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Query to get Last month's Data


Query to get Last month's Data

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ssismaddy
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Hi...I have a requirement, A stored proc will be scheduled to run some day in a month. It has to get the data for the last month when ever it is scheduled to run. For example, the table name is tblTime and Column name is DateCol which is of Datetime datatype....now

If we execute it in March, we have to get data for Febraury....

select * from tblTime where dateCol between '2008-02-01' and '2008-02-28'....Is there anyway to get this dynamically?? any help would be appreciated.....Thank you
Jeff Moden
Jeff Moden
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WHERE yourdatecolumn >= DATEADD(mm,DATEDIFF(mm,0,GETDATE())-1,0)
AND yourdatecolumn < DATEADD(mm,DATEDIFF(mm,0,GETDATE()),0)


--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.
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Jeff Moden
Jeff Moden
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Oh yeah..l. I forgot. Never use BETWEEN for date comparisons of this nature because you never know when someone is going to include a time in the column along with the date.

--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.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
How to post code problems
How to post performance problems
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ssismaddy
ssismaddy
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wow...Thank you very much for your quick reply....This is perfect...and Thanks a lot for your valuable suggestion ...I got it....
Jeff Moden
Jeff Moden
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You bet... thanks for the feedback. Smile

--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.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
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rderisala1
rderisala1
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That helps..
Thanks a lot..
Jeff Moden
Jeff Moden
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rderisala1 (3/21/2014)
That helps..
Thanks a lot..

You bet. Thank you for the feedback.

--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.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
How to post code problems
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hrothenb
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DECLARE @PreviousMonthStart DATETIME
DECLARE @PreviousMonthEnd DATETIME

SET @PreviousMonthStart = DATEADD(m,DATEDIFF(m,0,GETDATE())-1,0)
SET @PreviousMonthEnd = DATEADD(ms,-2,DATEADD(month, DATEDIFF(month, 0, GETDATE()), 0))

PRINT @PreviousMonthStart
PRINT @PreviousMonthEnd


SELECT * FROM MyTable
WHERE MyDate >= @PreviousMonthStart
AND MyDate < @PreviousMonthEnd



Jacob Wilkins
Jacob Wilkins
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Careful, that won't be guaranteed to be correct if the data is ever changed to datetime2 with a higher precision than datetime.

Might as well use Jeff's, which will work regardless of the data type.

DECLARE @PreviousMonthStart DATETIME
DECLARE @PreviousMonthEnd DATETIME

SET @PreviousMonthStart = DATEADD(m,DATEDIFF(m,0,GETDATE())-1,0);
SET @PreviousMonthEnd = DATEADD(ms,-2,DATEADD(month, DATEDIFF(month, 0, GETDATE()), 0));

PRINT @PreviousMonthStart;
PRINT @PreviousMonthEnd ;


CREATE TABLE #MyTable (MyDate datetime2(3), some_string varchar(100));

INSERT INTO #MyTable VALUES
('20160301 12:39:10.898','This one is fine.'),
('20160331 23:59:59.999','What about me? Sniff sniff');


--This one is only guaranteed to return
--correct results for datetime

SELECT * FROM #MyTable
WHERE MyDate >= @PreviousMonthStart
AND MyDate < @PreviousMonthEnd;

--Jeff's will always work

SELECT * FROM #MyTable
WHERE MyDate >= DATEADD(mm,DATEDIFF(mm,0,GETDATE())-1,0)
AND MyDate < DATEADD(mm,DATEDIFF(mm,0,GETDATE()),0);

DROP TABLE #MyTable;



Cheers!
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