WITH AS短语，也叫做子查询部分（subquery factoring）

可以让你做很多事情，定义一个SQL片断，该SQL片断会被整个SQL语句所用到。

作为提供数据的部分。

 

代码例子：

 1 with temp as

 2  (select ID, Type_Name, Type_ID

 3     from T_Base_GoodsType as t

 4    where t.Shop_ID = @shop_id

 5      and Type_ID = @Goods_TypeID

 6   union all

 7   select t1.ID, t1.Type_Name, t1.Type_ID

 8     from T_Base_GoodsType as t1

 9    inner join temp

10       on t1.ParentType_ID = temp.Type_ID

11    where t1.Shop_ID = @shop_id)

12 select *

13   from (select Stock_Amount,

14                S.StockWarn_Amount,

15                S.All_Amount,

16                G.Goods_ID,

17                G.Goods_Name,

18                G.Goods_Unit,

19                ROW_NUMBER() over(order by Stock_Amount desc) as rowid

20           from T_IM_StockInfo as S

21          inner join T_Base_GoodsInfo AS G

22             on S.Goods_ID = G.Goods_ID

23          inner join temp

24             on temp.Type_ID = G.Goods_TypeID

25          where S.Shop_ID = @shop_id

26            AND G.Shop_ID = @shop_id

27            and G.Goods_TypeID = temp.Type_ID

28          group by S.Stock_Amount,

29                   S.All_Amount,

30                   G.Goods_ID,

31                   G.Goods_Name,

32                   G.Goods_Unit,

33                   S.StockWarn_Amount

34         HAVING SUM(S.Stock_Amount) < S.StockWarn_Amount) m

35  WHERE rowid between @pageindex and @pagesize

View Code

 

参考：sql with as 用法