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  • 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)  

     相关资料

    MySQL GROUP BY 子句

    MySQL COUNT 函数

    MySQL CONCAT 函数

     

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  • 原文地址:https://www.cnblogs.com/jc2182/p/12753600.html
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