SQL Server 2008 different editions...!

SQL Server 2008 is available in the following editions:

􀁑 Enterprise Designed for the largest organizations and those needing to leverage the

full power of the SQL Server 2008 platform.

􀁑 Standard Designed for small and midsized organizations that do not need all the

capabilities available in SQL Server 2008 Enterprise.

􀁑 Workgroup Suitable for small departmental projects with a limited set of features.

􀁑 Express A freely redistributable version of SQL Server that is designed to handle

the needs of embedded applications as well as the basic data storage needs for

server-based applications, such as Web applications with a small number of users.

platform, please refer to the book Microsoft SQL Server 2008 Step by Step (Microsoft Press,

2008), which provides overview chapters on every SQL Server 2008 feature.

12 CHAPTER 1 Installing and Confi guring SQL Server 2008

􀁑 Compact Designed as an embedded database.

􀁑 Developer Designed for use by developers in creating SQL Server applications.

SQL Server 2008 Developer has all the features and capabilities as SQL Server 2008

Enterprise, except that it is not allowed to be used in a production environment.

􀁑 Evaluation Designed to allow organizations to evaluate SQL Server 2008. SQL Server

2008 Evaluation has all the features and capabilities as SQL Server 2008 Enterprise,

except that it is not allowed to be used in a production environment and it expires

after 180 days.

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Good Microsoft SQL Server information sites.

Good Microsoft SQL Server information sites.

http://www.mssqlcity.com/Articles/Replic/SetupSR/SetupSR.htm

http://www.w3schools.com/sql/

http://www.1keydata.com/sql/

http://vyaskn.tripod.com/iq.htm

http://users.telenet.be/pecop/sqlr/sqlbasics.html

http://blog.sqldbasupport.com/

http://databases.aspfaq.com/database/should-i-use-a-view-a-stored-procedure-or-a-user-defined-function.html

http://www.aspfaq.com/downloads.asp

http://www.java2s.com/Code/SQLServer/CatalogSQLServer.htm

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Which system database of which we can't take the backup?

We can't take the backup of the tempdb database and the tempdb database is a universal "scratch" area within SQL Server. The SQL Server engine utilizes tempdb as a temporary storage area when doing sorting and aggregation operations. Applications can also utilize tempdb through the use of temporary tables, procedures, and cursors. You can look at tempdb as serving a function similar to the paging file within Windows. Anything created within tempdb, by its very nature, is temporary. When you restart a SQL Server instance, tempdb is wiped out and re-created.

You should never create any object that is required to be persistent within tempdb, because you will lose anything stored in tempdb when the instance is restarted.

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How to get list of Database Users

The below query will list of out list of Database user's

use ReportServer

sp_helpuser

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The basic differences between Primary Key and Unique key are as follows

 1) By default Primary Key will generate Clustured Index whereas Unique Key will Generate Non-Clustured Index.

2) Primary Key is a combination of Unique and NOT NULL Constraints so it can’t have duplicate values or any NUll Whereas for Oracle UNIQUE Key can have any number of NULL whereas for SQL Server It can have only one NULL

3) A table can have only one PK but It can have any number of UNIQUE Key.

Copy data from one table to another table

The following is the query to copy the data from one table to another table.

select * into employee2 from employee1

Here Table employee1 is existing table and take backup in another table named : employee1. It will automatically will create the another table employee1 with the same structure. 

Microsoft Database mirroring

•          The database mirroring is implement only one database at time
•          The selected database must be in full recovery mode only (Other recovery mode won't work)
•          You can't mirror on system databases like (master, msdb, tempdb, model)

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