SQL Server - Difference Between Clustered and Non-Clustered Indexes in SQL Server

Difference Between Clustered and Non-Clustered Indexes in SQL Server

Q

What Is the Difference Between Clustered and Non-Clustered Indexes in SQL Server?

✍: FYIcenter.com

A

SQL Server 2005 supports two types of indexes: clustered index and non-clustered index. Here are the main differences between them:

One table can only have only one clustered index.
One table can only have many non-clustered index.
A clustered index requires no separate storage than the table storage. It forces the rows to be stored sorted on the index key.
A non-clustered index requires separate storage than the table storage to store the index information.
A table with a clustered index is called clustered table. Its rows are stored in a B-Tree structure sorted.
A table without any clustered indexes is called non-clustered table. Its rows are stored in heap structure unsorted.
The default index created as part of the primary key column is a clustered index.

⇒Understanding and Managing Indexes in SQL Server

⇒⇒SQL Server Database Tutorials

2016-11-13, 731👍, 0💬

Difference Between Clustered and Non-Clustered Indexes in SQL Server
What Is the Difference Between Clustered and Non-Clustered Indexes in SQL Server? SQL Server 2005 supports two types of indexes: clustered index and non-clustered index. Here are the main differences between them: One table can only have only one clustered index. One table can only have many non-clu... 2016-11-13, 732👍, 0💬

Creating an Index for Multiple Columns in SQL Server
How To Create an Index for Multiple Columns in SQL Server? An index for multiple columns works similarly to a sorting process on multiple columns. If an index is defined for two columns, the index key is composed by values from those two columns. A multi-column index will be used to speed up the sea... 2016-11-13, 699👍, 0💬

CREATE CLUSTERED INDEX - Adding Clustered Indexes in SQL Server
How To Create a Clustered Index in SQL Server? If there is no primary key in a table, you can add one clustered index to that table with CREATE CLUSTERED INDEX statement. The tutorial exercise below shows you how to create a clustered index: USE FyiCenterData; GO -- Drop the old table, if needed DRO... 2016-11-13, 680👍, 0💬

Primary Key - Default Indexes of Tables in SQL Server
Is the PRIMARY KEY Column of a Table an Index in SQL Server? If you define a primary key on a table, an index for the primary key column will be created by default. The tutorial exercise below shows you the index created as part of the primary key column of "fyi_links": USE FyiCenterData; GO -- Drop... 2016-11-13, 652👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.