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Get DATE part of the DATETIME


Get DATE part of the DATETIME

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ChrisM@Work
ChrisM@Work
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DECLARE @TheDate DATETIME
SET @TheDate = '2008-02-05 23:59:59.997'
SELECT @TheDate
SELECT CAST(CAST(@TheDate-0.5000000385803 AS INT) AS DATETIME)
SET @TheDate = '2008-02-05 00:00:00.000'
SELECT CAST(CAST(@TheDate-0.5000000385803 AS INT) AS DATETIME)
Wink

We're still on 2K, could be decades before we see 2K8 Sick

“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
bc_
bc_
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it doesn't wait until noon to start rounding up...

DECLARE @TheDate DATETIME

SET @TheDate = '2008-02-05 11:59:59.993'
SELECT @TheDate
SELECT CAST(@TheDate AS INT)
SELECT CAST(CAST(@TheDate AS INT) AS DATETIME)

SET @TheDate = '2008-02-05 11:59:59.997'
SELECT @TheDate
SELECT CAST(@TheDate AS INT)
SELECT CAST(CAST(@TheDate AS INT) AS DATETIME)

bc
ChrisM@Work
ChrisM@Work
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DECLARE @TheDate DATETIME, @HalfDayAndaBit DECIMAL (14,13)
SET @HalfDayAndaBit = 0.5000000385803

SET @TheDate = '2008-02-05 11:59:59.993'
SELECT @TheDate
SELECT CAST(@TheDate-@HalfDayAndaBit AS INT)
SELECT CAST(CAST(@TheDate-@HalfDayAndaBit AS INT) AS DATETIME)

SET @TheDate = '2008-02-05 11:59:59.997'
SELECT @TheDate
SELECT CAST(@TheDate-@HalfDayAndaBit AS INT)
SELECT CAST(CAST(@TheDate-@HalfDayAndaBit AS INT) AS DATETIME)

That's where the 'AndaBit' comes in.

“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
Ryan Davidson
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If you don't care about the date coming back as an string. Then this is good solution too.

PRINT LEFT(getdate(), 11)
dbajunior
dbajunior
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or...

Select convert(char(10),getdate(),101)
Julie Breutzmann
Julie Breutzmann
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Thanks for a helpful article. Good discussion, too!

Julie
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James A. Lawrence (2/5/2008)
or...

Select convert(char(10),getdate(),101)

Of course I'd use convert(char(10),getdate(),103)...

Which raises a question I haven't found an answer to:

Why does America (and nowhere else) write dates in their traditional order, i.e. month/day/year?

Everywhere else has a date order which either goes from specific to general (day-month-year) or the reverse (y-m-d). Why does America use a medium-small-large (m-d-y) ordering such that a mechanical 'odometer' would have to update the middle section first, then the left end, then the right end rather than the more logical left-to-right or right-to-left?

Derek
jcrawf02
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why am I getting times in the result for all of these, when I want only the date portion?

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Sean Walker
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That'd be because the data type is dateTIME.
If you want just date, convert to SQL 2K8 and use a date only datatype, or as previous example above have done, convert to a char data type with only the date portion being returned.
ChrisM@Work
ChrisM@Work
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jcrawf02 (2/6/2008)
why am I getting times in the result for all of these, when I want only the date portion?


Curious - can you post what you've tried, with the results?

“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
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