Sql 当源于三个源列时，从目标列返回输出

我有一个源表和一个目标表，我的源表有三列组成我的目标列。我的目标列是电话，源列是工作号码、手机号码、家庭号码。当我查找客户帐户时，我希望在destination列中看到customerNumber。因此，基本上，我的三个源列中的所有内容都应该在我的一个目标列中，并带有各自的客户帐户。是否可以通过t-sql或ssis将目标列设置为三个源列？

请提供示例数据、预期结果和尝试。文字可能会很混乱。

DECLARE @CustomerId INT 

DECLARE cur_insert_phone CURSOR FOR 
SELECT CustomerId FROM SourceDatabase.Schema.SourceTable 
ORDER BY CustomerId

OPEN cur_insert_phone

FETCH NEXT FROM cur_insert_phone INTO @CustomerId

WHILE @@FETCH_STATUS = 0 

BEGIN
    INSERT INTO DestinationDatabase.Schema.SourceTable (CustomerId, CustomerNumber, PhoneType)

    SELECT t.CustomerId, t.PhoneNumber, t.PhoneType
    FROM
    (SELECT CustomerId, WorkNumber,CellNumber,HomeNumber FROM SourceDatabase.Schema.SourceTable WHERE CustomerId = @CustomerId) p
    UNPIVOT 
        (
            PhoneNumber FOR PhoneType IN (WorkNumber,CellNumber,HomeNumber)
        ) AS t 

    FETCH NEXT FROM cur_insert_phone INTO @CustomerId

END

CLOSE cur_insert_phone
DEALLOCATE cur_insert_phone
GO