Ensure Unique Emails with a Unique B-tree Index

Unique B-tree Index on email in Users

Write a PostgreSQL query to create a unique B-tree index on the "email" column in the Users table.

Solution:

-- Create a unique B-tree index on the "email" column.
CREATE UNIQUE INDEX idx_users_email_unique ON Users USING btree (email);

Explanation:

• Purpose of the Query:
• To enforce the uniqueness of email addresses while improving search performance.
• Demonstrates the creation of a unique index using the B-tree method.
• Key Components:
• CREATE UNIQUE INDEX : Ensures that no duplicate values exist in the "email" column.
• USING btree (email) : Specifies the index type and the column to be indexed.
• Real-World Application:
• Prevents duplicate user registrations and speeds up queries that look up users by email.

Notes:

• Unique B-tree indexes maintain data integrity and improve query performance simultaneously.
• They are a standard practice in user authentication systems.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to create a unique B-tree index on the "email" column in the "Users" table.
• Write a PostgreSQL query to create a unique B-tree index on the "social_security_number" column in the "Citizens" table.
• Write a PostgreSQL query to create a unique B-tree index on the "username" column in the "Accounts" table.
• Write a PostgreSQL query to create a unique B-tree index on the "registration_id" column in the "Registrations" table.

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