Lec-96: Types Of Indexes | Most Important Video on Indexing
Gate Smashers・4 minutes read
The video discusses primary, clustered, and secondary indexes, explaining how primary index is created with a primary key, clustered index is for ordered data without a key, and secondary index is for unordered data with or without a key.
Insights
- Primary index is automatically generated when a primary key is assigned in a table, ensuring efficient data retrieval based on the key value.
- Clustered indexes are essential for maintaining order in data sets without a key, while secondary indexes play a crucial role in accessing unordered data efficiently, with or without a key.
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Recent questions
What are the types of indexes?
Primary, clustered, secondary indexes.
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Summary
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Understanding Primary, Clustered, and Secondary Indexes
- Types of indexes discussed in the video include primary, clustered, and secondary indexes, with primary index used when data is ordered and has a key value, clustered index used for ordered data without a key, and secondary index used for unordered data with or without a key.
- Primary index is automatically created when a primary key is applied in a table, while clustered index is used for ordered data without a key, and secondary index is utilized for unordered data with or without a key, as explained in the video.
