在SQL SERVER中显示条件Where条件
我正在努力实现这样的目标在SQL SERVER中显示条件Where条件,sql,sql-server,sql-server-2008,Sql,Sql Server,Sql Server 2008,我正在努力实现这样的目标 SELECT Name, Age From Employee WHERE ID=1 AND CASE(WHEN backguid='00000000-0000-0000-0000-000000000000' THEN (State=@state and City = @city) ELSE (buildingID=backguid) END 我只想在backguid为空时(即00000000-0000-0000-0000-000000000000)在wher
SELECT Name, Age From Employee
WHERE ID=1
AND CASE(WHEN backguid='00000000-0000-0000-0000-000000000000'
THEN (State=@state and City = @city)
ELSE (buildingID=backguid)
END
我只想在backguid为空时(即00000000-0000-0000-0000-000000000000)在where子句中显示state和city列。否则我只想显示一列,即buildingID=backguid
我在这里使用的总体代码是:
DECLARE
@firstName varchar(50),
@buildingID XML='<items><item ID="76BA34CE-273A-46AC-B4EF-C99A3E93DD21" /></items>',
@fetchedBuildValue uniqueidentifier,
@State VARCHAR(50) ='WA',
@city VARCHAR(50) ='Spokane'
set @fetchedBuildValue = (SELECT data.item.value('./@ID', 'uniqueidentifier') AS PId
FROM @buildingID.nodes('/items/item') data(item));
SELECT
PortalUser.[ID]
,PortalUser.[Status]
,PortalUser.[Type]
,PortalUser.[Prefix]
,PortalUser.[Suffix]
,PortalUser.[FirstName]
,PortalUser.[MiddleName]
,PortalUser.[LastName]
,PortalUser.[Title]
,PortalUser.[Department]
,PortalUser.[URL]
,PortalUser.[TenantID]
,PortalUser.[DefaultPropertyID]
,PortalUser.[DoNotEmail]
,PortalUser.[Profile]
,PortalUser.[PrimaryPhoneNumberType]
,PortalUser.[PrimaryPhoneNumber]
,PortalUser.[BusinessPhoneNumber]
,PortalUser.[HomePhoneNumber]
,PortalUser.[MobilePhoneNumber]
,PortalUser.[FaxPhoneNumber]
,Building.BuildingName
FROM
PortalUser
INNER JOIN Relationship AS T_U ON T_U.Target = PortalUser.ID AND T_U.TargetType = 0 AND T_U.SourceType = 6
INNER JOIN Tenant ON T_U.Source = Tenant.ID
WHERE
(@firstname IS NULL OR PortalUser.FirstName LIKE '%' + @firstname + '%')
AND CASE(WHEN @fetchedBuildValue ='00000000-0000-0000-0000-000000000000'
THEN (State=@state AND City = @city)
ELSE (buildingID=backguid)
END
然而,我无法通过案例来实现它。我不知道我错过了什么。这可能会有所帮助
SELECT Name, Age From Employee
WHERE ID=1 AND (
(backguid='00000000-0000-0000-0000-000000000000' and State=@state and City = @city)
OR ( backguid !='00000000-0000-0000-0000-000000000000' and buildingID=backguid)
)
case表达式返回单个原子标量值。所以你不能用这种方式回答你的问题吗?