SQL CASE語句

Question

我有以下查詢，我想把它們放在一個sql CASE語句中，所以我只有一個查詢，但我不知道該怎麼做。有人能幫助我嗎？

IF (SELECT EtlLoadId 
FROM ssislogs.audit.processcontrol 
WHERE SubjectArea = 'UaqaFacetsImp') > 0 
SELECT pc.SrcFileName + ' - '+ CONVERT(VARCHAR(10), pc.[RecordCount]) AS FacetsImpCount 
FROM ssislogs.audit.processcontrol pc left outer join 
Uaqa.LettersAndCardsExports lc 
on pc.etlloadid = lc.etlloadid 
    WHERE pc.subjectarea = 'UaqaFacetsImp' 
ELSE 
SELECT 'No input file' AS FacetsImpCount 

---

SELECT pc.subjectarea AS FacetsRjctFile 
FROM ssislogs.audit.processcontrol pc left outer join 
Uaqa.LettersAndCardsExports lc 
on pc.etlloadid = lc.etlloadid 
    WHERE pc.subjectarea = 'UaqaFacetsRjct' 

---

SELECT pc.subjectarea AS FacetsPvsFile 
FROM ssislogs.audit.processcontrol pc left outer join 
Uaqa.LettersAndCardsExports lc 
on pc.etlloadid = lc.etlloadid 
    WHERE pc.subjectarea = 'UaqaFacetsPvs' 

感謝

Answer 1

Propably一個UNION查詢幫助：

SELECT 'FacetsRjctFile' as Type, pc.subjectarea 
FROM ssislogs.audit.processcontrol pc left outer join 
Uaqa.LettersAndCardsExports lc 
on pc.etlloadid = lc.etlloadid 
    WHERE pc.subjectarea = 'UaqaFacetsRjct' 

UNION 

SELECT 'FacetsPvsFile' as Type, pc.subjectarea 
FROM ssislogs.audit.processcontrol pc left outer join 
Uaqa.LettersAndCardsExports lc 
on pc.etlloadid = lc.etlloadid 
    WHERE pc.subjectarea = 'UaqaFacetsPvs'