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Structured Query a Language (SQL) — Revision Notes

Mizoram Board · Class 12 · Computer Science

Structured Query a Language (SQL) revision notes for Mizoram Board Class 12 Computer Science: 4 topics in quick points.

50 questions96 flashcards5 concepts

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A diagram illustrating how SQL interacts with various Relational Database Management Systems (RDBMS) like MySQL, Oracle, PostgreSQL, and SQL Server, showing SQL as the common language for data access
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Key Topics to Revise

1

1. SQL Basics and Data Types

  • SQL is used to access and manipulate data in a database.
  • It can define the structure of data, manipulate data, declare constraints, and retrieve data.
  • A database is a collection of related tables.
2

2. Constraints and Keys

  • NOT NULL means a column cannot store NULL values.
  • UNIQUE means all values in a column must be different.
  • DEFAULT gives a value when no value is supplied.
3

3. DDL and Table Structure Commands

  • CREATE, ALTER, and DROP are Data Definition Language statements.
  • CREATE DATABASE makes a database.
  • CREATE TABLE makes a table with columns, data types, and constraints.
4

4. DML: INSERT, UPDATE, DELETE

  • INSERT, SELECT, UPDATE, and DELETE are Data Manipulation Language statements.
  • INSERT adds new rows into a table.
  • Values for text and date fields are written in single quotes.

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Full Notes

Key Concepts

SQL is the most popular queryCommon MySQL data types include CHARImportant constraints include NOT NULLCREATEINSERT

Frequently Asked Questions

What are the important topics in Structured Query a Language (SQL) for Mizoram Board Class 12 Computer Science?
Key topics in Structured Query a Language (SQL) include SQL Basics and Data Types, Constraints and Keys, DDL and Table Structure Commands, DML: INSERT, UPDATE, DELETE. Study these first, then practise questions on each for the Mizoram Board Class 12 board exam.
How should I revise Structured Query a Language (SQL) for the Mizoram Board Class 12 board exam?
Learn the core ideas first, then work through the 50 practice questions on Structured Query a Language (SQL). Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All Mizoram Board Class 12 Computer Science Revision Notes

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