Snabbaste sättet att klona rad i SQL

Du kan köra något liknande den lagrade proceduren nedan för att undvika att skriva ut alla kolumnnamn. Exemplet nedan antar en int, men du kan byta ut nyckeltypen mot vilken datatyp som helst.

create procedure [CloneRow]
    @tableName varchar(max),
    @keyName varchar(max),
    @oldKeyId int,
    @newTableId int output
as
    declare @sqlCommand nvarchar(max),
            @columnList varchar(max);

    select  @columnList = coalesce(@columnList + ',','') + sys.columns.name
    from    sys.columns
    where   object_name(sys.columns.object_id) = @tableName
        and sys.columns.name not in ( @keyName )
        and is_computed = 0;

    set @sqlCommand = 'insert into ' + @tableName + ' ( ' + @columnList + ') (' +
        'select ' + @columnList + ' from ' + @tableName + ' where ' + @keyName + ' = @oldKeyId )'
    exec sp_executesql @sqlCommand, N'@oldKeyId int', @oldKeyId = @oldKeyId
    select @newTableId = @@identity -- note scope_identity() won't work here!
GO

Du kallar det så här:

declare @newOrderId int
exec [CloneRow] 'orderTable', 'orderId', 625911, @newOrderId output