SQLstandardens

SQLstandardens is a term that refers to the standardized versions of the SQL (Structured Query Language) programming language. These standards are developed and maintained by organizations such as the International Organization for Standardization (ISO) and the American National Standards Institute (ANSI). The primary goal of these standards is to ensure interoperability and portability of SQL code across different database management systems (DBMS).

The evolution of SQL standards has been a continuous process, with major revisions occurring periodically. Key versions include SQL-86, SQL-89, SQL-92, SQL:1999, SQL:2003, SQL:2008, SQL:2011, SQL:2016, and more recent updates. Each standard introduces new features, clarifies existing ones, and aims to provide a more robust and comprehensive language for database interaction.

While a standard exists, most DBMS vendors implement their own specific dialects of SQL. These dialects often include proprietary extensions and may deviate from the official standard in certain areas. This means that SQL code written for one database system might not run without modification on another, even if both systems claim to be SQL-compliant. Understanding the nuances of different SQL standards and vendor implementations is crucial for developers working with diverse database environments. The SQLstandardens provides a common foundation, but practical application often requires knowledge of specific database system behaviors.