SQL is an acronym for Structured Query Language. It is a commonly-used querying language across numerous transactional databases, although each database has their own syntax or "flavor" of SQL. Some are more powerful or complex than others, and all are custom tuned to whatever database they support. As an example:

MS Access = Jet SQL MS SQL Server = Transact-SQL Oracle = PL/SQL and so on

SQL is an acronym for Standard Query Language. It is a commonly-used querying language across numerous transactional databases, although each database has their own syntax or "flavor" of SQL. Some are more powerful or complex than others, and all are custom tuned to whatever database they support. As an example:

MS Access = Jet SQL MS SQL Server = Transact-SQL Oracle = PL/SQL and so on