如何在T-SQL中实现ZIP JOIN？

Question

假设我有桌子#Foo:

Id Color
-- ----
1  Red
2  Green
3  Blue
4  NULL

和表#Bar:

Value
-----
1
2.5

我想创建表Result使用简单的语句来获取:

Id Color   Value
-- ----   -----
1  Red    1
2  Green  2.5
3  Blue   NULL
4  NULL   NULL

到目前为止我发明的是:

WITH cte1
AS
(
    SELECT [Id], [Color], ROW_NUMBER() OVER (ORDER BY [Id]) AS 'No'
    FROM #Foo
),
cte2
AS
(
    SELECT [Value], ROW_NUMBER() OVER (ORDER BY [Value]) AS 'No'
    FROM #Bar
)
SELECT [Id], [Color], [Value]
FROM cte1 c1
FULL OUTER JOIN cte2 c2 ON c1.[No] = c2.[No]

您是否知道在T-SQL中进行ZIP JOIN的更快或更标准的方法？

Answer 1

您可以摆脱the CTE或使您的query shorter

子查询是这样的

select Id,Color,Value from 
(
    SELECT [Id], [Color], ROW_NUMBER() OVER (ORDER BY [Id]) AS 'No'
    FROM #Foo
)x full outer join 
(
    SELECT [Value], ROW_NUMBER() OVER (ORDER BY [Value]) AS 'No'
    FROM #Bar
)y
on x.No=y.No