SQL stands for Structured Query Language , it is a database computer language
designed for retrieval and management of data in relational database.
All relational database management system like MySQL , MS Access , Oracle , and SQL server use SQL
as standard database language.
When you are executing an SQL command for any RDBMS, the system determines the best way to carry out your request
and SQL engine figures out how to interpret the task.
There are various components included in the process. These components are
Query Dispatcher, Optimization engines, Classic Query Engine and SQL query engine etc.
Following is a simple digram showing SQL Architecture:
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