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Subtract one day from datetime

... Try this SELECT DATEDIFF(DAY, DATEADD(day, -1, '2013-03-13 00:00:00.000'), GETDATE()) OR SELECT DATEDIFF(DAY, DATEADD(day, -1, @CreatedDate), GETDATE()) ...
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How can I get column names from a table in Oracle?

... You can query the USER_TAB_COLUMNS table for table column metadata. SELECT table_name, column_name, data_type, data_length FROM USER_TAB_COLUMNS WHERE table_name = 'MYTABLE' share | improve ...
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SQL Group By with an Order By

... In all versions of MySQL, simply alias the aggregate in the SELECT list, and order by the alias: SELECT COUNT(id) AS theCount, `Tag` from `images-tags` GROUP BY `Tag` ORDER BY theCount DESC LIMIT 20 share ...
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creating a random number using MYSQL

I would like to know is there a way to select randomly generated number between 100 and 500 along with a select query. 6 A...
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phpunit mock method multiple calls with different arguments

... ->with($this->logicalOr( $this->equalTo('select * from roles'), $this->equalTo('select * from users') )) ->will($this->returnCallback(array($this, 'myCallback'))); var_dump($mock->Query("select * from us...
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How to create a HashMap with two keys (Key-Pair, Value)?

... a 100% sure whether private access level works correctly in any case when casting the Object to a Key. If you wonder about the finals, I declare anything as final which value is set on instancing and never changes - and therefore is an object constant. ...
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IntelliJ: Viewing diff of all changed files between local and a git commit/branch

... new UI, click on Show Diff with Working Tree Next a window will pop up. Select Files and press cmd + d Another window which shows diff. You can perform many different types of diff. Use cmd + shift + ] and cmd + shift + [ to shift between files. Diff Tip: IntelliJ provides advanced diff feat...
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How to get a number of random elements from an array?

...- Math.random()); // Get sub-array of first n elements after shuffled let selected = shuffled.slice(0, n); DEMO: share | improve this answer | follow | ...
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What is the fastest integer division supporting division by zero no matter what the result is?

... Awesome. Can be made constexpr and avoid needless type casts like this: template<typename T, typename U> constexpr auto fdiv( T t, U u ) -> decltype(t/(u+!u)) { return t/(u+!u); } And if you want 255, (lhs)/(rhs+!rhs) & -!rhs – Yakk - Adam Nevr...
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Read and write a String from text file

... You don't have to cast the errors as NSError, or even use "catch let error." You can just do catch and you get the error variable for free. – cuomo456 Nov 18 '16 at 0:36 ...