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QR QUEST

Visit the given link
to learn about Constraints
in SQL:
https://www.youtube.com/watch?v=-
8bYtApJNos
Answer the given questions:

1. Why are constraints important
in a database?
2. Explain any two SQL
constraints.

USING DATABASE

To work with a specific database, you must first select it using the
USE command. The syntax is as follows:

USE database_name;

DELETING DATABASE

If you no longer need a database, you can delete it. However, this action is permanent and
removes all tables and data within the database. Always ensure that you have a backup before
deleting a database.

The syntax to delete a database is:

DROP DATABASE database_name;

CREATING AND MANAGING TABLES

In MySQL, tables are the fundamental building blocks of a database for storing data in an
organised mannner. Table management involves creating, viewing, modifying and deleting these
structures as needed.

CREATING TABLES
A table, also known as a relation, organizes data into rows and columns. To create one, you use
the CREATE TABLE command. The syntax is as follows:

CREATE TABLE table_name
(
column_name1 data_type(size),

column_name2 data_type(size),
column_name3 data_type(size),
.....

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