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Heroku Postgres - terminate hung query (idle in transaction)
...
(The simple-stupid answer to this question may be ... just restart postgresql. Assuming that's not desirable or not an option ...)
Find the PID by running this sql:
SELECT pid , query, * from pg_stat_activity
WHERE state != 'idle' ORDER BY xact_start;
(The query may need mending dependent of...
What is a lambda (function)?
...can also be broken down and its logic read.
For instance (in C#3):
LinqToSqlContext.Where(
row => row.FieldName > 15 );
LinqToSql can read that function (x > 15) and convert it to the actual SQL to execute using expression trees.
The statement above becomes:
select ... from [tabl...
Is there a performance impact when calling ToList()?
...forming queries against a data source for example a Database using LINQ to SQL then the cost of doing ToList is much more because when you use ToList with LINQ to SQL instead of doing Delayed Execution i.e. load items when needed (which can be beneficial in many scenarios) it instantly loads items f...
Disable ALL CAPS menu items in Visual Studio 2013
... (subtly different from what you get with SuppressUppercaseConversion: the SQL menu gets renamed to Sql)
or hide it completely (and have it appear on ALT key press or mouse over)
share
|
improve ...
How to change the name of a Django app?
...<oldAppName>_modelName RENAME TO <newAppName>_modelName. For mysql too I think it is the same (as mentioned by @null_radix)
(For Django >= 1.7) Update the django_migrations table to avoid having your previous migrations re-run: UPDATE django_migrations SET app='<NewAppName>' WHE...
“媒”出路？如今“媒体+行业”创业机会多得是 - 资讯 - 清泛网 - 专注C/C+...
...渠道和平台日渐式微，更多的传播主体及传播创意被广泛使用，创新型媒体事件不断出现。
互联网技术的赋权，让更多的普通用户拥有了媒体能力，能生产媒体内容并传播出去。这种媒体内容已不仅仅是指传统意义上的文章、...
自动生成Linux下Makefile全攻略（automake原理） - C/C++ - 清泛网 - 专注C/C++及内核技术
...config.h.top ltcf-cxx.sh
Report bugs to <bug-automake@gnu.org>.
使用automake我们只需要写Makefile.am文件，指定那些目录或文件需要参与编译，生成哪些内容等：
AUTOMAKE_OPTIONS=foreign
lib_LTLIBRARIES= liblog.la
noinst_HEADERS = \
logging/LogClas...
Difference between WebStorm and PHPStorm
...or, JavaScript Editor) and adds full-fledged support for PHP and Databases/SQL.
Their forum also has quite few answers for such question.
Basically: PhpStorm = WebStorm + PHP + Database support
WebStorm comes with certain (mainly) JavaScript oriented plugins bundled by default while they need ...
Appropriate datatype for holding percent values?
... Scale & Precision: http://msdn.microsoft.com/en-us/library/aa258832%28SQL.80%29.aspx
0 to 1 vs 0 to 100: C#: Storing percentages, 50 or 0.50?
Decimal vs Numeric: Is there any difference between DECIMAL and NUMERIC in SQL Server?
...
How to use an existing database with an Android application [duplicate]
I have already created an SQLite database. I want to use this database file with my Android project. I want to bundle this database with my application.
...