Date conversion from mm/dd/yyyy to yyyymmdd in sqlserver 2005

I need convert date in the format mm/dd/yyyy to yyyymmdd
and also mm/dd/yy  to yyyymmdd format.I'm not able to find an appropriate solution for that.
Also how do I convert time in the format represent milli seconds)
to hh:mm:ss:xxxx .
How do I convert time in the format hhmmssx to hh:mm:ss:xxx?
How do I convert time in the format to hh:mm:ss?
How do I convert time in the format hh:mm:ss to hhmmss?
All of these in sql server 2005.
can I get the code if possible?
Please let me know ASAP.

Thanks in advance

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You actually want to change what they are **stored as** or how they are formatted when you select them?
Anthony PerkinsCommented:
Datetime and smalldatetime are not stored in any regional format.  In order to convert for display purposes to some typical formats, take a look at the CONVERT() function in BOL
Use the Convert function in SQL to convert the date format according to your choice.
You can specify the <Style> tag according to your choice.
For eg:- convert (datetime, <Column Name>, 112 ) will give you the format yyyymmdd
Like wise you can get different formats.
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amuktaAuthor Commented:
Hi! Doc McAlister,

I want to change the formatwhile selecting them.
amuktaAuthor Commented:
Hi! ursangel,

Unable to do it with the solutio u've sent me, for soem reason.
Is there any other alternative.

Anthony PerkinsCommented:
>>Unable to do it with the solutio u've sent me, for soem reason.<<
Try posting your query and we can be more specific.

>>Is there any other alternative.<<
There is no other alternative with T-SQL.
More information is here:

Select convert(datetime, columnName, 112) From tableName

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