three level architecture, Database Management System

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why three level architecture had been developed/

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What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.

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Table Handling  In RDBMS more than one table can be tackled at a time by using join operation. Join operation is a relational operation that causes 2 tables with a common domai

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What are the typical phases of query processing

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