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Find difference between timestamps in seconds in PostgreSQL

I have a table in PostgreSQL 8.3 with 2 timestamp columns. I would like to get the difference between these timestamps in seconds. Could you please help me how to get this done? ...
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MySQL: Selecting multiple fields into multiple variables in a stored procedure

Can I SELECT multiple columns into multiple variables within the same select query in MySQL? 3 Answers ...
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Scala: what is the best way to append an element to an Array?

Say I have an Array[Int] like 3 Answers 3 ...
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POST JSON to API using Rails and HTTParty

I would like for a user within my ruby on rails app to be able to submit a ticket to my external ticket management system, squishlist.com. They have an api and instructions as follows. You need to authenticate and get a token and then submit the ticket with the token. From squishlist. ...
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Should I use the Reply-To header when sending emails as a service to others?

Suppose we have an application that acts as a middleman, allowing Company A to send reports to their customers. 3 Answers ...
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How do I get the MIN() of two fields in Postgres?

Let's say I have a table like this: 3 Answers 3 ...
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Real-world applications of zygohistomorphic prepromorphisms

Yes, these ones : 2 Answers 2 ...
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Is there a way to use two CSS3 box shadows on one element?

I'm trying to replicate a button style in a Photoshop mock-up that has two shadows on it. The first shadow is an inner lighter box shadow (2px), and the second is a drop shadow outside the button (5px) itself. ...
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regex for zip-code

I need Regex which can satisfy all my three condtions for zip-code. E.g- 3 Answers 3...
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Select second last element with css

I already know of :last-child. But is there a way to select the div: 2 Answers 2 ...