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How to change the default collation of a table?
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To change the default character set and collation of a table including those of existing columns (note the convert to clause):
alter table <some_table> convert to character set utf8mb4 collate utf8mb4_unicode_ci;
Edited the answer, thanks to the prompt...
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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How to open files relative to home directory
...is a mere convention; indeed, if you look at the documentation for File.expand_path, it correctly interprets the tilde, but it's a feature of the function itself, not something inherent to the underlying system; also, File.expand_path requires the $HOME environment variable to be correctly set. Whic...
“git diff” does nothing
...figuration error somewhere, but I can't figure out where. Regular git commands appear to work fine, but "git diff" does nothing. To be safe, I removed external diff tools from my .gitconfig file. This was installed via MacPorts and is the lates version (1.7.2.2).
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Explanation of JSHint's Bad line breaking before '+' error
... But when the expression is within some parenthesis the warning persists. And, that makes me sad.
– Ben Hyde
Mar 25 '14 at 15:35
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How do I retrieve the number of columns in a Pandas data frame?
How do you programmatically retrieve the number of columns in a pandas dataframe? I was hoping for something like:
6 Answer...
++someVariable vs. someVariable++ in JavaScript
... the value of the expression is the original value"
Now when used as a standalone statement, they mean the same thing:
x++;
++x;
The difference comes when you use the value of the expression elsewhere. For example:
x = 0;
y = array[x++]; // This will get array[0]
x = 0;
y = array[++x]; // Thi...
How to format a number 0..9 to display with 2 digits (it's NOT a date)
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This will generate an Android Linter Warning "Implicitly using the default locale is a common source of bugs: Use String.format(Locale, ...) instead"
– Christopher Stock
Feb 15 '19 at 10:36
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How to copy part of an array to another array in C#?
...wouldn't add explicit names unless it made the code significantly clearer, and I'm not sure (in this case) that the parameter names by themselves would achieve that.
– Marc Gravell♦
Aug 6 '12 at 17:57
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SQLite - How do you join tables from different databases?
I have an application that uses a SQLite database and everything works the way it should. I'm now in the process of adding new functionalities that require a second SQLite database, but I'm having a hard time figuring out how to join tables from the different databases.
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