Question

I have a table that contains dates, the table can have multiple dates in it. For Example

Date
'2011-01-01'
'2011-03-01'
'2011-06-01'
'2011-11-01'
'2011-12-01'

I also have a table that just has units in it. There will never be duplicate units.

Unit
1
2
3
4
5
6

How do I return all dates for every unit. For example:

Unit           Date
1           '2011-01-01'
1           '2011-03-01'
1            '2011-06-01'
1            '2011-11-01'
1            '2011-12-01'
2           '2011-01-01'
2           '2011-03-01'
2            '2011-06-01'
2            '2011-11-01'
2            '2011-12-01'

and so on…..

Answer 1

Using CROSS JOIN

http://msdn.microsoft.com/en-us/library/ms190690.aspx

SELECT d.[Date]
       ,u.[Unit]
FROM [Date_Table] d
CROSS JOIN [Unit_Table] u

Query assumes Date column is in Date_Table, and Unit column is in Unit_Table