T-SQL查询：在'Union ALL'语句中包含逻辑

Question

Mark Ba​​nnister在这个论坛上非常友好，可以帮助我创建原始查询。我试图修改它以包含case语句中列出的项目的条件逻辑。查询的目标可能包含特定软件项目的一个或另一个版本。该查询将返回任一项作为兼容。是否有可能在联盟的所有部分中包含逻辑，还是有另一种方法来实现这一点？

SELECT MIN(CASE 
WHEN DN.Name = 'Adobe Reader XI (11.0.01)' THEN CASE ARP.Version0 WHEN '11.0.01' THEN 'Adobe Reader Compliant' ELSE 'Adobe Reader not Compliant' END 
WHEN DN.Name = 'ActivClient x86' THEN CASE ARP.Version0 WHEN '6.2' THEN 'Active Client Compliant' ELSE 'Active Client not Compliant' END 
WHEN DN.Name = 'Adobe Flash Player 11 ActiveX' THEN CASE ARP.Version0 WHEN '11.7.700.202' THEN 'Adobe Flash Player Compliant' ELSE 'Adobe Flash Player not Compliant' END 
WHEN DN.Name = 'Adobe Shockwave Player 12.0' THEN CASE ARP.Version0 WHEN '12.0.2.122' THEN 'Adobe Shockwave Compliant' ELSE 'Adobe Shockwave not Compliant' END END) as Complaint 
From (Select 'Adobe Reader XI (11.0.01)' NAME UNION ALL SELECT 'ActivClient x86' UNION ALL SELECT 'Adobe Flash Player 11 ActiveX' UNION ALL SELECT 'Adobe Shockwave Player 12.0') as DN 
CROSS JOIN dbo.v_R_System AS SYS 
LEFT JOIN dbo.v_Add_Remove_Programs AS ARP 
ON ARP.ResourceID = SYS.ResourceID AND ARP.DisplayName0 = DN.Name 
WHERE (SYS.Netbios_Name0 = @System_Name) 
GROUP BY SYS.Netbios_Name0, DN.Name 

例如改变：通过使用不同的形式

WHEN DN.Name = 'ActivClient x86' or DN.Name = 'ActivClient x64' THEN CASE ARP.Version0 WHEN '6.2' THEN 'Active Client Compliant' ELSE 'Active Client not Compliant' END 

Answer 1

你也可以把逻辑在现有的CASE语句。例如，您可以替换：

CASE ARP.Version0 WHEN '11.0.01' THEN 'Adobe Reader Compliant' 
           ELSE 'Adobe Reader not Compliant' END 

与

CASE WHEN ARP.Version0 IN ('11.0.01', '11.0.02') THEN 'Adobe Reader Compliant' 
                ELSE 'Adobe Reader not Compliant' END