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Is there any difference between GROUP BY and DISTINCT
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MusiGenesis' response is functionally the correct one with regard to your question as stated; the SQL Server is smart enough to realize that if you are using "Group By" and not using any aggregate functions, then what you actually mean is "Distinct" ...
Convert SQLITE SQL dump file to POSTGRESQL
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As usual, if you have foreign keys then you'll probably want to look into set constraints all deferred to avoid insert ordering problems, placing the command inside the BEGIN/COMMIT pair.
Thanks to Nicolas Riley for the boolean, blob, and constraints notes.
If you have ` on your code, as generated ...
jQuery show for 5 seconds then hide
...$("#myElem").show().delay(5000).fadeOut();
If it's not an animation, use setTimeout() directly, like this:
$("#myElem").show();
setTimeout(function() { $("#myElem").hide(); }, 5000);
You do the second because .hide() wouldn't normally be on the animation (fx) queue without a duration, it's just...
Python 3 turn range to a list
...rite(okay, not really) part of the unpacking generalizations is that empty sets now have a literal syntax, {*()}, or as I call it, the one-eyed monkey operator. ;-)
– ShadowRanger
Nov 3 '17 at 0:08
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Vim: Creating parent directories on save
...s: for example, if you are editing a file named /mnt/windows/Documents and Settings/User/_vimrc you will end up having four new directories: /mnt/windows/Documents, ./and, ./Settings and ./Settings/User. And, by the way, you don’t need :execute here.
– ZyX
Se...
How do I clear only a few specific objects from the workspace?
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A useful way to remove a whole set of named-alike objects:
rm(list = ls()[grep("^tmp", ls())])
thereby removing all objects whose name begins with the string "tmp".
Edit: Following Gsee's comment, making use of the pattern argument:
rm(list = ls(patte...
Getting name of windows computer running python script?
...computers on my network that will be running a python script. A different set of configuration options should be used in the script depending on which computer is running this script.
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Checking whether a variable is an integer or not [duplicate]
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If you need to do this, do
isinstance(<var>, int)
unless you are in Python 2.x in which case you want
isinstance(<var>, (int, long))
Do not use type. It is almost never the right answer in Python, since it blocks...
Git diff to show only lines that have been modified
...enerate this with:
git diff --unified=0
or
git diff -U0
You can also set this as a config option for that repository:
git config diff.context 0
To have it set globally, for any repository:
git config --global diff.context 0
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How do I kill background processes / jobs when my shell script exits?
...thus killing also descendants.
Specifying signal EXIT is useful when using set -e (more details here).
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