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PostgreSQL - fetch the row which has the Max value for a column

...that contains records with columns for time_stamp, usr_id, transaction_id, and lives_remaining. I need a query that will give me the most recent lives_remaining total for each usr_id ...
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Can an html element have multiple ids?

I understand that an id must be unique within an HTML/XHTML page. 18 Answers 18 ...
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What's the difference between an id and a class?

What's the difference between <div class=""> and <div id=""> when it comes to CSS? Is it alright to use <div id=""> ? ...
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PostgreSQL function for last inserted ID

...an id column created with the SERIAL pseudo-type. To avoid relying on this and to feel more clean, you can use instead pg_get_serial_sequence: INSERT INTO persons (lastname,firstname) VALUES ('Smith', 'John'); SELECT currval(pg_get_serial_sequence('persons','id')); Caveat: currval() only work...
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How to jQuery clone() and change id?

I need to clone the id and then add a number after it like so id1 , id2 , etc. Everytime you hit clone you put the clone after the latest number of the id. ...
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Possible to do a MySQL foreign key to one of two possible tables?

...table. Polymorphic Associations are supported by frameworks such as Rails and Hibernate. But they explicitly say that you must disable SQL constraints to use this feature. Instead, the application or framework must do equivalent work to ensure that the reference is satisfied. That is, the value ...
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Difference between using bean id and name in Spring configuration file

Is there any difference between using an id attribute and name attribute on a <bean> element in a Spring configuration file? ...
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How to drop SQL default constraint without knowing its name?

...ver, I know the query to check if a default constraint exists for a column and drop a default constraint is: 14 Answers ...
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When and why I should use session_regenerate_id()?

Why and when should I use the session_regenerate_id() function in php? Should I always use it after I use the session_start() ? I've read that I have to use it to prevent session fixation, is this the only reason? ...
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How to find out client ID of component for ajax update/render? Cannot find component with expression

... following code is inspired from PrimeFaces DataGrid + DataTable Tutorials and put into a <p:tab> of a <p:tabView> residing in a <p:layoutUnit> of a <p:layout> . Here is the inner part of the code (starting from p:tab component); the outer part is trivial. ...