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Difference between Primary Index, Secondary Index and Clustered Index

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Difference between Primary Index, Secondary Index and Clustered Index
Stechies

Primary Index vs. Secondary Index vs. Clustered Index

Hello Experts,

Is there any one who can tell me what is the exact difference between Primary index & Secondary index and clustered index?

Please share your answers and help me out.

Thanks in advance. 


Comments

  • 03 Jun 2016 3:59 pm

    Indexing is a data structure technique to properly retrieve records from the database files based on some attributes on which the indexing has been done.

    Indexing has following types:

    Primary Index − Primary index is defined on an ordered data file. The data file is ordered on a key field. The key field is generally the primary key of the relation.

    Secondary Index − Secondary index may be generated from a field which is a candidate key and has a unique value in every record, or a non-key with duplicate values.

    Clustering Index − Clustering index is defined on an ordered data file. The data file is ordered on a non-key field.

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