Structured Query Language Flashcards, test questions and answers

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What is Structured Query Language?

Structured Query Language (SQL) is a programming language that is used to store, manipulate and retrieve data from databases. It originated in the 1970s, and since then has become the standard for relational database management systems (RDBMS). SQL enables users to create, delete, update and search for records in a database. It can also be used to generate reports from the data stored in the database. SQL is composed of commands that are used to carry out various operations on data within a database. The most common command is SELECT which allows users to select specific columns or rows from a table of data. Other commands include INSERT which adds records into tables, UPDATE which modifies existing records and DELETE which removes records from tables. Additionally, SQL provides functions such as SUM() or AVG() to aggregate values across multiple rows or columns of data. SQL can be used by both business analysts and developers alike as it requires no coding experience to use basic commands like SELECT or INSERT. This makes it an accessible language for anyone who needs access to data stored in databases without having any prior programming knowledge. Furthermore, it provides scalability so users can work with large datasets without being hindered by limitations encountered by other languages such as Excel spreadsheets or Access databases that are limited by size constraints.