MySQL的BETWEEN AND范围查询问题

1.时间范围

1.1create_time是datetime类型,参数带时分秒(yyyy-MM-dd HH:mm:ss)

SELECT
    e.create_time DATA 
FROM
    sys_enforce_event e 
WHERE
    e.create_time BETWEEN '2019-03-22 09:39:33' AND '2019-03-25 15:17:51'

查询结果如下图:

MySQL的BETWEEN AND范围查询问题

结论:  若datetime类型时,查询参数带时分秒,BETWEEN AND相当于  x >= y && x<=z。即包含头尾。

1.2create_time是datetime类型,参数不带时分秒(yyyy-MM-dd)

SELECT
    e.create_time DATA 
FROM
    sys_enforce_event e 
WHERE
    e.create_time BETWEEN '2019-03-22' AND '2019-03-25'

查询结果如下图:

MySQL的BETWEEN AND范围查询问题

结论:  若datetime类型时,查询参数不带时分秒,BETWEEN AND相当于  x >= y && x<z。即只包含头。

1.2create_time是date类型,参数(yyyy-MM-dd)

SELECT
    l.create_time 
FROM
    sys_enforce_black_list l 
WHERE
    l.create_time BETWEEN '2019-02-01' AND '2019-03-02'

查询结果如下图:

MySQL的BETWEEN AND范围查询问题

结论:  若date类型时,BETWEEN AND相当于  x >= y && x<=z。

2.数字范围

SELECT
    l.release_state 
FROM
    sys_enforce_black_list l 
WHERE
    l.release_state BETWEEN 1 AND 4

如图所示:

MySQL的BETWEEN AND范围查询问题

 

 

结论:  若int类型时,BETWEEN AND相当于  x >= y && x<=z。

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