大约有 47,000 项符合查询结果(耗时:0.0546秒) [XML]

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Select Last Row in the Table

I would like to retrieve the last file inserted into my table. I know that the method first() exists and provides you with the first file in the table but I don't know how to get the last insert. ...
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Formatting code in Notepad++

...X -> HTML Tidy -> Tidy: Reindent XML Remember to have the HTML code selected before you do this. share | improve this answer | follow | ...
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How can I use external JARs in an Android project?

...your JAR files to the libs folder Now right click on the Jar file and then select Build Path > Add to Build Path, which will create a folder called 'Referenced Libraries' within your project By doing this, you will not lose your libraries that are being referenced on your hard drive whenever you...
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Xcode 6 Storyboard the wrong size?

...way at some point." You probably haven't added the layout constraints. Select your label, tap the layout constraints button on the bottom: On that menu add width and height (it should NOT be the same as mine) by checking their checkbox and click add constraints. Then Control-drag your label t...
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Does order of where clauses matter in SQL?

...rstName) (or both) On the other hand - again for SQL Server - if you use SELECT * to grab all columns from a table, and the table is rather small, then there's a good chance the query optimizer will just do a table (or clustered index) scan instead of using an index (because the lookup into the fu...
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What is a Proxy in Doctrine 2?

...protected $lastname; // bunch of setters/getters here } DQL query: SELECT u.id, u.username FROM Entity\User u WHERE u.id = :id As you can see this query doesn't return firstname and lastname properties, therefore you cannot create User object. Creation of incomplete entity could lead to un...
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ALTER TABLE to add a composite primary key

...dexed from left to right. For example, consider the following queries: A) SELECT person, place, thing FROM provider WHERE person = 'foo' AND thing = 'bar'; B) SELECT person, place, thing FROM provider WHERE person = 'foo' AND place = 'baz'; C) SELECT person, place, thing FROM provider WHERE person ...
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Show data on mouseover of circle

...and you don't need the mousehandler. The code would be something like vis.selectAll("circle") .data(datafiltered).enter().append("svg:circle") ... .append("svg:title") .text(function(d) { return d.x; }); If you want fancier tooltips, you could use tipsy for example. See here for an ex...
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Find an element in DOM based on an attribute value

...ears the landscape has changed drastically. You can now reliably use querySelector and querySelectorAll, see Wojtek's answer for how to do this. There's no need for a jQuery dependency now. If you're using jQuery, great...if you're not, you need not rely it on just for selecting elements by att...
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python-pandas and databases like mysql

...a_conn = cx_Oracle.connect('your_connection_string') df_ora = pd.read_sql('select * from user_objects', con=ora_conn) print 'loaded dataframe from Oracle. # Records: ', len(df_ora) ora_conn.close() And here is the equivalent example for MySQLdb: import MySQLdb mysql_cn= MySQLdb.connect(host='...