大约有 3,610 项符合查询结果（耗时：0.0192秒） [XML]
How to split a comma-separated value to columns
...does not even solve the issue There are much better approaches around! For SQL-Server 2016+ look for STRING_SPLIT() (which does not carry the fragment's position, a huge fail!) or the really fast JSON-hack. For older version look for the well-known XML-hack (json and xml details here). Or look for o...
Like Operator in Entity Framework?
...sing EF 6.2.x. To this answer if you're using EF Core 2.x
Short version:
SqlFunctions.PatIndex method - returns the starting position of the first occurrence of a pattern in a specified expression, or zeros if the pattern is not found, on all valid text and character data types
Namespace: System...
Get size of all tables in database
I have inherited a fairly large SQL Server database. It seems to take up more space than I would expect, given the data it contains.
...
Multiline strings in VB.NET
...
Multi-line strings are available since the Visual Studio 2015.
Dim sql As String = "
SELECT ID, Description
FROM inventory
ORDER BY DateAdded
"
You can combine them with string interpolation to maximize usefullness:
Dim primaryKey As String = "ID"
Dim inventoryTable As String = ...
Hibernate Criteria returns children multiple times with FetchType.EAGER
...he OrderTransaction, it has to return the same amount of results a regular sql join will return
So actually it should apear multiple times. this is explained very well by the author (Gavin King) himself here:
It both explains why, and how to still get distinct results
Also mentioned in the Hiber...
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
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数据库创建完成。
验证服务
[oracle@dmjyrac1 ~]$ sqlplus /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') ...
List of all index & index columns in SQL Server DB
How do I get a list of all index & index columns in SQL Server 2005+? The closest I could get is:
30 Answers
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Difference between clustered and nonclustered index [duplicate]
...- INT or BIGINT as your default option.
By default, the primary key on a SQL Server table is also used as the clustering key - but that doesn't need to be that way!
One rule of thumb I would apply is this: any "regular" table (one that you use to store data in, that is a lookup table etc.) shoul...
How to strip all non-alphabetic characters from string in SQL Server?
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I knew that SQL was bad at string manipulation, but I didn't think it would be this difficult. Here's a simple function to strip out all the numbers from a string. There would be better ways to do this, but this is a start.
CREATE FUNCT...
How to re-create database for Entity Framework?
...project.
4) Delete Migrations folder by right click and delete.
5) Go to SQL Server Management Studio, make sure the DB for this project is not there, otherwise delete it.
6) Go to Package Manager Console in Visual Studio and type:
Enable-Migrations -Force
Add-Migration init
Update-Database
7...