Four problems that appear the second a second user shows up.
Databases Without the Jargon
Where the facts live, and what happens when two people change them at once.
A database is the part of your app that is genuinely hard to undo. This course covers what it is for, why queries get slow, and why changing the shape of your data is a scarier operation than changing your code.
Start the first lesson0/5 lessons read
By the end you can
- Explain why a database beats a pile of files
- Predict which queries will get slow as data grows
- Treat schema changes with the caution they deserve
- Choose between relational and document stores for real reasons
Lessons
The relational model in plain language, including the join everyone pretends to understand.
Indexes explained properly, plus the query pattern that quietly destroys apps.
Code can be rolled back in seconds. Data cannot. Here is how people handle that.
The tribal argument, minus the tribe. What actually differs and when it matters to you.