大约有 41,000 项符合查询结果（耗时：0.0376秒） [XML]
LINQ: Distinct values
...d it should be okay:
var query = doc.Elements("whatever")
.Select(element => new {
id = (int) element.Attribute("id"),
category = (int) element.Attribute("cat") })
.Distinct();
If you're trying to get a dis...
What is the difference between “AS” and “IS” in an Oracle stored procedure?
...lied to make your code more readable:
FUNCTION f IS ...
CREATE VIEW v AS SELECT ...
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How to pull a random record using Django's ORM?
...on't know about other databases).
order_by('?')[:N] will be translated to SELECT ... FROM ... WHERE ... ORDER BY RAND() LIMIT N query.
It means that for every row in table the RAND() function will be executed, then the whole table will be sorted according to value of this function and then first N...
Case insensitive Query with Spring CrudRepository
With Spring CrudRepository Query; I want to select "DeviceType" entities with it's "name" property. But following query select the entitles on case sensitive manner. How I make it case insensitive way. Thanks.
...
HTTP Error 403.14 - Forbidden - The Web server is configured to not list the contents of this direct
...d features" in Server Manager.
In Wizard scroll down to the Web server and select : Web Server -> Application Development. Select all except CGI from the list as shown in the screen shot
Finally hit next and Install.
Restart IIS
Your website may start working.
...
Java's Virtual Machine and CLR
... a fixed collection of value types (byte, short, int, long, float, double, char, boolean) and only allows users to define new reference-types (classes).
The CLR provides support for declaring and manipulating pointers. This is especially interesting because both the JVM and the CLR employ strict gen...
Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...nolog
SQL> conn / as sysdba
SQL> startup
查看数据库状态
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ WRITE
查看数据库字符集
SQL> select userenv('language') from dual;
SQL> select * from props$ where name='NLS_CHARACTERSET';
SQL> select * ...
Picking a random element from a set
... the buckets that make up the hashset, which allows us to more efficiently select a random elements. If random elements are necessary in Java, it might be worthwhile to define a custom hash set that allows the user to look under the hood. See [boost's docs][1] for a little more in this. [1] boos...
Android: allow portrait and landscape for tablets, but force portrait on phone?
...h their bools.xml files.
values-sw600dp
First of all, from the Project tab select the Project (rather than Android) filter in the navigator.
Then right click the app/src/main/res directory. Choose New > Android Resource Directory.
Select Smallest Screen Width, and then press the >> button....
MySQL remove all whitespaces from the entire column
...
Working Query:
SELECT replace(col_name , ' ','') FROM table_name;
While this doesn't :
SELECT trim(col_name) FROM table_name;
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