Sql server 为了减少工作和错误，我们称之为“提高效率”，而不是“懒惰”。干得好。@kuru在某些情况下我不太确定。这里没有太多的键入操作，只需从对象资源管理器中拖动列列表即可。并且在代码中显式列出列名可以防止以后在表结构更改（添加列等）时调试噩梦。你可以说相反的说法是

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为了减少工作和错误，我们称之为“提高效率”，而不是“懒惰”。干得好。@kuru在某些情况下我不太确定。这里没有太多的键入操作，只需从对象资源管理器中拖动列列表即可。并且在代码中显式列出列名可以防止以后在表结构更改（添加列等）时调试噩梦。你可以说相反的说法是正确的（例如，一列被删除），但前者是一种更常见的情况。@Aaron——OP问。。。我倾向于分享你关于列出来的好处的一般技术观点，但无论如何，这是对TSQL的一般批评（例如，为什么它允许你在某些情况下不列出来，并迫使你在其他情况下列出来），而不是对OP的个人批评。此外，在某些情况下，您提到的问题不会带来风险——我们无法从OP提供的有限信息中得知。头脑发热的垃圾（HLGEM称OP为懒惰和不专业，只是为了问问题）在任何方面都不是建设性的。@kuru我同意，我只是不同意这样的概括，即少打字总是能提高效率。是的，在某些情况下这是正确的，但也有一些情况下，你只是将付款推迟到稍后，稍后可能是凌晨3点，因为部署导致系统停机。当然，我对脚本进行了更多的自定义，但这太棒了！6年后，这仍然在帮助人们。。

MERGE INTO target AS t
USING source AS s          
WHEN MATCHED THEN
    UPDATE SET
    [all t.fields = s.fields]
WHEN NOT MATCHED THEN 
      INSERT ([all fields])
      VALUES ([all s.fields])

    CREATE PROCEDURE [dbo].[GenerateMergeSQL]
    @TableName varchar(100)
AS
BEGIN
    SET NOCOUNT ON 

    declare @sql varchar(5000),@SourceInsertColumns varchar(5000),@DestInsertColumns varchar(5000),@UpdateClause varchar(5000)
    declare @ColumnName varchar(100), @identityColName varchar(100)
    declare @IsIdentity int,@IsComputed int, @Data_Type varchar(50)

    declare @SourceDB as varchar(200)


    -- source/dest i.e. 'instance.catalog.owner.' - table names will be appended to this
    -- the destination is your current db context
    set @SourceDB = '[mylinkedserver].catalog.myDBOwner.'

    set @sql = ''
    set @SourceInsertColumns  = ''
    set @DestInsertColumns  = ''
    set @UpdateClause  = ''
    set @ColumnName  = ''
    set @isIdentity = 0
    set @IsComputed = 0
    set @identityColName  = ''
    set @Data_Type  = ''


DECLARE @ColNames CURSOR
SET @ColNames = CURSOR FOR 
    select column_name, COLUMNPROPERTY(object_id(TABLE_NAME), COLUMN_NAME, 'IsIdentity') as IsIdentity ,
        COLUMNPROPERTY(object_id(TABLE_NAME), COLUMN_NAME, 'IsComputed') as IsComputed , DATA_TYPE
    from information_schema.columns where table_name = @TableName order by ordinal_position

OPEN @ColNames
FETCH NEXT FROM @ColNames INTO @ColumnName, @isIdentity, @IsComputed, @DATA_TYPE

WHILE @@FETCH_STATUS = 0
    BEGIN
        if @IsComputed = 0 and @DATA_TYPE <> 'timestamp'
        BEGIN
            set @SourceInsertColumns = @SourceInsertColumns + 
                case when @SourceInsertColumns = '' THEN '' ELSE ',' end +
                'S.' + @ColumnName

            set @DestInsertColumns = @DestInsertColumns + 
                case when @DestInsertColumns = '' THEN '' ELSE ',' end +
                @ColumnName

            if @isIdentity = 0
            BEGIN
                set @UpdateClause = @UpdateClause + 
                case when @UpdateClause = '' THEN '' ELSE ',' end
                 + @ColumnName + ' = ' + 'S.' + @ColumnName + char(10)
            END

            if @isIdentity = 1 set @identityColName = @ColumnName
        END

        FETCH NEXT FROM @ColNames INTO @ColumnName, @isIdentity, @IsComputed, @DATA_TYPE
    END

CLOSE @ColNames
DEALLOCATE @ColNames

    SET @sql = 'SET IDENTITY_INSERT ' + @TableName + ' ON;
            MERGE ' + @TableName + ' AS D
                USING ' + @SourceDB + @TableName + ' AS S
                ON (D.' + @identityColName + ' = S.' + @identityColName + ')
            WHEN NOT MATCHED BY TARGET
                THEN INSERT(' + @DestInsertColumns + ') 
                VALUES(' + @SourceInsertColumns + ')
            WHEN MATCHED 
                THEN UPDATE SET 
                    ' + @UpdateClause + '
            WHEN NOT MATCHED BY SOURCE
                THEN DELETE
            OUTPUT $action, Inserted.*, Deleted.*;
            SET IDENTITY_INSERT ' + @TableName + ' OFF'

    Print @SQL

END

--Two statement run as transaction batch
DELETE
    C
FROM
    productschina C
    JOIN 
    (select * from productschina c except select * from productsus) z
    on c.productid=z.productid

INSERT into productschina select * from productsus except select * from productschina

--Create a target table
--drop table ProductsUS
CREATE TABLE ProductsUS
(
ProductID INT PRIMARY KEY,
ProductName VARCHAR(100),
Rate MONEY
) 
GO
--Insert records into target table
INSERT INTO ProductsUS
VALUES
(1, 'Tea', 10.00),
(2, 'Coffee', 20.00),
(3, 'Muffin', 30.00),
(4, 'Biscuit', 40.00)
GO
--Create source table
--drop table productschina
CREATE TABLE ProductsChina
(
ProductID INT PRIMARY KEY,
ProductName VARCHAR(100),
Rate MONEY
) 
GO
--Insert records into source table
INSERT INTO ProductsChina
VALUES
(1, 'Tea', 10.00),
(2, 'Coffee', 25.00),
(3, 'Muffin', 35.00),
(5, 'Pizza', 60.00)
GO
SELECT * FROM ProductsUS
SELECT * FROM ProductsChina
GO

DELETE
    C
FROM
    productschina C
    JOIN 
    (select primary_key, last_mod_date from productschina c except select primary_key, last_mod_date from productsus) z
    on c.productid=z.productid

INSERT into productschina select * from productsus except select * from productschina