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Summary - Security and backup

Build a secure setup with GRANT and prepared statements.

Summary - Security and backup

Security and backup: PREPARE against SQL injection, GRANT/REVOKE for privileges, COPY TO for backup, COPY FROM for recovery. Least privilege and regular backups are core principles.

-- PREPARE -> GRANT -> COPY TO -> COPY FROM
-- en az yetki, düzenli yedek

Security and backup go hand in hand.

Practice Summary - Security and backup

Summary task: give the reader role read access on orders.

Starter code

query.sql
-- summary security
GRANT

Sample solution

query.sql
GRANT SELECT ON orders TO reader;

Expected output

GRANT

Questions and answers

Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.

1 Read permission

Question 
GRANT SELECT ON orders TO ____
Answer 
GRANT SELECT ON orders TO reader

Explanation: Read access is granted with GRANT SELECT; the reader role can only run SELECT.

2 What is used against SQL injection?

  • INDEX
  • TRIGGER
  • PREPARE Correct answer
  • VIEW

Explanation: PREPARE is used against SQL injection.

3 Summary - Security and backup: match the terms

Term Meaning
PREPARE prepare
GRANT grant
COPY TO backup
PITR point-in-time

All lessons in Expert

1 Database design

  1. ER model
  2. Cardinality
  3. Surrogate keys
  4. Natural keys
  5. Denormalization
  6. Summary - Design

2 Index tuning

  1. B-tree structure
  2. Covering index
  3. Partial index
  4. Index selectivity
  5. Index maintenance
  6. Summary - Index tuning

3 Query optimizer

  1. What is an optimizer?
  2. Statistics
  3. Cost model
  4. Join strategies
  5. Plan cache
  6. Summary - Optimizer

4 Project: Performance tuning

  1. Scenario design
  2. Reading plans
  3. Adding indexes
  4. Rewriting queries
  5. Comparing results

5 Replication and sharding

  1. What is replication?
  2. Master-slave
  3. Sync vs async
  4. What is sharding?
  5. Shard key
  6. Summary - Replication and sharding

6 Distributed and big data

  1. Distributed queries
  2. MPP
  3. Columnar storage
  4. SQL on Hadoop
  5. SQL vs NoSQL
  6. Summary - Distributed and big data

7 Security and backup

  1. SQL injection
  2. Parameterised queries
  3. Authorisation
  4. Backup
  5. Recovery
  6. Summary - Security and backup

8 Expert final

  1. Design challenge
  2. Optimization challenge
  3. Security challenge
  4. Backup challenge