From Microsoft: "Structured Query Language, invented at IBM in the 1970s. It is more commonly known by its acronym, SQL .."
Microsoft. Structured Query Language (SQL). [2017-10-10]. (原始内容存档于2016-03-12).
From Oxford Dictionaries: "Definition of SQL - abbreviation, Structured Query Language, an international standard for database manipulation."
Oxford Dictionaries. SQL. [2017-10-10]. (原始内容存档于2016-08-03).
From Oxford Dictionaries: "Definition of SQL - abbreviation, Structured Query Language, an international standard for database manipulation."
Oxford Dictionaries. SQL. [2017-10-10]. (原始内容存档于2016-08-03).
From Microsoft: "Structured Query Language, invented at IBM in the 1970s. It is more commonly known by its acronym, SQL .."
Microsoft. Structured Query Language (SQL). [2017-10-10]. (原始内容存档于2016-03-12).