Correct spelling for the English word "query language" is [kwˈi͡əɹɪ lˈaŋɡwɪd͡ʒ], [kwˈiəɹɪ lˈaŋɡwɪdʒ], [k_w_ˈiə_ɹ_ɪ l_ˈa_ŋ_ɡ_w_ɪ_dʒ] (IPA phonetic alphabet).
A query language is a high-level programming language used to communicate and interact with databases or data management systems. It serves as an interface for querying, manipulating, and retrieving data from a database using a set of specified commands and syntax. The primary purpose of a query language is to provide a standardized way of accessing and managing databases.
In a query language, users can write queries or statements to define the desired data criteria and structures that need to be retrieved from a database. These queries can include various operations such as searching, filtering, sorting, joining, and aggregating data. The query language interprets these commands and translates them into instructions that the database can understand and execute.
One of the most widely used query languages is Structured Query Language (SQL), which is specifically designed for relational databases. SQL allows users to create and manipulate database schemas, tables, and records, as well as fetch, insert, update, and delete data. SQL has become the de facto standard for database management and is supported by almost all major database systems.
Query languages are crucial for data analysts, developers, and administrators as they provide a powerful and efficient means of accessing and manipulating data stored in databases. The use of query languages eliminates the need for low-level programming and offers a convenient way to interact with and retrieve relevant information from complex data structures.
The word "query" originated from the Latin word "quaerere", meaning "to ask" or "to seek". It entered the English language through Old French as "querir", which meant "to inquire". Eventually, "query" became a noun meaning a question or an inquiry.
The word "language" comes from the Old French word "langage" which is derived from the Latin word "lingua", meaning "tongue" or "speech".
When these two words are combined, "query language" refers to a language or system used for asking questions or making inquiries to retrieve information from a database.