SQL CASE语句（将CASE语句保留在WHERE子句中）

Question

I have a table named:

Ext_Meeting_Status

This has fields

1. Ext_Meeting_Status_ID
2. TEXT

The values are:

EXT_Meeting_Status_ID   Text
1   Draft
2   Published
3   Cancelled
4   Closed

How do i return the "Text" field of "Published" if date is today, else return "Close".

I tried using:

select * from Ext_Meeting_Status
where 
GETDATE() = CASE
    WHEN ( GETDATE() = '2010-12-13 10:02:31.560'  )
    THEN ( Ext_Meeting_Status_ID=2)
    ELSE ( Ext_Meeting_Status_ID=4)
    END

Answer 1

select * from Ext_Meeting_Status 
   where   Ext_Meeting_Status_ID = 
    CASE WHEN (GETDATE() = '2010-12-13 10:02:31.560')  
    THEN (2)     
    ELSE (4)
 END 

I believe this should work..

One more note : Comparing current date to the exact millisecond level might not work as the query may not get executed at that time...

You may try something like this.

Select getdate(), * from #Temp
  Where ID = Case when getdate() between '2010-12-13 05:21:08.240' and '2010-12-13 05:22:08.240'
                Then 1
                Else 2
             End

Answer 2

I don't think it's possible. You may want to try to put it all into a sub-select and use the CASE there.