Transactions

Summary

A way to group multiple database operations so they all succeed together or all fail together — critical for operations like transferring money between two accounts.

How to Learn This

1Wrap a multi-step operation (e.g. debit one account, credit another) in a transaction.
2Deliberately trigger a failure mid-transaction and confirm the rollback works.
3Learn `BEGIN`, `COMMIT` and `ROLLBACK` at the SQL level.

Normalization

ACID Properties

More topics in SQL Databases

Relational Database Concepts SQL Basics (SELECT, INSERT, UPDATE, DELETE)Joins Indexes Normalization ACID Properties PostgreSQL MySQL Constraints & Keys Views Stored Procedures Database Design & ER Diagrams Migrations

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