MySQL BETWEEN 子句

BETWEEN 子句

您可以使用BETWEEN子句来替换“大于等于 and 小于等于”条件的组合。要了解BETWEEN子句，请考虑一个employee_tbl表，该表具有以下记录-

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，假设基于上表，您要获取行进日大于170且等于和小于300且等于的条件的记录。可以使用 >=和 <= 条件，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)

使用BETWEEN子句可以实现以下相同效果

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)