December 2013
Intermediate to advanced
1872 pages
153h 31m
English
book
Microsoft® SQL Server 2012 Unleashed
by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
Content preview from Microsoft® SQL Server 2012 Unleashed
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Why Use User-Defined Functions?
The main benefit of user-defined functions is that you are not limited to just the functions SQL Server provides. You can develop your own functions to meet your specific needs or to simplify complex SQL code. For example, the getdate() function returns the current system date and time. It always includes both a date component and time component, with accuracy down to the milliseconds. What if you wanted to return a datetime value with just the date and have the time always set to midnight? To do this, you would have to pass the result from getdate() through some other functions to zero out the time component. The following is one possible solution:
select convert(datetime, convert(date, ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.