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Learning Journal Week 4

 

Learning Journal Week 4

This week is half way through the course. 

Briefly summarize 5 things what you have learned in the course so far.  

List at least 3 questions you still have about databases.

  1. Database Normalization
    I’ve learned how to structure databases efficiently using normalization techniques to reduce redundancy and improve data integrity.

  2. Writing SQL Queries
    I can now write a variety of SQL queries sing statements like SELECT, JOIN, GROUP BY, and more.

  3. Understanding ER Diagrams
    I can design Entity-Relationship diagrams and use them to model  relationships.

  4. Data Integrity with Constraints
    I’ve learned how to use rules in the database using constraints like PRIMARY KEY, FOREIGN KEY, UNIQUE, and NOT NULL.

  5. Views and Indexes
    I can use views to simplify data access.

Questions
How do databases make sure data stays safe and consistent if an error corrupts the data?

What are the differences between SQL and other database languages, and when would you use one over the other?

How do databases keep personal or sensitive information secure?

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