大约有 7,000 项符合查询结果(耗时:0.0250秒) [XML]

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Difference between natural join and inner join

... definition of a natural join is to join on *all like-named columns*. From MySQL doc: The NATURAL [LEFT] JOIN of two tables is defined to be semantically equivalent to an INNER JOIN or a LEFT JOIN with a USING clause that names all columns that exist in both tables.. And another thing - in practice ...
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How to convert an xml string to a dictionary?

... >>> tree = ElementTree.parse('your_file.xml') >>> root = tree.getroot() >>> xmldict = XmlDictConfig(root) Or, if you want to use an XML string: >>> root = ElementTree.XML(xml_string) >>> xmldict = XmlDictConfig(root) And then...
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Ukkonen's suffix tree algorithm in plain English

...ts. What we are building, is basically like a search trie. So there is a root node, edges going out of it leading to new nodes, and further edges going out of those, and so forth But: Unlike in a search trie, the edge labels are not single characters. Instead, each edge is labeled using a pair of ...
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Add a prefix to all Flask routes

... container (anything that speaks WSGI will do) and to set your APPLICATION_ROOT config value to your prefix: app.config["APPLICATION_ROOT"] = "/abc/123" @app.route("/") def index(): return "The URL for this page is {}".format(url_for("index")) # Will return "The URL for this page is /abc/123/...
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Using SSH keys inside docker container

...sh-server \ libmysqlclient-dev # Authorize SSH Host RUN mkdir -p /root/.ssh && \ chmod 0700 /root/.ssh && \ ssh-keyscan github.com > /root/.ssh/known_hosts # Add the keys and set permissions RUN echo "$ssh_prv_key" > /root/.ssh/id_rsa && \ echo "$s...
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How to change context root of a dynamic web project in Eclipse?

...In your project's Properties, choose Web Project Settings. Change Context root to app. Choose Window > Show View > Servers. Stop the server by either clicking the red square box ("Stop the server" tooltip) or context-click on the server listing to choose "Stop". On the server you want to ...
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How to pretty print XML from the command line?

... libxml2-utils This utility comes with libxml2-utils: echo '<root><foo a="b">lorem</foo><bar value="ipsum" /></root>' | xmllint --format - Perl's XML::Twig This command comes with XML::Twig perl module, sometimes xml-twig-tools package: echo '<root...
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SQL Server: SELECT only the rows with MAX(DATE)

... For MySql you can do something like the following: select OrderNO, PartCode, Quantity from table a join (select ID, MAX(DateEntered) from table group by OrderNO) b on a.ID = b.ID ...
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When to use SELECT … FOR UPDATE?

...ends on the concurrency control your database system is using. MyISAM in MySQL (and several other old systems) does lock the whole table for the duration of a query. In SQL Server, SELECT queries place shared locks on the records / pages / tables they have examined, while DML queries place update ...
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How to implement a tree data-structure in Java? [closed]

... Here: public class Tree<T> { private Node<T> root; public Tree(T rootData) { root = new Node<T>(); root.data = rootData; root.children = new ArrayList<Node<T>>(); } public static class Node<T> { priva...