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convert DateTime to BigInt


convert DateTime to BigInt

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munishprathap
munishprathap
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not lik tht,
values entered in these column was datetime only but in future i need to make entries
only as bigint
ChrisM@Work
ChrisM@Work
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munishprathap (1/20/2009)
not lik tht,
values entered in these column was datetime only but in future i need to make entries
only as bigint


How many rows are currently affected?

“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
munishprathap
munishprathap
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we cant predict no. of rows affected assume tht tables have 10 rows
ChrisM@Work
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munishprathap (1/20/2009)
we cant predict no. of rows affected assume tht tables have 10 rows


How many rows do you have in the table right now?

“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
munishprathap
munishprathap
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Ok thts great
its having 10 rows and one column have DateTime type with values.
steveb.
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munishprathap (1/20/2009)
Ok thts great
its having 10 rows and one column have DateTime type with values.


Do these date-time values mean anything? what are your rules for converting a date to integer while still keeping the same value as you will not be able to put a datetime into an int column..
Jeff Moden
Jeff Moden
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munishprathap (1/19/2009)
Thanks Jeff
according to my requirement i need to keep the one column type as bigint but unfortunately
i keep it as DateTime after long time i found that it was DateTime Type. so i need to write
a Script / Query which updates the Column field type as BigInt from DateTime and set the ID Column as
Identity with primary key.

My Table Script

CREATE TABLE [dbo].Number (
[ID] [BIGINT] NOT NULL,
[LastModifyBy] [DATETIME] NOT NULL)


Please stop and think a minute and I'll give you the answer. What is the purpose of storing a DateTime as a BigInt? I need to know the real reason... not that it's simply a requirement you've been given.

--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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ChrisM@Work
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munishprathap (1/20/2009)
Ok thts great
its having 10 rows and one column have DateTime type with values.


Is this table heavily used at present?

“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
munishprathap
munishprathap
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No
ChrisM@Work
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munishprathap (1/20/2009)
No


If no other students are using it, why don't you simply script a new table using EM and copy the data into it?

“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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