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Why does my yesterday query return no results?


Why does my yesterday query return no results?

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jerome.morris
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Hi all I have a datetime column in my DB and I am trying to fetch all records from yesterday using

SELECT *from SLADB.dbo.DocketTB
WHERE Docket_Date = (GETDATE() - 1)


but is always returns no results and I no the data is there

2012-09-22 21:33:39.390

is this because of the time ?


Thanks
jerome.morris
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where Docket_Date = DATEADD(d,DATEDIFF(d,0,GETDATE()),0)-1
ChrisM@Work
ChrisM@Work
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Try casting both sides of the comparison as date:

WHERE CAST(Docket_Date AS DATE) = CAST(GETDATE() AS DATE) - 1

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
jerome.morris
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Operand type clash: date is incompatible with int


Is it the time thats causing the problem ?
jerome.morris
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SELECT *from SLADB.dbo.DocketTB


where Docket_EngFinish >=dateadd(d,datediff(d,0, getdate()),-1) AND Docket_EngFinish<dateadd(d,datediff(d,0, getdate()),0)


This works, is there a better way ?

Thanks again Chris :-)
ChrisM@Work
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jerome.morris (10/23/2012)
SELECT *from SLADB.dbo.DocketTB


where Docket_EngFinish >=dateadd(d,datediff(d,0, getdate()),-1) AND Docket_EngFinish<dateadd(d,datediff(d,0, getdate()),0)


This works, is there a better way ?

Thanks again Chris :-)


Yes - cast both sides as DATE

where CAST(Docket_EngFinish AS DATE) = CAST(GETDATE() AS DATE) - 1

Does Docket_EngFinish have a time component or is it all 0's?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
jerome.morris
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It has a time stamp also and the cast gave me the error

Operand type clash: date is incompatible with int
ChrisM@Work
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Oops...

CAST(GETDATE() -1 AS DATE)

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
kupy
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Hi

Did you try DATEDIFF(day, Docket_EngFinish , getdate())=1 ?
The datediff by day checks only the day part and not the time.
http://msdn.microsoft.com/en-us/library/ms189794.aspx
Jeff Moden
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ChrisM@Work (10/23/2012)
Yes - cast both sides as DATE


I don't believe so, Chris... no chance of getting an index seek that way.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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