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How to do an INNER JOIN on multiple columns
I'm working on a homework project and I'm supposed to perform a database query which finds flights either by the city name or the airport code, but the flights table only contains the airport codes so if I want to search by city I have to join on the airports table.
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Bash if statement with multiple conditions throws an error
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Use -a (for and) and -o (for or) operations.
tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html
Update
Actually you could still use && and || with the -eq operation. So your script would be like this:
my_error_flag=1
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Cannot kill Python script with Ctrl-C
...blem - once the main thread has started your threads, there's nothing else for it to do. So it exits, and the threads are destroyed instantly. So let's keep the main thread alive:
import time
while True:
time.sleep(1)
Now it will keep print 'first' and 'second' until you hit Ctrl+C.
Edit: as...
How to use the 'sweep' function
...ow or by column, and the other input of the operation is a different value for each row / column. Whether you operate by row or column is defined by MARGIN, as for apply(). The values used for what I called "the other input" is defined by STATS.
So, for each row (or column), you will take a value f...
git branch -d gives warning
...e. you rebased origin/old_branch onto origin/master. Even if it was a fast-forward, this will generate a new SHA for each new commit from origin/old_branch, causing git to see the original SHA's in your local old_branch as unmerged after pulling the changes to your local master branch. You can see t...
vs in Generics
What is the difference between <out T> and <T> ? For example:
5 Answers
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Git: which is the default configured remote for branch?
...akes me wonder: How do I find out which is the "default configured remote for your current branch" ? And how do I set it?
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How can I extract a good quality JPEG image from a video file with ffmpeg?
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Use -qscale:v (or the alias -q:v) as an output option.
Normal range for JPEG is 2-31 with 31 being the worst quality.
The scale is linear with double the qscale being roughly half the bitrate.
Recommend trying values of 2-5.
You can use a value of 1 but you must add the -qmin 1 output option ...
How do I use vi keys in ipython under *nix?
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I came here to post this answer -- thanks for beating me to it :)
– Jason Sundram
Jul 16 '16 at 20:46
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How can I convert a string to upper- or lower-case with XSLT?
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For XSLT 1.0 you'd have to add more to the smallcase/uppercase variables or use an extension function.
– Jon W
Feb 25 '09 at 15:09
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