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What is the string concatenation operator in Oracle?
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CONCAT is also compatible with other DBMSes (at least MySQL and Postgres).
– lapo
Oct 13 '15 at 15:07
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Transaction isolation levels relation with locks on table
...Spanish).
By the way, you can set the isolation level on RDBMS as well:
MySQL isolation level,
SQL Server isolation level
Informix isolation level (Personal Note: I will never forget about SET ISOLATION TO DIRTY READ sentence.)
and on and on...
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How to Join to first row
...ved table whichever way you want and use TOP 1 in SQL Server or LIMIT 1 in MySQL
– stifin
Jun 9 '15 at 10:39
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How to get the absolute coordinates of a view
... gives coordinates to specific view, i need coordinates of clicked view in root layout..
– Aniket
Jun 18 '13 at 16:09
20
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Git - fatal: Unable to create '/path/my_project/.git/index.lock': File exists
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Did you accidentally create the repository using the root user?
It just happens that I created the git repository as the root user.
I deleted the git repository and created it again without sudo and it works.
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NullPointerException accessing views in onCreate()
...ent onCreateView(), calling findViewById() on the inflated fragment layout rootView:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
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Android Studio Google JAR file causing GC overhead limit exceeded error
... new issue is caused by the latest version of Android.
Go to your project root folder, open gradle.properties, and add the following options:
org.gradle.daemon=true
org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
org.gradle.parallel=true
o...
How to define custom configuration variables in rails
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# config/initializers/load_config.rb
APP_CONFIG = YAML.load_file("#{Rails.root}/config/config.yml")[Rails.env]
# application.rb
if APP_CONFIG['perform_authentication']
# Do stuff
end
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im...
When does a process get SIGABRT (signal 6)?
... other signal. Of course, the sending process needs to run as same user or root.
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Apple Pay入华遇阻 只因BAT太受欢迎？ - 资讯 - 清泛网 - 专注C/C++及内核技术
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BAT的解决之道：得民心者得天下
而移动支付玩家又是如何做的呢？很显然BAT三家都意识到了这一问题，在解决方案上却各有千秋。
支付宝：补贴和导流依旧是拿手戏
先从支付宝来讲，得益于在电商时代积累的庞大用户体系...