sql - Quality Center でこれを行うより良い方法はありますか?

Question

QC で特定のフォルダーの下にあるすべてのものを抽出しようとしています。

SELECT A.AL_FATHER_ID, A.AL_ITEM_ID, A.AL_DESCRIPTION as Folder
FROM All_LISTS A
where A.AL_DESCRIPTION=@folderName@

union
SELECT B.AL_FATHER_ID, B.AL_ITEM_ID, B.AL_DESCRIPTION as Folder
FROM All_LISTS B
where B.AL_FATHER_ID = (select A.AL_ITEM_ID from ALL_LISTS A where A.AL_DESCRIPTION=@folderName@)

union
SELECT B.AL_FATHER_ID, B.AL_ITEM_ID, B.AL_DESCRIPTION as Folder
FROM All_LISTS B
where B.AL_FATHER_ID in (select C.AL_ITEM_ID from ALL_LISTS C where C.AL_FATHER_ID= (select A.AL_ITEM_ID from ALL_LISTS A where A.AL_DESCRIPTION=@folderName@))

union
SELECT B.AL_FATHER_ID, B.AL_ITEM_ID, B.AL_DESCRIPTION as Folder
FROM All_LISTS B
where B.AL_FATHER_ID in (select D.AL_ITEM_ID from ALL_LISTS D where D.AL_FATHER_ID in (select C.AL_ITEM_ID from ALL_LISTS C where C.AL_FATHER_ID= (select A.AL_ITEM_ID from ALL_LISTS A where A.AL_DESCRIPTION=@folderName@)))

union
SELECT B.AL_FATHER_ID, B.AL_ITEM_ID, B.AL_DESCRIPTION as Folder
FROM All_LISTS B
where B.AL_FATHER_ID in (select E.AL_ITEM_ID from ALL_LISTS E where E.AL_FATHER_ID in(select D.AL_ITEM_ID from ALL_LISTS D where D.AL_FATHER_ID in (select C.AL_ITEM_ID from ALL_LISTS C where C.AL_FATHER_ID= (select A.AL_ITEM_ID from ALL_LISTS A where A.AL_DESCRIPTION=@folderName@))))

union
SELECT B.AL_FATHER_ID, B.AL_ITEM_ID, B.AL_DESCRIPTION as Folder
FROM All_LISTS B
where B.AL_FATHER_ID in (select F.AL_ITEM_ID from ALL_LISTS F where F.AL_FATHER_ID in (select E.AL_ITEM_ID from ALL_LISTS E where E.AL_FATHER_ID in(select D.AL_ITEM_ID from ALL_LISTS D where D.AL_FATHER_ID in (select C.AL_ITEM_ID from ALL_LISTS C where C.AL_FATHER_ID= (select A.AL_ITEM_ID from ALL_LISTS A where A.AL_DESCRIPTION=@folderName@)))))

ご協力いただきありがとうございます