Querying and SQL Functions

Have you ever wondered how computers quickly search, sort, and analyze large amounts of data stored in databases? In Informatics Practices – Class XI, the chapter “Querying and SQL Functions” from the NCERT curriculum helps you understand how Structured Query Language (SQL) is used to retrieve and manipulate data from databases. Through this quiz, you explore how queries help users interact with databases efficiently and accurately.

As you learn this chapter, you discover how SQL queries are written to select, filter, and organize data stored in database tables. Commands such as SELECT, WHERE, and ORDER BY help retrieve specific records from a database. These commands allow users to access meaningful information from large datasets in a structured and systematic way.

You also explore SQL functions, which perform calculations and operations on stored data. These functions include numeric functions, string functions, and date functions that help process values in different formats. Learning how these functions work allows you to manipulate data and obtain useful results from database queries.