如何从FLOWR xquery指定BaseX数据库？ [英] how to specify a BaseX database from a FLOWR xquery?
问题描述
如何通过针对指定数据库的FLOWR查询来
使用 Microsoft 数据，或来自 对于您似乎使用的basex命令行脚本，有 How can I get all the titles with a FLOWR query against a specified database? Specifying a document works: but that's against a stand-alone xml document and not from within the BaseX console itself. How can I use the name for the database directly in the FLOWR for BaseX to reference? or with the GUI: using Microsoft data, or from w3schools also. For the basex command line script you seem to use there is the 这篇关于如何从FLOWR xquery指定BaseX数据库？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！ -i 选项可用于将命名数据库设置为上下文或为此使用输入文件，因此 basex -i mydb xquery.xq 使用名为 mydb 的数据库作为查询的上下文，运行您的 xquery.xq 。thufir@dur:~/basex/microsoft$
thufir@dur:~/basex/microsoft$ basex titles.xq
[warning] /usr/bin/basex: Unable to locate /usr/share/java/jing.jar in /usr/share/java
<title>Creepy Crawlies</title>
<title>Lover Birds</title>
<title>MSXML3: A Comprehensive Guide</title>
<title>Maeve Ascendant</title>
<title>Microsoft .NET: The Programming Bible</title>
<title>Midnight Rain</title>
<title>Oberon's Legacy</title>
<title>Paradox Lost</title>
<title>Splish Splash</title>
<title>The Sundered Grail</title>
<title>Visual Studio 7: A Comprehensive Guide</title>
<title>XML Developer's Guide</title>thufir@dur:~/basex/microsoft$
thufir@dur:~/basex/microsoft$
thufir@dur:~/basex/microsoft$ cat titles.xq
for $x in doc("books.xml")/catalog/book
order by $x/title
return $x/title
thufir@dur:~/basex/microsoft$
>
> xquery //book[@id="bk112"]/title
<title>Visual Studio 7: A Comprehensive Guide</title>
Query executed in 1.47 ms.
>
> xquery /
<catalog>
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications
with XML.</description>
</book>
<book id="bk102">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-12-16</publish_date>
<description>A former architect battles corporate zombies,
an evil sorceress, and her own childhood to become queen
of the world.</description>
</book>
<book id="bk103">
<author>Corets, Eva</author>
<title>Maeve Ascendant</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-11-17</publish_date>
<description>After the collapse of a nanotechnology
society in England, the young survivors lay the
foundation for a new society.</description>
</book>
<book id="bk104">
<author>Corets, Eva</author>
<title>Oberon's Legacy</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-03-10</publish_date>
<description>In post-apocalypse England, the mysterious
agent known only as Oberon helps to create a new life
for the inhabitants of London. Sequel to Maeve
Ascendant.</description>
</book>
<book id="bk105">
<author>Corets, Eva</author>
<title>The Sundered Grail</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-09-10</publish_date>
<description>The two daughters of Maeve, half-sisters,
battle one another for control of England. Sequel to
Oberon's Legacy.</description>
</book>
<book id="bk106">
<author>Randall, Cynthia</author>
<title>Lover Birds</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-09-02</publish_date>
<description>When Carla meets Paul at an ornithology
conference, tempers fly as feathers get ruffled.</description>
</book>
<book id="bk107">
<author>Thurman, Paula</author>
<title>Splish Splash</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-11-02</publish_date>
<description>A deep sea diver finds true love twenty
thousand leagues beneath the sea.</description>
</book>
<book id="bk108">
<author>Knorr, Stefan</author>
<title>Creepy Crawlies</title>
<genre>Horror</genre>
<price>4.95</price>
<publish_date>2000-12-06</publish_date>
<description>An anthology of horror stories about roaches,
centipedes, scorpions and other insects.</description>
</book>
<book id="bk109">
<author>Kress, Peter</author>
<title>Paradox Lost</title>
<genre>Science Fiction</genre>
<price>6.95</price>
<publish_date>2000-11-02</publish_date>
<description>After an inadvertant trip through a Heisenberg
Uncertainty Device, James Salway discovers the problems
of being quantum.</description>
</book>
<book id="bk110">
<author>O'Brien, Tim</author>
<title>Microsoft .NET: The Programming Bible</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-09</publish_date>
<description>Microsoft's .NET initiative is explored in
detail in this deep programmer's reference.</description>
</book>
<book id="bk111">
<author>O'Brien, Tim</author>
<title>MSXML3: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-01</publish_date>
<description>The Microsoft MSXML3 parser is covered in
detail, with attention to XML DOM interfaces, XSLT processing,
SAX and more.</description>
</book>
<book id="bk112">
<author>Galos, Mike</author>
<title>Visual Studio 7: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>49.95</price>
<publish_date>2001-04-16</publish_date>
<description>Microsoft Visual Studio 7 is explored in depth,
looking at how Visual Basic, Visual C++, C#, and ASP+ are
integrated into a comprehensive development
environment.</description>
</book>
</catalog>
Query executed in 1.59 ms.
>
-i option you can use to set a named database as the context or to use an input file for that so basex -i mydb xquery.xq runs your xquery.xq with the database called mydb as the context of the query.
