想擁有一個「爲」語句「其中」子句中XQuery中

我試圖運行下面的XQuery：想擁有一個「爲」語句「其中」子句中XQuery中

for $a1 in doc("TSS_Data.xml")/root/auditions/audition, $a2 in doc("TSS_Data.xml")/root/auditions/audition 
where ($a1/@ID != $a2/@ID and $a1/@contestantId != $a2/@contestantId and $a1/@artworkId = $a2/@artworkId and 
$a1/@showId = $a2/@showId) 
    for $s1 in doc("TSS_Data.xml")/root/scores/score[@auditionId = $a1/@ID], 
    $s2 in doc("TSS_Data.xml")/root/scores/score[@auditionId = $a2/@ID] 
     return data (doc("TSS_Data.xml")/root/contestants/contestant[@ID = $a1/@contestantId]/@name)

但我得到一個錯誤，意外標記「爲」 4行。這是錯誤的語法嗎？我如何在「where」子句中編寫「for」循環？

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2014-11-17 user1173339

A for總是需要return語句，就像在內部循環中一樣。因此，它應該是

for $a1 in doc("TSS_Data.xml")/root/auditions/audition, $a2 in doc("TSS_Data.xml")/root/auditions/audition 
where ($a1/@ID != $a2/@ID and $a1/@contestantId != $a2/@contestantId and $a1/@artworkId = $a2/@artworkId and $a1/@showId = $a2/@showId) 
return 
    for $s1 in doc("TSS_Data.xml")/root/scores/score[@auditionId = $a1/@ID], 
    $s2 in doc("TSS_Data.xml")/root/scores/score[@auditionId = $a2/@ID] 
     return data (doc("TSS_Data.xml")/root/contestants/contestant[@ID = $a1/@contestantId]/@name)

來源

2014-11-17 08:39:28 dirkk

想擁有一個「爲」語句「其中」子句中XQuery中

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