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常用Sql - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
常用Sqlmysql：drop table if exists tablename;不能写成drop table tablename if exists tablename;mysql：建立索引SqlCREATE TABLE t...mysql：drop table if exists tablename;
不能写成
drop table tablename if exists tablename;
mysql：建立索引Sql
CREATE TABLE tablename (
`ID...
Sql server默认的端口是多少？如何开启远程连接？ - 更多技术 - 清泛网 - ...
Sql server默认的端口是多少？如何开启远程连接？默认是1433，可以在配置管理器中查看：需要开放1433端口，可以参考《Windows、Linux开放指定端口》。另外，开启远程连接还需要启用TCP IP，...默认是1433，可以在配置管理器中查看...
What is the difference between char, nchar, varchar, and nvarchar in SQL Server?
...tion error (where X denotes a number that is the same in both instances).
SQL Server 2012 adds SC (Supplementary Character) collations that support UTF-16. In these collations a single nvarchar character may take 2 or 4 bytes.
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How do I UPDATE from a SELECT in SQL Server?
In SQL Server , it is possible to insert rows into a table with an INSERT.. SELECT statement:
35 Answers
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Hidden Features of MySQL
I've been working with Microsoft SQL Server with many years now but have only just recently started to use MySQL with my web applications, and I'm hungry for knowledge.
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Difference between FOR and AFTER triggers?
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@Ben is absolutely right.
Here is MSDN article Exploring SQL Server Triggers
A paragraph from the article:
That syntax is also acceptable in older versions of SQL Server. However, now that there are two types of triggers in SQL Server 2000, I prefer to refer to FOR triggers as AFT...
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is no
... easy to determine whether that is the case. Connect to your database with Sql Server Management Studio. In the left pane right-click on the server node and select Activity Monitor. Take a look at the running processes.
Normally most will be idle or running. When the problem occurs you can identify ...
SQL Server 2008: how do I grant privileges to a username?
I need to be able to establish an ODBC connection through SQL Server authentication.
3 Answers
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How to version control a record in a database
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Upgrade to SQL 2008.
Try using SQL Change Tracking, in SQL 2008. Instead of timestamping and tombstone column hacks, you can use this new feature for tracking changes on data in your database.
MSDN SQL 2008 Change Tracking
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SQL Server: Difference between PARTITION BY and GROUP BY
... Northwind, which may or may not be installed by default depending on your sql server version. If not you can search for it on s downloads page.
– Fetchez la vache
Jan 17 '14 at 9:14
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