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COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...ifferent thing, they just share a common token, i.e. *.
An alternate syntax
In fact, if it is not permitted to name a field as same as its table name, RDBMS language designer could give COUNT(tableNameHere) the same semantics as COUNT(*). Example:
For counting rows we could have this:
SELECT COU...
Differences between Intent and PendingIntent
...e. It holds an abstract description of an operation to be performed.
For example: say you have an Activity that needs to launch an email client and send an email. To do this, your Activity would send an Intent with the action ACTION_SEND, along with the appropriate chooser, to the Android Intent Re...
how to mysqldump remote db from local machine
...
One can invoke mysqldump locally against a remote server.
Example that worked for me:
mysqldump -h hostname-of-the-server -u mysql_user -p database_name > file.sql
I followed the mysqldump documentation on connection options.
...
Why does an image captured using camera intent gets rotated on some devices on Android?
...rotated 90 degrees. In this case, the camera software should populate the Exif data with the orientation that the photo should be viewed in.
Note that the below solution depends on the camera software/device manufacturer populating the Exif data, so it will work in most cases, but it is not a 100% ...
Cannot push to Git repository on Bitbucket
...estion).
For those who don't mind HTTPS and who are looking for a quick fix, scroll to the bottom of this answer for instructions under FOR THE LAZY
For those looking to solve the actual problem, follow the instructions below:
Fixing the SSH issue as fast as possible
This is a set of instruction...
Why are static variables considered evil?
... violates the principle that data is encapsulated in objects (that can be extended, information hiding, etc). Statics, in the way you are describing using them, are essentially to use them as a global variable to avoid dealing with issues like scope. However, global variables is one of the defining ...
Python vs Bash - In which kind of tasks each one outruns the other performance-wise? [closed]
... `--> COBOL Program --------'
Typical Linux flow...
Input Disk/SSD/User (runtime) --> sh/bash/ksh/zsh/... ----------> Output Disk/SSD/Screen/Printer
| ^
v ...
IOException: read failed, socket might closed - Bluetooth on Android 4.3
Currently I am trying to deal with a strange Exception when opening a BluetoothSocket on my Nexus 7 (2012), with Android 4.3 (Build JWR66Y, I guess the second 4.3 update). I have seen some related postings (e.g. https://stackoverflow.com/questions/13648373/bluetoothsocket-connect-throwing-exception...
What is an 'endpoint' in Flask?
...ive_greeting', give_greeting)
Let's say your website is located at 'www.example.org' and uses the above view. The user enters the following URL into their browser:
http://www.example.org/greeting/Mark
The job of Flask is to take this URL, figure out what the user wants to do, and pass it on to ...
When is TCP option SO_LINGER (0) required?
... susceptible to this problem.
This isn't a good idea, though - TIME_WAIT exists for a reason (to ensure that stray packets from old connections don't interfere with new connections). It's a better idea to redesign your protocol to one where the client initiates the connection close, if possible.
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