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SQL select only rows with max value on a column [duplicate]
...ELECT id, rev, contents,
ROW_NUMBER() OVER (PARTITION BY id ORDER BY rev DESC) rank
FROM YourTable) a
WHERE a.rank = 1
Added in SQL standard ANSI/ISO Standard SQL:2003 and later extended with ANSI/ISO Standard SQL:2008, window (or windowing) functions are available with...
Unicode, UTF, ASCII, ANSI format differences
... many consumer applications will need to be aware of non-BMP characters in order to support emojis.
UTF-8: Variable length encoding, 1-4 bytes per code point. ASCII values are encoded as ASCII using 1 byte.
UTF-7: Usually used for mail encoding. Chances are if you think you need it and you're not do...
How do I provide a username and password when running “git clone git@remote.git”?
...r, it may be easier to just prepend all the above commands with a space in order to prevent them being stored to begin with.
Note that I'm no pro, so the above may not be secure in the sense that no trace would be left for any sort of forensic work.
...
Why is Linux called a monolithic kernel?
...onolithic sub-systems need to synchronize multiple values at one time. In order to do this, they must use locks and will suffer from Amdahl's law when extended to parallel architectures. The counter is that microkernels result in lots of IPC messages.
A major development is the use of lock-free p...
Use of Application.DoEvents()
... there is no way for the user to make your program run code in a different order. It will execute predictably, just like it did when you tested your code. It makes dialogs extremely annoying; who doesn't hate having a dialog active and not being able to copy and paste something from another window? ...
Why wasn't PyPy included in standard Python?
... As of 2018, I can confirm that I have seen speedups of roughly an order of magnitude in different sympy uses
– Frédéric Grosshans
Mar 21 '18 at 14:27
1
...
Find a string by searching all tables in SQL Server Management Studio 2008
... FROM @Result AS R
GROUP BY R.TableName) TB
ORDER BY TB.Sql
OPEN @tableCursor
FETCH NEXT FROM @tableCursor INTO @Sql, @TableName, @ColumnName
WHILE (@@FETCH_STATUS = 0)
BEGIN
PRINT @Sql
SELECT @TableName AS [Table],
@C...
Getting vertical gridlines to appear in line plot in matplotlib
...‘x’, or ‘y’ to control which set of
gridlines are drawn.
So in order to show grid lines for both the x axis and y axis, we can use the the following code:
ax = plt.gca()
ax.grid(which='major', axis='both', linestyle='--')
This method gives us finer control over what to show for grid l...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
...e item there is a code: 966-347Z"
You have to provide other examples, in order to better describe what is a match and what is not a desired match:
--i.e:
"My phone is +39-128-3905 , and the phone product id is 966-347Z" -> "966-347Z"
The phone number is not a product id, this may be an impor...
What's is the difference between train, validation and test set, in neural networks?
...
Testing Set: this data set is used only for testing the final solution in order to confirm the actual predictive power of the network.
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