Question

我有两个略有不同的表：

表1：

    Sm Reads Oct
Install, Date, Con, MT

表2：

Sm Reads
Contract, Inst, Read T, Date

新表：

Sm Reads Master
Contract, Install, Date, Type

代码：

CREATE TABLE [Sm Reads Master]
(
    [Contract] FLOAT,
    [Install] FLOAT,
    [Date] DateTime,
    [Type] NVARCHAR (3)
)
GO

INSERT INTO [Sm Reads Master]
SELECT  *
FROM    (
        SELECT * FROM [Sm Reads Oct]
        UNION
        SELECT * FROM [Sm Reads]
        ) LU

我想它不喜欢这两个表有不同的字段名和不同数据的事实，所以甚至可以这样做吗？

感谢您的帮助。

（第一个表中的MT与第二个表中的读取T的数据相同）

Answer 1

您需要相同的列名（和类型）：

INSERT INTO [Sm Reads Master]
SELECT * FROM   
FROM    (
        SELECT  Contract = Con,
                Install  = Inst, 
                Date,
                Type     = MT
        FROM [Sm Reads Oct]

        UNION

        SELECT  Contract,
                Install, 
                Date,
                Type
        FROM [Sm Reads]
        ) LU

Answer 2

您的联合查询不正确.Column Name必须相同且序列相同

尝试以下脚本：

INSERT INTO [Sm Reads Master] ([Contract],[Install],[Date],[Type])
SELECT [Contract] = Con,
                [Install]  = Inst, 
                [Date],
                [Type]     = MT
        FROM [Sm Reads Oct]

        UNION

        SELECT  [Contract],
                [Install], 
                [Date],
                [Type]
        FROM [Sm Reads]

SQL Server合并两个表

2 个答案: