大约有 6,100 项符合查询结果(耗时:0.0229秒) [XML]

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MySQL Results as comma separated list

... you can use just concat() Select concat(Col1, ',', Col2) as Foo_Bar from Table1; edit this only works in mySQL; Oracle concat only accepts two arguments. In oracle you can use something like select col1||','||col2||','||col3 as foobar from table1; in sql server you would use + instead of pipes....
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What is the difference between “text” and new String(“text”)?

...al is needed, use of this constructor is unnecessary since strings are immutable. Related questions Java Strings: “String s = new String(”silly“);” Strings are objects in Java, so why don’t we use ‘new’ to create them? What referential distinction means Examine the follow...
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Why does Hibernate require no argument constructor?

... the @JsonCreator annotation in Jackson does this, and much benefit of immutable objects was had. – drrob May 22 '17 at 11:03 ...
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Can I protect against SQL injection by escaping single-quote and surrounding user input with single-

...rmissions in the database to executing the needed SPs only, and not access tables directly. you can also easily verify that the entire codebase only accesses the DB through SPs... share | improve ...
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How to split a column into two columns?

...1 with just the fips and row columns? – Little Bobby Tables Apr 12 '16 at 11:48 2 @josh that's a ...
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Tips for debugging .htaccess rewrite rules

... name="go" value="OK"/><hr/><p> </p> <table><thead><tr><td><b>Test Vector</b></td><td>    <b>Result</b></td> <?php for ( $i=0; $i<$maxM; $i++ ) echo "<td>  ...
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make_unique and perfect forwarding

...le it might look pleasing to the eye, it doesn't bring anything new to the table. Correction: this isn't in fact true: Having a function call to wrap the new expression provides exception safety, for example in the case where you call a function void f(std::unique_ptr<A> &&, std::uniqu...
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MySql: Tinyint (2) vs tinyint(1) - what is the difference?

...width is most important if you are using ZEROFILL option, for example your table has following 2 columns: A tinyint(2) zerofill B tinyint(4) zerofill both columns has the value of 1, output for column A would be 01 and 0001 for B, as seen in screenshot below :) ...
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HashMap get/put complexity

...answer. Would you please provide links like this wikipedia entry for hash table in your answer? That way, the more interested reader could get to the nitty gritty of understanding why you gave your answer. – David Weiser Dec 29 '10 at 15:19 ...
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Best practice multi language website

...s upon change so you could replace the .INI files with a 3-column database table with placeholder, replacement, language. Compound key on placeholder and language. Then have another 2-col with tempfile (path to template) and modified (DATETIME). – Glitch Desire ...