Structured Query Language (SQL) is the standard language for which type of database?

Structured Query Language (SQL) is specifically designed for managing and manipulating data in relational databases. A relational database organizes data into tables, which can be linked—or related—based on defined relationships. SQL provides a standardized way to perform various operations such as querying data, updating records, inserting new data, and deleting existing records within these tables.

The relational database model relies on principles of set theory and first-order predicate logic, allowing for complex queries and operations. SQL's structure supports these capabilities effectively, making it the ideal language for relational databases. Its widespread adoption and standardization across the industry demonstrate its alignment with relational database management systems (RDBMS).

In contrast, other types of databases, such as hierarchical, network, and object-oriented, do not use SQL as their standard query language. Hierarchical databases structure data in a tree-like format, network databases allow multiple relationships among data, and object-oriented databases integrate object-oriented programming concepts. Each of these database types employs different query methods and languages suited to their specific architectures and requirements.