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How do you access sysdate and current time in stored procedure  SQL server

Posted on 2009-04-10
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Last Modified: 2012-06-21
I have stored procedure which runs wvery hour. However every hour I need to dynam,ixally change date/time,. I need two cases
a. Run query for previous day to concompass the whole day
select * from Table where dateTime>=(sysdate-1):0000 and dateTime=(sysdate-1):2359

b. I need a query which looks for anything for the past one hour for today

select * from Table where dateTime>=sysdate-1:currentime and dateTime<=sysdate:currentime -1  (past one hour)




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Question by:rheasam
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12 Comments
 
LVL 60

Expert Comment

by:chapmandew
ID: 24119077
a.
select * from tablename
where datefield >= cast(convert(varchar(10), dateadd(d, -1, getdate(), 101)  as datetime)
and datefield < cast(convert(varchar(10), getdate(), 101) as datetime)

b.
select * from tablename
where datefield >= cast(convert(varchar(10), dateadd(h, -1, getdate(), 101)  as datetime)

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LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 24119083
in sql server the date+time (aka now) is available from GETDATE()


select * from Table 
  where dateTime>=dateadd(day, -1, getdate())
    and dateTime<=dateadd(hour,-1, getdate())

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Expert Comment

by:8080_Diver
ID: 24119740
If you happen to be using SQL Server 2008, you can make use of the new Date datatype to accept the dateadd(day, -1, getdate()) value from angelIII's solution for the "yesterday" portion of the problem and then match based upon your dates being between that value and that value + 1.
If you are not on SS2008, you can make use of the fact that the dates are integers and the times are fractions in a double datatype.  (See SQL_1 below)
If you want the process to check for exactly and precisely datetimes during the hour immediately preceding the execution, angelIII's solution is your answer for the second half of the problem.

SQL_1:
 
DECLARE @Yesterday AS DateTime;
DECLARE @ToDay AS INT;
DECLARE @INTTIME AS INT;
DECLARE @LastHour AS Datetime;
DECLARE @ThisHour AS Datetime;
 
 
 
SET @Yesterday = CAST(CAST(GETDATE() AS INT) AS DATETIME);
SET @ToDay = CAST(Cast(GETDATE() AS INT) AS DATETIME
 
SELECT @ThisHour = 
       CAST(CONVERT(VARCHAR(02), JustTime, 108) AS INT)FROM
(SELECT GETDATE() - CAST(INTDATE AS DATETIME) AS JustTime,
        INTDATE
FROM
(SELECT CAST(GetDate() AS INT) AS INTDATE
) X
) Y;
 
SET @LastHour = @ThisHour - 1;
 
 
SELECT * 
FROM Table 
WHERE CAST(DateTimeColmun as INT) BETWEEN @YESTERDAY AND (@YESTERDAY + 1);
 
SELECT *
FROM Table
WHERE DateTimeColmun >= (@Today + @LastHour) 
  AND DateTimeColumn <  (@Today + @ThisHour)
 

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Author Comment

by:rheasam
ID: 24127529
k, thanks guys, I am checking into the solution and will award points in next couple of days.
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Author Comment

by:rheasam
ID: 24129958
angellll
select * from Table
  where dateTime>=dateadd(day, -1, getdate())
    and dateTime<=dateadd(hour,-1, getdate())

does not giove me all records from last one day ie
I need records from
select * from Table
and dateTime > '04/12/09 00:00'
and dateTime < '04/13/09 09:00' (assuming 09:00 is the current time)

How can I add the 00:00 to the above query

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LVL 60

Assisted Solution

by:chapmandew
chapmandew earned 300 total points
ID: 24130018
did you try my first post?

select * from tablename
where datefield >= cast(convert(varchar(10), dateadd(d, -1, getdate(), 101)  as datetime)
and datefield < cast(convert(varchar(10), getdate(), 101) as datetime)

0
 

Author Comment

by:rheasam
ID: 24131106
chap, that did not work. It gave me following error:
Server: Msg 174, Level 15, State 1, Line 21
The dateadd function requires 3 arguments.
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LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 24131183
there is some () misplaced..

select * from tablename
where datefield >= convert(datetime, convert(varchar(10), dateadd(d, -1, getdate()), 120), 120)
and datefield < getdate() 

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Expert Comment

by:chapmandew
ID: 24131197
WHOOPS:

select * from tablename
where datefield >= cast(convert(varchar(10), dateadd(d, -1, getdate()), 101)  as datetime)
and datefield < cast(convert(varchar(10), getdate(), 101) as datetime)
0
 

Author Comment

by:rheasam
ID: 24132024
amgelll your qyery seems to be working ok, how can modify this for just looking back for past one hour.

Chap, your query is returning only rows for past one day, not for today
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Expert Comment

by:chapmandew
ID: 24132146
>>Chap, your query is returning only rows for past one day, not for today
Sorry, i  thought that is what you wanted.
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LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 1200 total points
ID: 24133284
back 1 hour:
select * from tablename
where datefield >= dateadd(hour, -1, getdate()) 
and datefield < getdate() 

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