Understanding relational algebra aids query optimization from "summary" of SQL and Relational Theory by C. Date
Understanding relational algebra aids query optimization is a crucial concept in the world of databases. Relational algebra provides a theoretical framework for understanding and manipulating relational data. By applying the principles of relational algebra, database designers and administrators can optimize queries to improve performance and efficiency. Relational algebra is based on a set of mathematical operations that can be used to manipulate relations. These operations include selection, projection, join, and union, among others. By understanding how these operations work and how they can be combined, database professionals can write more efficient queries that return the desired results in a timely manner. Query optimization is the process of improving the performance of a database query by reducing the amount of time and resour...
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