Sql server 按id查询表，如果不存在，请选择默认值

我有一个具有以下结构的表：

我想检索与特定ProductId和ReportType匹配的所有行。现在是踢球者。并非所有ReportType/TextBockType组合的所有ProductID都存在。但是，始终存在ProductId为0的值。ProductId为0表示默认值

换句话说：如果不存在具有特定ProductId/ReportType/TextBlockType的行，我希望返回具有ProductId 0的ReportType/TextBlockType组合的行

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一个人该怎么做呢？

这是一个多么可怕的问题！假设您正在寻找ProductID=20、ReportType=35和TextBlockType=102。如果ProductID=20不存在，并且您将接受默认值0，则此实体模型可能会有所帮助：

DECLARE @MyTable TABLE
(
  ProductID int,
  ReportType int,
  TextBlockType int,
  TextBlock nvarchar(MAX)
)

INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (10,15,100,'abc')
INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (0,15,100,'cba')
INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (0,25,102,'abc')
INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (0,25,102,'abc')
-- Comment | Uncomment to test receipt of record with ProductID = 20 or ProductID = 0
--INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (20,35,102,'def')
INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (0,35,102,'def')
INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (0,35,102,'ghi')
INSERT @MyTable (ProductID, ReportType, TextBlockType, TextBlock) VALUES (0,35,102,'jkl')

;WITH temp AS
(
   SELECT *,
         ROW_NUMBER() OVER (PARTITION BY ReportType, TextBlockType  ORDER BY ProductID     DESC) AS rownumber
   FROM @MyTable
)
SELECT *
FROM temp
WHERE rownumber = 1 and (ProductID = 20 or ProductID = 0)  And ReportType = 35 And TextBlockType = 102