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How to request a random row in SQL?
...andom row from a database table. It goes through methods for doing this in MySQL, PostgreSQL, Microsoft SQL Server, IBM DB2 and Oracle (the following is copied from that link):
Select a random row with MySQL:
SELECT column FROM table
ORDER BY RAND()
LIMIT 1
Select a random row with PostgreSQL:
...
What's the best way to store co-ordinates (longitude/latitude, from Google Maps) in SQL Server?
...
I don't know the answer for SQL Server but...
In MySQL save it as FLOAT( 10, 6 )
This is the official recommendation from the Google developer documentation.
CREATE TABLE `coords` (
`lat` FLOAT( 10, 6 ) NOT NULL ,
`lng` FLOAT( 10, 6 ) NOT NULL ,
) ENGINE = MYISAM ;
...
Linux scp 远程文件上传下载，指定端口 - 操作系统(内核) - 清泛网 - 专注C...
...定端口linux-scp1、默认22端口上传、下载文件：scp test tgz root@xxx xxx xxx xxx: tmpscp root@xxx xxx xxx xxx: tmp test tgz 2、指定端口：scp -P8888 root@xxx xxx xxx xxx: tmp test tgz 1、默认22端口上传、下载文件：
scp test.tgz root@xxx.xxx.xxx.xxx:/tmp
scp root@x...
PANIC: Broken AVD system path. Check your ANDROID_SDK_ROOT value [D:\A...
报错如下：PANIC: Broken AVD system path. Check your ANDROID_SDK_ROOT value [D:\APPinventor\AppInventor2\resources\app.asar.unpacked\Emulator\from-Android-SDK]!
How do I change the default port (9000) that Play uses when I execute the “run” command?
...ces like me, add the .settings line to your build.sbt file, after lazy val root = (project in file(".")). For more details on SBT settings, see here: scala-sbt.org/1.0/docs/Custom-Settings.html )
– Cameron Hudson
Mar 27 '19 at 20:22
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Open a file with su/sudo inside Emacs
...
If you use helm, helm-find-files supports opening a file as root with C-c r.
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Service Temporarily Unavailable Magento?
...d if so delete it.
Magento 1.x : maintenance.flag file is in : magento root directory
Magento 2.x : maintenance.flag file is in : var folder
When Magento is performing certain tasks it temporarily creates this file. Magento checks for its existence and if it's there will send users to ...
Can I try/catch a warning?
...t a lot of time debugging a problem in a system where someone had written @mysql_query( '...' ) and the problem was that mysql support was not loaded into PHP and it threw a silent fatal error. It will be safe for those things that are part of the PHP core but please use it with care.
bob@mypc:~$ p...
How can I uninstall an application using PowerShell?
...]$AppGUID
)
try {
$returnval = ([WMICLASS]"\\$computerName\ROOT\CIMV2:win32_process").Create("msiexec `/x$AppGUID `/norestart `/qn")
} catch {
write-error "Failed to trigger the uninstallation. Review the error message"
$_
exit
}
switch ($($returnval.returnvalue)){
0 { "Un...
How to parse the AndroidManifest.xml file inside an .apk package
...etIntents
Most apps are stored in /system/app which is readable without root my Evo, other apps are in /data/app which I needed root to see. The 'path' argument above would be something like: "/system/app/Weather.apk"
sh...