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How can I define a composite primary key in SQL?
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231
Just for clarification: a table can have at most one primary key. A primary key consists of one ...
get dictionary key by value
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671
Values not necessarily have to be unique so you have to do a lookup. You can do something like t...
Why is IntelliJ 13 IDEA so slow after upgrading from version 12?
While using IntelliJ 13 ultimate edition for a week, it just seems really slow.
20 Answers
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How do I load an org.w3c.dom.Document from XML in a string?
...gle turns up all sorts of garbage. What is the simplest solution? (In Java 1.5)
4 Answers
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MySQL Delete all rows from table and reset ID to zero
...y ID, which has an auto increment, to start again from 0 respectively from 1.
5 Answers
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PHP + MySQL transactions examples
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331
The idea I generally use when working with transactions looks like this (semi-pseudo-code):
try ...
jQuery empty() vs remove()
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empty() will empty the selection of its contents, but preserve the selection itself.
remove()...
Drop a temporary table if it exists
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From SQL Server 2016 you can just use
DROP TABLE IF EXISTS ##CLIENTS_KEYWORD
On previous versions you can use
IF OBJECT_ID('tempdb..##CLIENTS_KEYWORD', 'U') IS NOT NULL
/*Then it exists*/
DROP TABLE ##CLIENTS_KEYWORD
CREATE TABLE ##CLIENT...
How can I change a secret Gist to public?
...the gist to public, but I can't find how to set it publi
Since May, 9th 2014, it is possible: "Change the visibility of your Gists"
You can change the visibility of your Gists whenever you want.
When editing a Gist you'll now notice a new option to toggle the visibility between Public and Secret.
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