '2016-05-14';
请注意,在不同的数据库中,BETWEEN 操作符会产生不同的结果! 因此,请检查您的数据库是如何处理 BETWEEN 操作符! |