What is Columnar storage DBs and what are their difference as compared to traditional Row based DBs.

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What is Columnar storage DBs and what are their difference as compared to traditional Row based DBs.

please help me

Posted 26-Sep-11 2:03am

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Mehdi Gholam · Answer 1 · 2011-09-26T02:06:00

Solution 1

Column storage DB store data in in column order (think a normal table but sideways), usually in a series of bitmap structures. The main differentiator is optimized storage and speed of querying huge amounts of data (100Gb).

Their draw back is the update performance.

Posted 26-Sep-11 2:06am

Mehdi Gholam