What is a non-clustered index?
An example of an AI chatbot conversation about non-clustered indexes in databases.
What is a non-clustered index?
A non-clustered index is a type of database index that improves the speed of data retrieval operations. Unlike a clustered index, it does not alter the physical order of the data in the table.
How does it differ from a clustered index?
The main difference is that a clustered index sorts and stores the data rows in the table based on the index key, while a non-clustered index creates a separate structure that points to the data rows.
When should I use a non-clustered index?
You should use a non-clustered index when you need to optimize queries that search for specific columns without affecting the physical order of the data.
Can you give an example of when it's beneficial?
Sure! If you frequently query a table by a column that isn't the primary key, a non-clustered index on that column can significantly speed up those queries.
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