Index In SQL Server Part 1

Index is used to find data from the table quickly. An index is created on views and tables. It is similar to the book index.
If you apply index it will improve the query performance drastically. If there is no index then the query engine checks every row from beginning to end and it will require time which is bad and this is called a Table scan.
You can create an index in the SQL server in 2 ways. 1) by Query 2) Graphical Interface.
The index is a special kind of data structures which is...

Index In SQL Server Part 1