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Part B · Database Management System · Chapter 11 · CBSE Class X (2026–27)

Queries in LibreOffice Base

Use a query to retrieve selected records and fields from one or more tables. Create queries with a wizard or Design View, apply single-field or multiple-field criteria, use wildcards and perform calculations with numerical data.

What to learn

Use a query to retrieve selected records and fields from one or more tables. Create queries with a wizard or Design View, apply single-field or multiple-field criteria, use wildcards and perform calculations with numerical data.

Practical activity

From a Marks table, create a query that returns students with Science marks above 80. Add a calculated total field, then edit the query to include a second criterion for class.

Use your school’s prescribed software version and teacher instructions. Keep personal information out of public practice files.

Solved CBSE-style questions

These questions and answers are original practice written for this guide; they are not copied from past papers.

Question 1

When would you use a query instead of sorting a table?

A query selects records and fields that meet conditions, while sorting only changes the order of the displayed data.

Question 2

What does a wildcard do in a text criterion?

It stands for one or more unknown characters, allowing a search for a pattern rather than an exact full value.

Question 3

How is a calculated query field useful?

It can compute a value such as total marks or balance from existing numeric fields without manually entering a duplicate result.

Revision checklist

Aligned to the CBSE 2026–27 syllabus outline. Check the official subject curriculum and your school’s textbook/material for the prescribed scope.