动态数据透视表失败 - 无法弄清楚如何使其工作

Question

我试图创建一个带有PERIOD列作为标题的动态数据透视表 - 这段时间实际上是与月份连接的年份，例如201608

这个一直在绊倒，我尝试了很多我在网上找到的解决方案，并试图完全重新排列几次。

任何人都可以帮助我吗？查询本身非常简单。

DECLARE @query VARCHAR
DECLARE @PERIOD VARCHAR = '201608'
DECLARE @col1 AS VARCHAR


SELECT @col1 = ISNULL(@col1, 0) FROM (SELECT DISTINCT [PERIOD] AS col1 
FROM [DimDate] WHERE LEFT([PERIOD], 4) = LEFT(@PERIOD, 4)) AS [TEST]


SET @query = 
'SELECT * 
    FROM
    (SELECT 1 as NGroup, [PERIOD], MEMBERSHIP_LEVEL, Amount 
          from [NewMember]) AS s
    PIVOT
    (COUNT(Amount) FOR [PERIOD] IN (' + @col1 + ')) AS pvt'
PRINT @query
EXEC @query