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Describe the four types of indexes.?

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Question ajoutée par Emad Mohammed said abdalla , ERP & IT Software, operation general manager . , AL DOHA Company
Date de publication: 2015/01/03
Emad Mohammed said abdalla
par Emad Mohammed said abdalla , ERP & IT Software, operation general manager . , AL DOHA Company

A unique primary index is unique and is used to find and store a row. A nonunique primary index is not unique and is used to find a row but also where to store a row (based on its unique primary index). A unique secondary index is unique for each row and used to find table rows. A nonunique secondary index is not unique and used to find table rows.

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