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Can you use an alias in the WHERE clause in mysql?
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WHERE (sum(reviews.rev_rating)/count(reviews.rev_id))>5
BUT! Not all expressions will be allowed - using an aggregating function like SUM will not work, in which case you'll need to use a HAVING clause.
From the MySQL Manual:
It is not allowable to refer to a
column alias in a WHERE...
Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
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@Jasen That's totally clear. Just wanted to emphasize that the answer "But if you have non-unique entries on your table. Here is the how to add unique constraint on your table." will not work. Non-unique entries must of course always be conso...
express.js - single routing handler for multiple routes in a single line
Is there a way to make this on a single function call?
6 Answers
6
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Can you grab or delete between parentheses in vi/vim?
...isual mode, then you specify that you want to go 2 levels of parens up. Finally the a) selects "a block". After that you can use d or x to delete, etc.
If you don't want to include the outer parens, you can use "inner block" instead:
v2i)
See :help object-select for the complete list of related ...
Visual Studio Immediate window: how to see more than the first 100 items
..., If you add your object to the watch window. Expand the properties, where all are displayed. Then Ctrl-A and Copy. You can then paste in excel to get an organized list of properties and their values.
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Set timeout for ajax (jQuery)
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Make sure to wrap the entire $.ajax call with a try/catch. Aborts are not caught by jQuery and will be thrown outside of the $.ajax call.
– justdan23
Dec 13 '19 at 15:08
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How to process SIGTERM signal gracefully?
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@Mausy5043 Python allows you to not have parenthesis for defining classes. Although it's perfectly fine for python 3.x, but for python 2.x, best practice is to use "class XYZ(object):". Reason being: docs.python.org/2/reference/datamodel.html#...
How to get jQuery to wait until an effect is finished?
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You can specify a callback function:
$(selector).fadeOut('slow', function() {
// will be called when the element finishes fading out
// if selector matches multiple elements it will be called once for each
});
Documentation here.
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Pushing from local repository to GitHub hosted remote
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Are you actually typing '~origin~' or just 'origin'? You'd best avoid tilde as it means something to Git.
– GoZoner
May 13 '12 at 21:01
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CSS3 Continuous Rotate Animation (Just like a loading sundial)
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A typical copy-paste error. Thanks a lot! (I actually got my css from shareaholic and because of the wrongly named property, it used the default ease timing function).
– doekman
Feb 15 '12 at 21:24
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