Question

如何将列合并到一个表中？

declare @map_old table(ID int not null) 
insert into @map_old select 1
insert into @map_old select 2

declare @map_new table(ID int not null) 
insert into @map_new select 11
insert into @map_new select 22

declare @map(ID int not null, ID2 int not null)

@map中的结果应为：

ID   ID2
1    11
2    22

有什么建议吗？ THX！

Answer 1

您可以在表格中使用身份，如下所示：

declare @map_old table(iden int identity,ID int not null) 
insert into @map_old select 1
insert into @map_old select 2

declare @map_new table(iden int identity,ID int not null) 
insert into @map_new select 11
insert into @map_new select 22

declare @map table(ID int not null, ID2 int not null)

insert into @map
select t.ID, t2.ID from @map_old t join @map_new t2 on  t.iden = t2.iden

Answer 2

如果您确定此表具有相同的行数。

然后可能是这样的：

;WITH CTE
AS
(
    SELECT
        ROW_NUMBER() OVER(ORDER BY ID) AS RowNbr,
        mapNew.ID
    FROM
        @map_new AS mapNew
),CTE2
AS
(
    SELECT
        ROW_NUMBER() OVER(ORDER BY ID) AS RowNbr,
        mapOld.ID
    FROM
        @map_old AS mapOld
)
INSERT INTO @map(ID,ID2)
SELECT
    CTE.ID,
    CTE2.ID
FROM
    CTE
    JOIN CTE2
        ON CTE.RowNbr=CTE2.RowNbr

SELECT * FROM @map

tsql将列合并到一个表中

2 个答案: