Question

我认为Xquery没有“AND”运算符，我不能这样做：

如果 node1 = xxx 且 node2 = yyy 且 node3 = zzz 则将node3替换为www

Answer 1

XQuery和And运算符是“和”。它还有OR运算符“或”。

let $d := <Employee>
<Name>Test</Name>
<ID>1909239</ID>
<Address>test Add </Address>
<Email>test@test.net</Email>
<Department>Dept 1</Department>
<Department>Dept 2</Department>
<Department>Dept 3</Department>
<Department>Dept 4</Department>
<Department>Dept 5</Department>

return if( ($d//*:Department[1]/text() = 'Dept 1') and ($d//*:Department[1]/text() = 'Dept 2') ) then fn:true() else fn:false()

Answer 2

http://x-query.com/pipermail/talk/2004-November/000358.html

＆LT;＆LT; XQuery中没有"&="这样的运算符。我想你需要的而不是contains（）函数，尽管你可能想要匹配（）。

所以我认为你的查询应该是这样的：

let $query :=
  if ($ttl != "") then (
    for $entries in collection($collctn)//TEI.2
                      [contains(., $kwds) and
                       descendant::head[contains(., $ttl)]
    return (
      if ($entries/@id = "ppp.00271") then (
        ...
      )
      else if ($entries/@id = "ppp.00237") then (
        ...
      )
      else if ($entries/@id = "ppp.00473") then (
        ...
      )
      else (
        ...
      )
  )
  else if (...) then (
    ...
  )
  else (
    ...
  )

请带有“AND”运算符的Xquery示例

2 个答案: