Interview Questions

1. What are the benefits of Column Stored index?

The benefits of using a non-clustered column store index are:

  • Only the columns needed to solve a query are fetched from disk (this is often fewer than 15% of the columns in a typical fact table)
  • It is easier to compress the data due to the redundancy of data within a column
  • Buffer hit rates are improved because data is highly compressed, and frequently accessed parts of commonly used columns remain in memory, while infrequently used parts are paged out.
By Hena Parveen 2 0
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