MySQL 范围查询 BETWEEN 的用法

您可以使用BETWEEN子句来替换“大于等于和小于等于”条件的组合。

要理解BETWEEN子句，请考虑一个有以下记录的employee_tbl表 ：

mysql> SELECT * FROM employee_tbl;
+------+------+------------+--------------------+
|  id  | name | work_date  | daily_typing_pages |
+------+------+------------+--------------------+
|   1  | John | 2007-01-24 |        250         |
|   2  | Ram  | 2007-05-27 |        220         |
|   3  | Jack | 2007-05-06 |        170         |
|   3  | Jack | 2007-04-06 |        100         |
|   4  | Jill | 2007-04-06 |        220         |
|   5  | Zara | 2007-06-06 |        300         |
|   5  | Zara | 2007-02-06 |        350         |
+------+------+------------+--------------------+
7 rows in set (0.00 sec)

现在，假设根据上表，您要获取条件 daily_typing_pages 大于 170 且等于且小于 300 且等于的记录。这可以使用>=和<=条件完成，如下所示 ：

mysql>SELECT * FROM employee_tbl 
   ->WHERE daily_typing_pages >= 170 AND
   ->daily_typing_pages <= 300;
+------+------+------------+--------------------+
|  id  | name | work_date  | daily_typing_pages |
+------+------+------------+--------------------+
|   1  | John | 2007-01-24 |        250         |
|   2  | Ram  | 2007-05-27 |        220         |
|   3  | Jack | 2007-05-06 |        170         |
|   4  | Jill | 2007-04-06 |        220         |
|   5  | Zara | 2007-06-06 |        300         |
+------+------+------------+--------------------+
5 rows in set (0.03 sec)

同样可以使用BETWEEN子句实现，如下所示 ：

mysql> SELECT * FROM employee_tbl 
   -> WHERE daily_typing_pages BETWEEN 170 AND 300; 
+------+------+------------+--------------------+
|  id  | name | work_date  | daily_typing_pages |
+------+------+------------+--------------------+
|   1  | John | 2007-01-24 |        250         |
|   2  | Ram  | 2007-05-27 |        220         |
|   3  | Jack | 2007-05-06 |        170         |
|   4  | Jill | 2007-04-06 |        220         |
|   5  | Zara | 2007-06-06 |        300         |
+------+------+------------+--------------------+
5 rows in set (0.03 sec)