Query languages are computer languages used to make queries in databases and information systems. Broadly, query languages can be classified according to whether they are database query languages or information retrieval query languages. It refers to any computer programming language that requests and retrieves data from database and information systems by sending queries. The difference is that a database query language attempts to give factual answers to factual questions, while an information retrieval query language attempts to find documents containing information that is relevant to an area of inquiry.
Query Languages are computer languages used to make queries in databases and information systems. It works on user entered structured and formal programming command based queries to find and extract data from host databases. It is a specialized programming language for searching and changing the contents of a database.
Characteristics of SQL –
a) SQL is an ANSI and ISO standard computer language for creating and manipulating databases,
b) SQL allows the user to create, update, delete, and retrieve data from a database,
c) SQL is very simple and easy to learn,
d) SQL works with database programs like DB2, Oracle,
e) MS Access, Sybase, MS SQL Server etc.