Question

我需要MySQL查询的帮助来检查两个给定日期之间的当前日期并使用if条件。以下是我的查询声明：

$selMesQuery="select Subject, Message, PlainMessage, ARActiveTime, ARTimeZone, ARStartTime, AREndTime, ARID, UserId, DispLogo, ContentType from mytable";

ARActiveTime 0或1 。

ARStartTime，AREndTime将采用日期时间格式例如：2015-03-25 22:15:00

如果 ARActiveTime是＆＃39; 0＆＃39; ，我不需要 ARTimeZone，ARStartTime，AREndTime <的值/ em> 但我需要其他值。

仅当 ARActiveTime为＆＃39; 1＆＃39;时，我才需要 ARTimeZone，ARStartTime，AREndTime 的值以及其他值系统时间应介于ARStartTime和AREndTime之间。

如何使用mysql查询语句执行此操作？

我可以通过执行给定的查询来执行此操作，检查ARActiveTime是0还是1然后获取当前日期，使用php代码检查日期和日期。但是它只能用mysql语句来完成吗？

可以在查询中使用IF条件吗？我不确定。

非常感谢任何帮助。

sample data of mysql table: _________________________________________________________________________________ table header is as per the mysql query given __________________________________________________________________________________ sub1 | msg1 | pmsg1 | 0 | 0 |0000-00-00 00:00:00|0000-00-00 00:00:00| 1 | 1 | 0 | 2 _________________________________________________________________________________ sub2 | msg2 | pmsg2 | 1 | 3 |2015-03-12 10:00:00|2015-03-25 22:00:00| 2 | 1 | 1 | 1 _________________________________________________________________________________ sub3 | msg3 | pmsg3 | 1 | 2 |2015-03-10 20:00:00|2015-03-15 20:00:00| 3 | 2 | 1 | 2 _________________________________________________________________________________ sub4 | msg4 | pmsg4 | 0 | 0 |0000-00-00 00:00:00|0000-00-00 00:00:00| 4 | 3 | 0 | 3 _________________________________________________________________________________ desired result: _________________________________________________________________________________ sub1 | msg1 | pmsg1 | 1 | 1 | 0 | 2 _________________________________________________________________________________ sub2 | msg2 | pmsg2 | 1 | 3 |2015-03-12 10:00:00|2015-03-25 22:00:00| 2 | 1 | 1 | 1 _________________________________________________________________________________ sub3 | msg3 | pmsg3 | 1 | 2 |2015-03-10 20:00:00|2015-03-15 20:00:00| 3 | 2 | 1 | 2 _________________________________________________________________________________ sub4 | msg4 | pmsg4 | 4 | 3 | 0 | 3 _________________________________________________________________________________

Answer 1

试试这个

SELECT SUBJECT,
  Message,
  PlainMessage,
  ARActiveTime,
  ARTimeZone,
  ARStartTime,
  AREndTime,
  ARID,
  UserId,
  DispLogo,
  ContentType  FROM mytable WHERE ARActiveTime = 1
UNION ALL 
SELECT SUBJECT,
  Message,
  PlainMessage,
  ARActiveTime,
  NULL AS ARTimeZone,
  NULL AS ARStartTime,
  NULL AS AREndTime,
  ARID,
  UserId,
  DispLogo,
  ContentType FROM access_mgmt WHERE ARActiveTime = 0;

如何检查MySQL中两个给定日期之间的当前日期？

1 个答案: