SQL (Structured Query Language) has been developing and evolving since its birth. SQL was first proposed by Raymond F. Boyce and Donald D. Chamberlin of IBM in 1974 as the prototype of the structured query statement SEQUEL in the System R database. Subsequently, SQL gradually became the standard query language for relational databases and has undergone multiple versions of iterative upgrades, such as SQL-86, SQL-89, SQL-92 (also known as SQL2) and SQL-99 (also known as SQL3), which have been continuously optimized and improved in terms of functions and performance.
In the development of SQL, its syntax has gradually become concise and intuitive, and the supported functions have become more and more abundant, including basic operations such as query, insert, update, delete, and advanced functions such as functions, subqueries, and connections. In addition, SQL has also continuously adapted to the trend of technological development, adding support for real-time, scalability, and security to meet the growing needs of data processing.
At present, SQL has become the mainstream language for commercial data storage and query, and is widely used in various database systems. In the future, as technologies such as big data, cloud computing, and artificial intelligence continue to develop, SQL will continue to adapt and evolve, bringing more innovations and opportunities to the field of data management and analysis.