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Difference between a user and a schema in Oracle?
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From Ask Tom
You should consider a schema to be the user account and collection of all objects therein
as a schema for all intents and purposes.
SCOTT is a schema that includes the EMP, DEPT and BONUS tables with various grants, and
other stuff.
SYS...
In Postgresql, force unique on combination of two columns
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CREATE TABLE someTable (
id serial primary key,
col1 int NOT NULL,
col2 int NOT NULL,
unique (col1, col2)
)
autoincrement is not postgresql. You want a serial.
If col1 and col2 make a unique and can't be null then they make a good prim...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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创建一个测试数据表，sql如下：
CREATE TABLE users (
id INTEGER PRIMARY KEY,
name TEXT,
age INTEGER);
数据表信息
这时，可以查看一下表信息：
插入数据
往 users 表中插入一条测试数据...
How do I install ASP.NET MVC 5 in Visual Studio 2012?
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Microsoft has provided for you on their MSDN blogs: MVC 5 for VS2012. From that blog:
We have released ASP.NET and Web Tools 2013.1 for Visual Studio 2012. This release brings a ton of great improvements, and include some fantastic enhancemen...
val() doesn't trigger change() in jQuery [duplicate]
...x when I change its value with a button, but it doesn't work. Check this fiddle .
9 Answers
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Entity Framework select distinct name
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The way that @alliswell showed is completely valid, and there's another way! :)
var result = EFContext.TestAddresses
.GroupBy(ta => ta.Name)
.Select(ta => ta.Key);
I hope it'll be useful to someone.
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Getting value of public static final field/property of a class in Java via reflection
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thanks. I tried but it didn't work. Exception is thrown at the operation f.getInt(null). I caught it but how come there's an exception?
– Viet
Apr 21 '10 at 18:26
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Example of UUID generation using Boost in C++
I want to generate just random UUID's, as it is just important for instances in my program to have unique identifiers. I looked into Boost UUID , but I can't manage to generate the UUID because I don't understand which class and method to use.
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How do I reword the very first git commit message?
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fork0: That's great, thanks. Curious, is this to be considered "legitimate" practice, for lack of better word. I mean, is it common/recommended to do it like this? Also, can you do this time and time again in cases with faulty commit messages? Reason for asking that is because I f...
Where can I find a NuGet package for upgrading to System.Web.Http v5.0.0.0?
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I have Microsoft ASP.NET Web API 2 Core (id= Microsoft.AspNet.WebApi.Core ) upgraded to v5.0.0.0 as listed above. Looks like I need to remove and re-add them?
– Klaus Nji
Nov 25 '13 at 21:46
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