Chapter 1. Overview of PL/SQL Programming Concepts

Structured Query Language (SQL) is a language that has been widely accepted and adopted for accessing relational databases. This language allows users to perform database operations such as reading, creating, modifying, and deleting the data. Since the summer of 1970, when Dr. E.F. Codd published the paper A Relational Model of Data for Large Shared Data Banks for the ACM journal, the language has matured comprehensively as an industry standard. With its broad range of features and easy adaptation to enterprise environments, the SQL language has been typically regarded as the most reliable language for interacting with relational databases.

PL/SQL was developed in 1991 by Oracle Corporation as ...

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