SQL 2005 CTE应用 - 月份表

在一个RS报表中需要实现一年内各月份"报价总额"的统计，但是报价表中并不是每个月都有数据，某些月份没有数据，那么需要一个月份表(1-12月)并使用left join来连接报价表。如何用简单等方法生产一个月份表？


with MonthList(m)
as
(
select m =1
union all
select m + 1 from MonthList where m < 12
)

select m from MonthList

结果：
1
2
3
4
5
6
7
8
9
10
11
12

A common table expression (CTE) can be thought of as a temporary result set that is defined within the execution scope of a single SELECT, INSERT, UPDATE, DELETE, or CREATE VIEW statement. A CTE is similar to a derived table in that it is not stored as an object and lasts only for the duration of the query. Unlike a derived table, a CTE can be self-referencing and can be referenced multiple times in the same query.

http://msdn2.microsoft.com/en-us/library/ms190766.aspx