Tag Archives: SQL Advance Concepts

Rebuild And Reorganization of Indexes

By | December 31, 2012

Rebuild and  Reorganization of Indexes:- SQL Server has the ability of maintaining the indexes whenever we makes changes (update, Insert, Delete) in the tables. Over a period of time, the may causes the fragmentation on the table in which  the logical ordering based on the key value pairs does not match with the physical ordering inside the data… Read More »

Fragmentation in SQL Server

By | December 31, 2012

Fragmentation:- Fragmentation can be defined as condition where data is stored in a non continuous manner. In can be defined into two types 1. Internal Fragmentation 2. External Fragmentation Internal Fragmentation:- In this fragmentation, there exists a space between the different records within a page. This is caused due to the Insert, delete or Update process… Read More »

SQL Server- Output clause

By | January 22, 2012

Output Clause:- The SQL SERVER 2005 gives us an Output Clause which gives us the information about each row affected by the Insert, Update , Delete and Merge statement. It is more useful than @@scope_Identity and @@Identity column since these global variables gives us the information about the last inserted identity column value, but the Output clause gives us… Read More »