我可以在 Microsoft SQL Server 中将 PIVOT 与内部联接结合起来吗？

Question

我有以下 SQL 查询：

SELECT CountryID, [10201] AS CountryGDPPerCapita, [10677] AS LifeExpTotal
FROM
(
    SELECT CountryID,FieldID,numeric 
    FROM globaledge.dbo.DIBS_Data
    WHERE CountryID IN (3,5)
    AND FieldID IN (10201,10677)
    AND year = 2002
)  SourceTable
PIVOT
(
    MAX(numeric)
    FOR FieldID IN ([10201],[10677])
) AS PivotTable
ORDER BY PivotTable.CountryID

这返回如下所示的内容：

CountryID CountryGDPPerCapita LifeExpTot​​al

3 35985.78 77.24

5 9147.7 74.54

然后我有另一个查询如下：

SELECT CountryName, CountryGDP, CountryGDPGrowth 
FROM globaledge.dbo.Country_Statistics 
WHERE CountryID IN (3,5) 
AND year=2002
Order By CountryName

生成以下内容：

CountryName CountryGDP CountryGDPGrowth

Mexico 1567000000000000 1.3

United States 14440000000000000 0.4

另请注意，我在两个表中都有 CountryID，它们指的是同一个国家/地区。我想要的是创建一个 SQL 查询，可能使用 INNER JOIN，返回以下内容：

CountryName CountryGDP CountryGDPGrowth CountryGDPPerCapita LifeExpTot

​​al Mexico 156700000000000000 1.3 35985.78 77.24

United States 144400000000000000 0.4 9147.7 74.54

帮我做这个查询吗？或者告诉我是否可能？

Answer 1

像这样的事情会起作用：

SELECT 
  a.CountryID, a.CountryName, a.CountryGDP, a.CountryGDPGrowth 
, b.CountryGDPPerCapita, b.LifeExpTotal
FROM
(
    SELECT CountryID, CountryName, CountryGDP, CountryGDPGrowth 
    FROM globaledge.dbo.Country_Statistics 
    WHERE CountryID IN (3,5) 
    AND year=2002
) AS a
JOIN 
(
    SELECT CountryID, [10201] AS CountryGDPPerCapita, [10677] AS LifeExpTotal
    FROM
    (
        SELECT CountryID,FieldID,numeric 
        FROM globaledge.dbo.DIBS_Data
        WHERE CountryID IN (3,5)
        AND FieldID IN (10201,10677)
        AND year = 2002
    )  SourceTable
    PIVOT
    (
        MAX(numeric)
        FOR FieldID IN ([10201],[10677])
    ) AS PivotTable
) AS b ON a.CountryID = b.CountryID
Order By a.CountryName