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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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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...
Use '=' or LIKE to compare strings in SQL?
...religious) discussion, if you should use LIKE or '=' to compare strings in SQL statements.
9 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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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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Extreme wait-time when taking a SQL Server database offline
...e from live backup) on my dev database, but the 'Take Offline' command via SQL Server Management Studio is performing extremely slowly - on the order of 30 minutes plus now. I am just about at my wits end and I can't seem to find any references online as to what might be causing the speed problem,...
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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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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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 Logic Operator Precedence: And and Or
...who like to consult references (in alphabetic order):
Microsoft Transact-SQL operator precedence
Oracle MySQL 9 operator precedence
Oracle 10g condition precedence
PostgreSQL operator Precedence
SQL as understood by SQLite
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