我正在处理一个大型查询：
DECLARE @userParam VARCHAR(100)
,@startDateParam DATETIME
,@endDateParam DATETIME
,@orgTeamPK VARCHAR(100)
,@search VARCHAR(100)
,@productId VARCHAR(100)
,@themeParam VARCHAR(100)
SET @userParam = 'David Tunnell (tunnelld)'
SET @startDateParam = '2014-01-27'
SET @endDateParam = '2014-02-02'
SET @orgTeamPK = '%'
SET @search = '%'
SET @productId = '%'
SET @themeParam = '%'
SELECT '3' AS RowType
,DTH.EnteredBy AS Person
,COALESCE(PDT.[Name], APP.AppName) AS Project
,(
CASE
WHEN (
STY.KanBanProductId IS NOT NULL
AND STY.SprintId IS NULL
)
THEN 'KanBan'
WHEN (
STY.KanBanProductId IS NULL
AND STY.SprintId IS NOT NULL
)
THEN 'Sprint'
ELSE SCY.Catagory
END
) AS ProjectType
,COALESCE(STY.[Number], NSS.IncidentNumber) AS StoryNumber
,COALESCE(STY.Title, NSS.[Description]) AS StoryTitle
,CONVERT(VARCHAR(20), STY.Effort) AS Effort
,COALESCE(TSK.[Name], '') AS Task
,CONVERT(VARCHAR(20), TSK.OriginalEstimateHours) AS OriginalEstimateHours
,SCY.Catagory AS Category
,NSS.IncidentNumber AS IncidentNumber
,APP.AppName AS ApplicationName
,CAST(SUM(CASE
WHEN DATEPART(dw, DTH.ActivityDate) = 2
THEN DTH.[Hours]
ELSE 0
END) AS VARCHAR(20)) AS MondayHours
,CAST(SUM(CASE
WHEN DATEPART(dw, DTH.ActivityDate) = 3
THEN DTH.[Hours]
ELSE 0
END) AS VARCHAR(20)) AS TuesdayHours
,CAST(SUM(CASE
WHEN DATEPART(dw, DTH.ActivityDate) = 4
THEN DTH.[Hours]
ELSE 0
END) AS VARCHAR(20)) AS WednesdayHours
,CAST(SUM(CASE
WHEN DATEPART(dw, DTH.ActivityDate) = 5
THEN DTH.[Hours]
ELSE 0
END) AS VARCHAR(20)) AS ThursdayHours
,CAST(SUM(CASE
WHEN DATEPART(dw, DTH.ActivityDate) = 6
THEN DTH.[Hours]
ELSE 0
END) AS VARCHAR(20)) AS FridayHours
,CAST(SUM(CASE
WHEN DATEPART(dw, DTH.ActivityDate) = 7
THEN DTH.[Hours]
ELSE 0
END) AS VARCHAR(20)) AS SaturdayHours
,CAST(SUM(CASE
WHEN DATEPART(dw, DTH.ActivityDate) = 1
THEN DTH.[Hours]
ELSE 0
END) AS VARCHAR(20)) AS SundayHours
,CAST(SUM(DTH.[Hours]) AS VARCHAR(20)) AS TotalHours
,CAST(SUM(CASE
WHEN DTH.Hours > 0
THEN DTH.[UserDifference]
END) AS VARCHAR(20)) AS DifferentUsers
,CAST(SUM(CASE
WHEN DTH.Hours > 0
THEN DTH.DoubleBookedFlag
END) AS VARCHAR(20)) AS DoubleBookedFlag
,DTH.PointPerson AS PointPerson
FROM DailyTaskHours DTH
LEFT JOIN Task TSK ON DTH.TaskId = TSK.PK_Task
LEFT JOIN Story STY ON TSK.StoryId = STY.PK_Story
LEFT JOIN NonScrumStory NSS ON DTH.NonScrumStoryId = NSS.PK_NonScrumStory
LEFT JOIN SupportCatagory SCY ON NSS.CatagoryId = SCY.PK_SupportCatagory
LEFT JOIN [Application] APP ON NSS.ApplicationId = APP.PK_Application
LEFT JOIN Sprint SPT ON STY.SprintId = SPT.PK_Sprint
LEFT JOIN Product PDT ON STY.ProductId = PDT.PK_Product
LEFT JOIN [User] USR ON DTH.EnteredBy = USR.DisplayName
LEFT JOIN [StoryProductTheme] SPM ON STY.PK_Story = SPM.StoryId
LEFT JOIN [ProductTheme] PTM ON SPM.ProductThemeId = PTM.PK_ProductTheme
WHERE DTH.EnteredBy LIKE @userParam
AND ActivityDate >= @startDateParam
AND ActivityDate <= @endDateParam
AND 1 = CASE ISNUMERIC(@productId)
WHEN 0
THEN CASE
WHEN DTH.TaskId IS NULL
OR PDT.PK_Product LIKE @productId
THEN 1
END
WHEN 1
THEN CASE
WHEN DTH.TaskId IS NOT NULL
AND PDT.PK_Product = @productId
THEN 1
END
END
AND (
(
@orgTeamPK = '%'
AND (
USR.[OrganizationalTeamId] LIKE @orgTeamPK
OR USR.[OrganizationalTeamId] IS NULL
)
)
OR (
@orgTeamPK <> '%'
AND (USR.[OrganizationalTeamId] LIKE @orgTeamPK)
)
AND (
(
STY.Number LIKE @search
OR STY.Number IS NULL
)
OR (
STY.Title LIKE @search
OR STY.Title IS NULL
)
OR (
TSK.NAME LIKE @search
OR TSK.NAME IS NULL
)
)
)
GROUP BY DTH.EnteredBy
,PDT.[Name]
,SPT.[Name]
,SPT.[Description]
,STY.[Number]
,STY.Title
,TSK.[Name]
,SCY.Catagory
,NSS.IncidentNumber
,APP.AppName
,STY.KanBanProductId
,STY.SprintId
,NSS.[Description]
,TSK.OriginalEstimateHours
,STY.Effort
,DTH.PointPerson
HAVING SUM(DTH.[Hours]) > 0
我想尝试做的是添加以特定方式过滤的功能。这是我添加到WHERE子句的代码：
AND (
ISNUMERIC(@themeParam) = 0
AND PTM.ThemeId LIKE @themeParam
)
OR (
ISNUMERIC(@themeParam) = 1
AND @themeParam = 6
AND STY.KanBanProductId IS NULL
AND STY.SprintId IS NOT NULL
)
OR (
ISNUMERIC(@themeParam) = 1
AND @themeParam <> 6
AND PTM.ThemeId = @themeParam
)
这是我的代码目标：
如果@themeParam = '%'，我想要运行第一部分，因为ISNUMERIC(@themeParam)应评估为零。
如果@themeParam = 6，我希望第二部分运行并返回所有值STY.KanBanProductId IS NULL AND STY.SprintId IS NOT NULL。
如果@themeParam <> 6，我希望第一个投放，只返回PTM.ThemeId = @themeParam。
我有两个问题。所有的拳头我得到错误：
将varchar值'％'转换为数据类型时转换失败 中间体
我认为如果ISNUMERIC(@themeParam)未评估为1，则其余代码将无法运行，并且不会尝试将'％'与6进行比较。
我的第二个问题是，当我为@themeParam输入一个数字时，查询会运行，但似乎忽略了where子句的所有其他部分，我不明白为什么。
我做错了什么，我该如何解决？提前谢谢。
答案 0 :(得分：1)
不要将外连接表的条件添加到WHERE子句，而是添加到ON子句或考虑NULLS。原因如下：一旦外连接表（如PTM）中没有匹配的记录，就会创建一个伪记录，并将所有值设置为NULL。当要求PTM.meId LIKE @themeParam或......你可能会错误地再次消除这些记录。