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Computed / calculated / virtual / derived columns in PostgreSQL
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Well, not sure if this is what You mean but Posgres normally support "dummy" ETL syntax.
I created one empty column in table and then needed to fill it by calculated records depending on values in row.
UPDATE table01
SET column03 = column01*column02; /*e.g. f...
Select count(*) from multiple tables
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why do you need dual? what does that mean?
– Ray Lu
Mar 3 '09 at 12:44
31
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git branch -d gives warning
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Yeah, master is not involved in this. You mean the current branch, rather. ;)
– Fernando Espinosa
Aug 31 '16 at 18:43
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Counting DISTINCT over multiple columns
...ould you please add an example or code sample to show more about what this means and how to do it?
– jayqui
Feb 20 at 22:31
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setResult does not work when BACK button pressed
...o check the resultCode for value Activity.RESULT_CENCELED. If yes, then it means that either BACK was pressed or the activity crashed. Hope it works for you guys, works for me :).
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improve th...
What's the difference between django OneToOneField and ForeignKey?
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thank you, Dose OneToOneField(someModel) mean ForeignKey(SomeModel, unique=True)?
– redice
May 3 '11 at 14:13
10
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What algorithm does Readability use for extracting text from URLs?
...ents (menus etc.)
If an author wants you to deeply understand what he/she means, he/she uses many words. This way, ambiguity is removed at the cost of an increase in redundancy. Article-like content usually falls into this class as it has more than only a few words.
While this separation seems to ...
What is difference between width, innerWidth and outerWidth, height, innerHeight and outerHeight in
...eems necessary to tell about the values assignations and compare about the meaning of "width" parameter in jq :
(assume that new_value is defined in px unit)
jqElement.css('width',new_value);
jqElement.css({'width: <new_value>;'});
getElementById('element').style.width= new_value;
The three...
What is the difference between fastcgi and fpm?
I am trying to install php with fpm on macports. I read somewhere that fpm means FastCGI process manager. Does that mean fastcgi and fpm are same? If they are same, then why do we have two different macports variants for php namely
"php5 +fastcgi" and
"php5 +fpm"
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Is It Possible to NSLog C Structs (Like CGRect or CGPoint)?
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Similar to UI, MK, CL prefixes which while all have meanings to it and need to import a respective .h file like :UIKit, MapKit, CoreLocation; Does the CG prefix mean I should import anything? If not is is just a naming convention?!
– Honey
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