Need DateTime format and count of records

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Need DateTime format and count of records

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srisagar_p

Posted Monday, October 25, 2010 6:19 AM

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Last Login: Friday, November 16, 2012 4:16 AM
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Hi all,

I need small query which determines DateTime and count of records of a table.

Example:
Table1: this table has records like this:
13/01/2010(DD/MM/YYYY)
01/13/2010(MM/DD/YYYY)
14/04/2001(DD/MM/YYYY)
11/03/2002(MM/DD/YYYY)
2010/01/01(YYYY/MM/DD)
the result should be like this:

datetime count
----------------------
DD/MM/YYYY 2
MM/DD/YYYY 2
YYYY/MM/DD 1

Can any one help on this.

Thank you all
Waiting for your good response..

Post #1009933

ChrisM@Work

Posted Monday, October 25, 2010 6:34 AM

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Last Login: 2 days ago @ 9:27 AM
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CREATE TABLE #Sample (MyStuff VARCHAR(22))
INSERT INTO #Sample (MyStuff)
SELECT '13/01/2010(DD/MM/YYYY)' UNION ALL
SELECT '01/13/2010(MM/DD/YYYY)' UNION ALL
SELECT '14/04/2001(DD/MM/YYYY)' UNION ALL
SELECT '11/03/2002(MM/DD/YYYY)' UNION ALL
SELECT '2010/01/01(YYYY/MM/DD)'

SELECT RIGHT(MyStuff, 12), COUNT(*) 
FROM #Sample
GROUP BY RIGHT(MyStuff, 12)

^{“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

Post #1009941

parthi-1705

Posted Monday, October 25, 2010 7:26 AM

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Last Login: Wednesday, December 26, 2012 11:03 PM
Points: 586, Visits: 2,195

srisagar_p (10/25/2010)

Hi
My understanding is
This are the formates you have given, these things you will not store in the database
MM/DD/YYYY or YYYY/MM/DD

CREATE TABLE #Sample1 (MyStuff VARCHAR(22))
INSERT INTO #Sample1 (MyStuff)
SELECT '13/01/2010' UNION ALL
SELECT '01/13/2010' UNION ALL
SELECT '14/04/2001' UNION ALL
SELECT '11/03/2002' UNION ALL
SELECT '2010/01/01'

Select MyStuff,case when RIGHT (left(MyStuff, 3),1) ='/' then 2 else 1 end [count] from #Sample1

DROP TABLE #Sample1

Thanks
Parthi

Thanks
Parthi

Post #1009974

CELKO

Posted Monday, October 25, 2010 1:26 PM

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Last Login: Tuesday, January 15, 2013 11:11 AM
Points: 1,945, Visits: 2,782

There is no way to do this, since many of the rows will be ambiguous. Is "12/11/2010" in December or November?

I would suggest that you make a table keyed on the calendar date for the range you need to cleanup, then have the various display strings for that date in separate columns. You can build this with a spreadsheet in a minute or two.

Do the joins and keep only the rows with a unique match. I have no idea how to fix ambiguous data.

Next, fire the guy who let you store temporal data as CHAR(n) instead of DATE. Now fix the table; bad DDL destroys everything.

Books in Celko Series for Morgan-Kaufmann Publishing
Analytics and OLAP in SQL
Data and Databases: Concepts in Practice
Data, Measurements and Standards in SQL
SQL for Smarties
SQL Programming Style
SQL Puzzles and Answers
Thinking in Sets
Trees and Hierarchies in SQL

Post #1010332

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