how to change the date value to null??

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Home » SQL Server 2008 » T-SQL (SS2K8) » how to change the date value to null??

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how to change the date value to null??

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Posted Friday, August 17, 2012 3:07 AM

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hi ,

I have a column with date datatype. i updated the column with some date like 02-02-2012 00.00.000 ,for 100 orders Now i want to change the value for those 100 orders to NULL . how can i change ???

Thanks
lavanya

Post #1346409

Posted Friday, August 17, 2012 3:16 AM

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Lavanyasri (8/17/2012)

hi ,

I have a column with date datatype. i updated the column with some date like 02-02-2012 00.00.000 ,for 100 orders Now i want to change the value for those 100 orders to NULL . how can i change ???

Thanks
lavanya

Looks like a datetime datatype?

Do any orders other than the 100 you've just changed have the same value in the column?
Do you have auditing columns on the table (e.g. LastModifiedDatetime, LastModifiedBy)?

^{“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 #1346412

Posted Friday, August 17, 2012 3:22 AM

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no , i want to change those orders value to null [that column data type is datetime ]

Post #1346416

Posted Friday, August 17, 2012 3:23 AM

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Lavanyasri (8/17/2012)

hi ,

I have a column with date datatype. i updated the column with some date like 02-02-2012 00.00.000 ,for 100 orders Now i want to change the value for those 100 orders to NULL . how can i change ???

Thanks
lavanya

Are these 100 orders can be identified as WHERE [column] = '20120202' or this one will return more than 100 orders you want to set to NULL?

_____________________________________________
"The only true wisdom is in knowing you know nothing"
"O skol'ko nam otkrytiy chudnyh prevnosit microsofta duh!" BigGrin

BigGrin

(So many miracle inventions provided by MS to us...)

How to post your question to get the best and quick help

Post #1346418

Posted Friday, August 17, 2012 3:34 AM

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table name :xyz coulumname is :submitdate datatype is : datetime

Initially submitdate by default is null

i updated the column for 100 orders to '02-02-2012 00.00.000'

update xys set submitdate='02-02-2012 00.00.000' where id in ('1','2'.........'100')

Now i want to revert back those 100 orders submitdate value to null .

Post #1346425

Posted Friday, August 17, 2012 3:36 AM

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table name :xyz coulumname is :submitdate datatype is : datetime

Initially submitdate by default is null

i updated the column for 100 orders to '02-02-2012 00.00.000'

update xys set submitdate='02-02-2012 00.00.000' where id in ('1','2'.........'100')

Now i want to revert back those 100 orders submitdate value to null .

Post #1346426

Posted Friday, August 17, 2012 3:40 AM

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This sounds a really simplistic question, but based on what you've said, it should just be:

update xys set submitdate=NULL where id in ('1','2'.........'100')

I feel I must be missing something as surely if you know how to set the rows to one value, you know how to set it to another...

Post #1346429

Posted Friday, August 17, 2012 3:42 AM

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HowardW (8/17/2012)

This sounds a really simplistic question, but based on what you've said, it should just be:

update xys set submitdate=NULL where id in ('1','2'.........'100')

I feel I must be missing something as surely if you know how to set the rows to one value, you know how to set it to another...

If I could find an emoticon for perplexed, it would be right here!

^{“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 #1346430

Posted Friday, August 17, 2012 3:51 AM

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ChrisM@Work (8/17/2012)

HowardW (8/17/2012)

This sounds a really simplistic question, but based on what you've said, it should just be:

update xys set submitdate=NULL where id in ('1','2'.........'100')

I feel I must be missing something as surely if you know how to set the rows to one value, you know how to set it to another...

If I could find an emoticon for perplexed, it would be right here!

Let me guess: OP has closed the window with the list of real id's he updated

... where id in ('1','2'.........'100')

Now he tries to get it back from us...

My question was: would the query SELECT * FROM orders WHERE SubmittedDate = '20120202' return 100 records or else?

_____________________________________________
"The only true wisdom is in knowing you know nothing"
"O skol'ko nam otkrytiy chudnyh prevnosit microsofta duh!" BigGrin

BigGrin

(So many miracle inventions provided by MS to us...)

How to post your question to get the best and quick help

Post #1346435

Posted Friday, August 17, 2012 4:01 AM

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Thanks to all

Post #1346445

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