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Sql Server Indexes

"SQL Server Indexes A database index is similar to an index in a book – it is comprised of a lookup value, and a number identifier that corresponds to the row number in a table. In SQL Server, there are two kinds of indexes – clustered and non-clustered. Clustered Indexes require that the data in the table is physically sorted in the order of the index. Because the data in a table can be physically sorted only one way, there can be at most only one clustered index per table. Non clustered in........ Read More

Sql Server Triggers

Triggers are stored procedures which are fired when data is modified in an underlying table. They can evaluate data being added to a table for validation purposes, or can make changes in that or other fields depending on the value of that data. You can use them even to execute a separate stored procedure, or to roll back a data modification or an entire transaction. In earlier versions of SQL Server, triggers were used to maintain referential integrity. In current versions, constraints and forei........ Read More

Sql Server Security

There are several levels of security to SQL Server. At the a base level, in order to be granted get access to a SQL Server, a user is required to have a login account. There are two modes of security to SQL Server, distinguished by which program provides the authentication. NT Authentication provides that Windows NT (and/or its successors) verify verifies the identity of a user logging in. In this mode, the SQL Server will ‘trust' that Windows NT has verified that the user is who he says he is........ Read More

Sql Server 2000 Data Types

SQL Server requires that each variable and column in a table should be defined with respect to the type of data it will store. From a bit to a huge image and binary storage types, the allocation is supposed to help the user conform to the data required, and help the engine allocate space and processing speed efficiently. Built-in data types SQL Server 2000 recognizes the following built in data types: Data Types Description bigint Integer data from -2^63 through 2^63-1 int Inte........ Read More

Sql Server System Stored Procedures

System Stored Procedures System stored procedures are packaged with SQL Server. Many procedures are used to administer SQL Server, but some are utilities that can be profitablly used by developers. They are global, and can be called from any database application without their fully qualified name. (They are all owned by dbo.) . They are all stored in the Master database, and have the prefix sp_. This is a reason why it is considered unwise to name local stored procedures with the sp_ prefix. The........ Read More

Sql Server Stored Procedures

"SQL Server Stored Procedures Stored Procedures are SQL statements saved in a database as a n object. They can be called interactively through the Query Analyzer, and by other stored procedures. They can be defined with parameters to make them more flexible, and can return result sets and status codes. Their advantages include: The ability to restrict access to the underlying tables; Increased security in a networked environment; The vehicle to modularize programming on the database end o........ Read More


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