At this point it is legitimate to ask the following question: which language to use to formulate queries to a database? We need a query language that is a language used to create queries on databases and information systems by users. It is used to make it possible to extract information from the database, through the relevant DBMS, querying the database, and then interfacing with the user and their service requests. The universally used query language is SQL.
SQL is a language for defining and manipulating data. As a manipulation language, SQL allows to select data of interest from the base and to update its content. The queries are used both in the SQL constructs of data definition and in those of updating the database.
SQL is ...
