Convert time to number in T-SQL

I'm sure this is easy - how do you convert the current date and time into a number in Transact SQL, taking into account split seconds? Quite a few digits if possible as i want to use it as an  ID on an Audit table (not a unique ID though for obvious reasons!)- thanks for looking
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TimCotteeHead of Software ServicesCommented:
You can cast it:

select cast(getdate() as decimal(18,13))

For example. The larger the precision/scale, the finer the resolution of the result.

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Aneesh RetnakaranDatabase AdministratorCommented:
Ashish PatelCommented:
just an addition in above query

SELECT Cast(REPLACE(REPLACE(REPLACE(CONVERT (VARCHAR,GETDATE(),120),':',''),'-',''),' ','') as Numeric(18,0))
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fuerteventuraAuthor Commented:
Many thanks for all your help, I know have further clarification on what is required - what i need is the following:

on 4th February 2008 at 11:30 and 20 seconds and 30 milliseconds I need an id such as the following:

Can anyone help me get that/ I presume a datepart function may be usefull? I will be awarding points to all of the above as all answer the original question, many thanks again
Aneesh RetnakaranDatabase AdministratorCommented:

Scott PletcherSenior DBACommented:
Instead of:


you should use:



SELECT REPLACE(REPLACE(REPLACE(REPLACE(CONVERT(VARCHAR(16), GETDATE(), 121), '-', ''), ' ', ''), ':', ''), '.', '')

This allows direct sorting and means that new numbers will always be larger than earlier ones.

You can always re-format for display.  Don't allow the desired display format to make you use the wrong internal storage format :-) .
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Microsoft SQL Server

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