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Case statement based on time then between dates

Posted on 2011-03-24
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Last Modified: 2012-08-13
I am having problems with the correct syntax for the below query I have tried a number variations but inevitably SQL throws a dummy spit. Looking for suggestions to achieve the results I have written in longhand the first line of the query works fine. It returning the required records I have the issues with. You can use the table below if required as a test sample

create table Date_Sample(dt datetime,amount int)
insert into table1 select '01/26/2011 8:00', 3
insert into table1 select '01/26/2011 9:00', 2
insert into table1 select '01/26/2011 16:00', 2
insert into table1 select '01/26/2011 20:00', 6
insert into table1 select '01/25/2011 20:00', 3
insert into table1 select '01/25/2011 20:10', 1
insert into table1 select '01/25/2011 21:30', 2
insert into table1 select '01/25/2011 16:30', 2
insert into table1 select '01/25/2011 08:30', 2
insert into table1 select '01/25/2011 06:00', 2


declare @getdate datetime
set @getdate='1/26/2011 06:04'

select *

From test.dbo.Date_Sample
Where (CASE
WHEN @GetDate datepart(hh,@getdate)< 7 THEN
      Query the dt field for all records between 07:00 AM and 19:00 the day before
WHEN @Getday datepart(hh,@getdate) < 19 THEN
      Query the dt field for all records between 19:00 the day before to 7:00AM today
When @GetDate datepart (hh,@getdate) >=19 THEN
      Query the dt field for all records between 07:00 AM and 19:00 today      
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Question by:IT SSM
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6 Comments
 
LVL 33

Expert Comment

by:knightEknight
ID: 35212392
Here's something to try:


declare @getdate datetime
set @getdate='1/26/2011 06:04'

select *
from test.dbo.Date_Sample
where (datepart(hh,@getdate)<7 and dt>=dateadd(hour,7,convert(datetime,convert(int,dt-1.5))) and dt<dateadd(hour,19,convert(datetime,convert(int,GETDATE()-1.5))) )
   OR (datepart(hh,@getdate)>=7 and datepart(hh,@getdate)<19 and dt>=dateadd(hour,19,convert(datetime,convert(int,dt-1.5))) and dt<dateadd(hour,7,convert(datetime,convert(int,GETDATE()-0.5))) )
   OR (datepart(hh,@getdate)>=19 and dt>=dateadd(hour,7,convert(datetime,convert(int,dt-0.5))) and dt<dateadd(hour,19,convert(datetime,convert(int,GETDATE()-0.5))) )

0
 
LVL 33

Expert Comment

by:knightEknight
ID: 35212398
re-posting as code ..
declare @getdate datetime
set @getdate='1/26/2011 06:04'

select *
from test.dbo.Date_Sample
where (datepart(hh,@getdate)<7 and dt>=dateadd(hour,7,convert(datetime,convert(int,dt-1.5))) and dt<dateadd(hour,19,convert(datetime,convert(int,GETDATE()-1.5))) )
   OR (datepart(hh,@getdate)>=7 and datepart(hh,@getdate)<19 and dt>=dateadd(hour,19,convert(datetime,convert(int,dt-1.5))) and dt<dateadd(hour,7,convert(datetime,convert(int,GETDATE()-0.5))) )
   OR (datepart(hh,@getdate)>=19 and dt>=dateadd(hour,7,convert(datetime,convert(int,dt-0.5))) and dt<dateadd(hour,19,convert(datetime,convert(int,GETDATE()-0.5))) )

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LVL 33

Expert Comment

by:knightEknight
ID: 35212418
You may need to replace GETDATE() with @getdate for testing (fyi)
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LVL 41

Accepted Solution

by:
Sharath earned 2000 total points
ID: 35212420
try like this.
declare @getdate datetime
set @getdate='1/26/2011 06:04'
SELECT *
  FROM Date_Sample 
 WHERE (DATEPART(HH,@getdate) < 7 
        AND dt BETWEEN DATEADD(HH,7,CONVERT(DATETIME,CONVERT(DATE,DATEADD(dd,-1,@getdate)))) AND DATEADD(hh,19,CONVERT(DATETIME,CONVERT(DATE,DATEADD(dd,-1,@getdate)))))
        OR (DATEPART(HH,@getdate) BETWEEN 8 AND 18 
            AND dt BETWEEN DATEADD(HH,19,CONVERT(DATETIME,CONVERT(DATE,DATEADD(dd,-1,@getdate)))) AND DATEADD(hh,7,CONVERT(DATETIME,CONVERT(DATE,@getdate))))
        OR (DATEPART(HH,@getdate) >= 19 
            AND dt BETWEEN DATEADD(HH,19,CONVERT(DATETIME,CONVERT(DATE,@getdate))) AND DATEADD(hh,19,CONVERT(DATETIME,CONVERT(DATE,@getdate))))
/*
dt	amount
2011-01-25 16:30:00.000	2
2011-01-25 08:30:00.000	2
*/

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Author Comment

by:IT SSM
ID: 35267601
Sorry guys I have had one job after another stopping me getting to this. I have tried the suggestions and cannot get either to work for me. They tend to return the table OK just blank.
0
 

Author Comment

by:IT SSM
ID: 35364481
Sharath123
I have managed to get this code working sufficiently for my needs thanks,
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