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What is the most sample and practical way to know the MOM (middle of month) and EOM (end of month) in a stored procedure in SQL Server 2005? (without doing a select case / switch)

EOM is the last day of the month, and MOM is the last day of the fortnight. It seems to be 15 for every month except on February.

Also I need to take care the leap-year, Holidays, business day option, etc. Like linux.

  • Why can you not do CASE? – JNK Jan 23 '12 at 21:04
  • because i don't have the possibilities for leap-year, bussinnes day, not holiday, etc. – MacGyver Jan 23 '12 at 21:08
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For complex date and time functions, use a user defined table-valued function and filter the results from it:

http://weblogs.sqlteam.com/dang/archive/2010/07/19/calendar-table-and-datetime-functions.aspx

There are a number of ways to do this, but this is one I prefer.

  • This can have performance issues as the entire output of the function has to be processed for a join. Query plans involving tvfs can be quite inefficient. – ConcernedOfTunbridgeWells Jan 25 '12 at 9:53
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In a data warehouse with a date dimension it's often common practice to annotate the dimension with this sort of thing. You can use a TVF to generate the initial data but perisisting it in a table will be faster for most purposes. There's no particular reason that this technique could not be applied to a transactional application.

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