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SQL: How to get the count of each distinct value in a column?
I have a SQL table called "posts" that looks like this:
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Reliable timer in a console application
I am aware that in .NET there are three timer types (see Comparing the Timer Classes in the .NET Framework Class Library ). I have chosen a threaded timer as the other types can drift if the main thread is busy, and I need this to be reliable.
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CSS Selector “(A or B) and C”?
This should be simple, but I'm having trouble finding the search terms for it.
Let's say I have this:
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Open a file from Cygwin
Is there an equivalent to OSX open command in cygwin. open opens a file with the default application for that type.
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Vim: Move window left/right?
... possible to “move” a window to the left or right? Eg, similar to <c-w> r or <c-w> x , but left/right instead of up/down?
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Is cout synchronized/thread-safe?
In general I assume that streams are not synchronized, it is up to the user to do appropriate locking. However, do things like cout get special treatment in the standard library?
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Docker EXPOSE a port only to Host
Is docker capable of exposing a port only to the host and not to the outside.
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Default initialization of std::array?
With C++11 std::array , do I have the guarantee that the syntax std::array<T, N> x; will default-initialize all the elements of the array ?
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How to add multiple columns to a table in Postgres?
How do I add multiple columns in one query statement in PostgreSQL using pgadmin3?
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MySQL COUNT DISTINCT
I'm trying to collect the number of distinct visits in my cp yesterday, then count them.
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