Storing just Month and Year in SQL Server 2008?

Sql Server will store the datetime data in its entirety (year-month-day hour:min:sec.milliSec) no matter what.

When you store your dates, you can make the day the 1st of the month. Just format the dates how you want when you do your queries.

http://www.sql-server-helper.com/tips/date-formats.aspx

Without knowing the intended use, it is not possible to advise correctly. However, storing month and year is easily done in at least three ways:

• use a date field, but always store into it the first day of the month at midnight; then always custom format the date field for display
• add integer year and month fields, and populate them by splitting a date
• add an integer field where you encode it as year * 100 + month or some other useful scheme