A database management system (DBMS) is software made up of integrated services that create, use, and maintain databases. Standards for DBMSs chiefly establish shared terminology and agreed interfaces or language behavior—most notably the SQL standards series—rather than requiring every product to use the same internal design or support every feature.
What does DBMS mean?
DBMS stands for database management system. ISO/IEC TR 10032:2003 defines it as “a collection of integrated services which support database management and together support and control the creation, use and maintenance of a database.” In practical terms, a DBMS provides services for working with stored data and managing that data over time. ISO/IEC TR 10032:2003 treats database management as including database creation, use, and maintenance.
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How is a database different from a DBMS and SQL?
These terms refer to different things:
- Database: the organized data being managed.
- DBMS: the software and services that manage the database.
- SQL: a standardized language used with relational database management systems to define and manipulate data.
SQL is not itself a DBMS, and a database is not the software that manages it. ANSI describes SQL as the standard language for relational database management systems. ANSI’s overview of the standards process explains its role in the standards system.
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What are the standards for database management systems?
“Standards for DBMSs” can mean standards for terminology and reference models, as well as standards for interfaces and languages. ISO/IEC TR 10032:2003 provides terminology and a reference model for database management. For relational systems, the best-known standards family is ISO/IEC 9075, which specifies SQL.
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Data-management standards describe services available at an interface; they do not prescribe the internal implementation of those services. A standard can therefore help different systems communicate or support shared operations without requiring identical database engines.
What does the SQL standard cover?
ISO/IEC 9075 is a series of related SQL specifications, not one document covering every detail of every DBMS. Its parts have distinct scopes. The 2023 catalog entries illustrate two of those roles:
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| Document | Role | Scope stated by the source |
|---|---|---|
| ISO/IEC 9075-1:2023, SQL/Framework | Framework for the series | Establishes the framework used by the other parts of the series. ISO listing |
| INCITS/ISO/IEC 9075-2:2023, SQL/Foundation | SQL language specification | Includes capabilities for creating, accessing, maintaining, controlling, and protecting SQL data. ANSI Standards Store catalog entry |
These are examples from the 2023 catalog, not a claim that the two documents are interchangeable or that they are the only parts of the series.
Does SQL conformance make all DBMSs behave alike?
No. A standard specifies agreed language structures and operations within its scope, but it is not a complete specification of every product’s behavior. DBMS products can differ in which editions or optional parts they support, and they may offer product-specific extensions. A shared SQL standard is useful for interoperability, but it does not guarantee that a query or feature will work identically everywhere.
For a named product, check its documentation for the SQL edition, standard parts, optional features, and extensions it supports. The standards information alone does not establish that a particular DBMS fully conforms.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is “ANSI SQL,” and who sets the SQL standard?
“ANSI SQL” is common shorthand for standardized SQL, especially in American contexts, but it can give the wrong impression about who develops the international specification. ANSI says it does not develop standards; it accredits standards developing organizations. The international SQL standard is developed through ISO/IEC, while INCITS adopts ISO/IEC 9075 documents into American National Standards. ANSI’s explanation of the standards process describes that distinction.
In short, ISO/IEC 9075 is the international SQL standards series; ANSI’s role is accreditation, and the U.S. national adoption process involves INCITS.
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