Question

我有一个存储不同类型的程序＆＃34;资产＆＃34;对于可以标记为＆＃34;已删除＆＃34;的建筑物。我可以创建一个查询来计算按类型划分的资产数量，另一个可以计算标识为仍然存在的项目数。但我想要做的是将两者合并为一张表。

查询1

SELECT
    theAssetOutletType, COUNT(id) AS TotalNoOfAssets
FROM
    dbo.tblLEGAssets
WHERE
    buildingID = 1
GROUP BY 
    theAssetOutletType

查询2

SELECT
    theAssetOutletType, COUNT(id) AS ItemsStillPresent
FROM            
    dbo.tblLEGAssets
WHERE
    buildingID = 1 AND removed <> 0
GROUP BY 
    theAssetOutletType

提前感谢您的任何帮助

Answer 1

我建议使用条件聚合：

SELECT theAssetOutletType, 
       COUNT(*) as TotalNoOfAssets
       SUM(CASE WHEN removed <> 0 THEN 1 ELSE 0 END) as ItemsStillPresent
FROM dbo.tblLEGAssets 
WHERE buildingID = 1 
GROUP BY theAssetOutletType;

这会将值放在同一行的不同列中 - 这对我来说比在单独的行上更有意义。

Answer 2

尝试联盟：

SELECT theAssetOutletType, count(id) as TotalNoOfAssets FROM dbo.tblLEGAssets where buildingID=1 group by theAssetOutletType

UNION

SELECT theAssetOutletType, count(id) as ItemsStillPresent FROM dbo.tblLEGAssets where buildingID=1 and removed<> 0 group by theAssetOutletType

Answer 3

通过使用嵌套选择，我找到了一个可以使用的工作，但如果仍然可以，我很想知道答案：

SELECT theassetoutlettype,
       noofitems,
       noremoved,
       noofitems - noremoved AS noLeft
FROM   (SELECT theassetoutlettype,
               Count(id)    AS NoOfItems,
               Sum(removed) AS noRemoved
        FROM   dbo.tbllegassets
        WHERE  buildingid = 1
        GROUP  BY theassetoutlettype) nested

Answer 4

我终于找到了一个解决方案......经过了大量的试验和错误但它现在有效了。这是我的存储过程解决方案，附加表“tblLEGAssetOutletTypes”，其中包含一个包含6种资产类型列表的字段。以下代码将始终返回6行，其中包含项目类型，资产总数，已删除资产的数量以及剩余的总数。希望其他需要类似问题的人解决使用代码：

SELECT tblLEGAssetOutletTypes.assetOutletType, nested.NoOfItems, nested.noRemoved, NoOfItems-noRemoved AS noLeft
FROM (SELECT        theAssetOutletType, COUNT(id) AS NoOfItems, SUM(removed) AS noRemoved
      FROM            tblLEGAssets
      where buildingID=@buildingID
     GROUP BY theAssetOutletType)  AS nested
RIGHT JOIN tblLEGAssetOutletTypes ON nested.theAssetOutletType = tblLEGAssetOutletTypes.assetOutletType;

SQL Server：组合查询结果

4 个答案: