在下面的 xml 中,有两种与零件和订单相关的信息。XML:
<mo>
<parts>
<part pno="10506">
<pname>Land Before Time I</pname>
<qoh>200</qoh>
<price>319.99</price>
<level>20</level>
</part>
<part pno="10000">
<pname>Bottle</pname>
<qoh>2</qoh>
<price>3.00</price>
<level>2</level>
</part>
<part pno="10508">
<pname>Land Before Time 3</pname>
<qoh>202</qoh>
<price>2.00</price>
<level>22</level>
</part>
<part pno="10509">
<pname>Cycle</pname>
<qoh>202</qoh>
<price>1.00</price>
<level>22</level>
</part>
</parts>
<orders>
<order ono="1000" >
<receivedDate>1967-08-17</receivedDate>
<shippedDate>1967-08-13</shippedDate>
<items>
<item>
<partNumber>10508</partNumber>
<quantity>2</quantity>
</item>
</items>
</order>
<order ono="1001" >
<receivedDate>1968-08-14</receivedDate>
<shippedDate>1968-08-11</shippedDate>
<items>
<item>
<partNumber>10000</partNumber>
<quantity>2</quantity>
</item>
</items>
</order>
<order ono="1022">
<receivedDate>1995-02-14</receivedDate>
<shippedDate>1995-02-13</shippedDate>
<items>
<item>
<partNumber>10000</partNumber>
<quantity>1</quantity>
</item>
<item>
<partNumber>10508</partNumber>
<quantity>2</quantity>
</item>
<item>
<partNumber>10509</partNumber>
<quantity>3</quantity>
</item>
</items>
</order>
</orders>
</mo>
需求:我想通过 XQuery 获取订单 1022 中产品的总价。我在 xquery 下面写了以获取 1022 号订单的零件价格总和。
查询:
for
$o in /mo/orders/order,
$p in /mo/parts/part
where
data($o/@ono) = ("1022")
and
data($p/@pno) = $o/items/item/partNumber
return fn:sum($p/price)
但是,此查询返回零件价格而不是总价格。结果是:3 2 1
有人知道如何获得价格总和吗?