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Database Essentials
OpenEdge RDBMS : OpenEdge architecture : Blocks


A block is the smallest unit of physical storage in a database. Many types of database blocks are stored inside the database, and most of the work to store these database blocks happens behind the scenes. However, it is helpful to know how blocks are stored so that you can create the best database layout.
The most common database blocks are divided into three groups:
*Data blocks
*Index blocks
*Other block types
* Data blocks
* Index blocks