Question

SELECT * FROM myDateTable 
WHERE date_Start 
OR date_end 
BETWEEN DateValue('" & CoverMonth_start & "') 
AND DateValue('" & CoverMonth_end & "')"

{1}}和CoverMonth_start日期从1月到12月循环播放。该查询应该只选择记录_end。但是这个查询正在选择数据库中的所有记录。

Answer 1

您的查询没有按照您的想法进行。

OR是您的问题 - 在填充date_start的那一刻，将返回该记录。

这可能是您想要的查询：

 SELECT * FROM myDateTable 
 WHERE (date_Start 
    BETWEEN DateValue('" & CoverMonth_start & "') 
    AND DateValue('" & CoverMonth_end & "')")
 OR (date_end 
    BETWEEN DateValue('" & CoverMonth_start & "') 
    AND DateValue('" & CoverMonth_end & "')")

Answer 2

这是因为您正在执行date_Start OR....，这是选择date_Start中任意值且date_End处于给定值范围内的所有记录。

你应该写的是：

SELECT * FROM myDateTable WHERE
    date_Start BETWEEN DateValue('" & CoverMonth_start & "') AND DateValue('" & CoverMonth_end & "')"
    OR 
    date_end BETWEEN DateValue('" & CoverMonth_start & "') AND DateValue('" & CoverMonth_end & "')"

Answer 3

SELECT * FROM myDateTable WHERE date_Start between date1 and date2 OR date_end BETWEEN date1 and date2

Answer 4

SELECT * 
FROM myDateTable
WHERE (date_start BETWEEN .... AND ....)
OR
(date_end BETWEEN .... AND ....)

Answer 5

OR的优先级低于BETWEEN。

WHERE date_Start OR date_end BETWEEN a AND b转换为 WHERE CAST(date_Start AS BOOLEAN) = true OR ( date_end BETWEEN a AND b)

你想要的是......哦，看到其他答案（一个简单的问题，不是吗？）

SQL BETWEEN 2个日期值HELP

5 个答案: