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PART 6 · DATA
PART 6
DATA
6 classes. Each class holds its own standalone lessons.
PART 6 CLASSES
CLASSES, THEN LESSONS.
CLASS 18The API Economy: Give AI Access to the Real World
The ByeBuy Data Directory: A Map of the Public Data Universe
Use ByeBuy to discover thousands of sources and choose the right path into a product.
READ LESSON →September 12, 2026 · CLASS 18A Model Knows Patterns. Your Product Needs Facts.
Why useful AI products need live, private, and well-chosen data.
READ LESSON →September 12, 2026 · CLASS 18Static, Live, Private, and User Data Are Not the Same Thing
Choose the correct kind of data before designing the workflow.
READ LESSON →September 12, 2026 · CLASS 18From a Data Request to a Product Decision
Follow one request from a source through your product to a useful result.
READ LESSON →CLASS 19Where Do You Get Data?
A Dataset, a Provider, an API, and a Scraped Website Are Different Things
Learn which kind of source you are actually using before you build on it.
READ LESSON →September 12, 2026 · CLASS 19The Five Questions to Ask Before You Use a Data Source
Check coverage, freshness, access, rights, and cost before you commit.
READ LESSON →September 12, 2026 · CLASS 19Free Is a Price, Not a Data Strategy
Understand the limits and operating costs behind a supposedly free source.
READ LESSON →September 12, 2026 · CLASS 19Build Your First Data Source Map
Turn a product question into a documented, usable source plan.
READ LESSON →CLASS 20Databases for AI Builders
A Database Is the Part of Your App That Remembers
See why durable application memory belongs in a database.
READ LESSON →September 12, 2026 · CLASS 20Design Tables Around Real Questions, Not Around Screens
Design data around the decisions your product must make.
READ LESSON →September 12, 2026 · CLASS 20PostgreSQL, Supabase, and Neon: Learn the Database Before the Dashboard
Understand the database layer before choosing a friendly platform around it.
READ LESSON →CLASS 21SQL Without Becoming a Database Engineer
SQL Is How You Ask a Database a Precise Question
Use SQL as a way to ask exact questions of structured data.
READ LESSON →September 12, 2026 · CLASS 21Filter, Sort, Count, and Group: The Questions Products Ask Every Day
Learn the core data operations behind useful dashboards and product features.
READ LESSON →September 12, 2026 · CLASS 21Joins: How Separate Tables Become One Useful Answer
Connect related records without losing the meaning of either table.
READ LESSON →September 12, 2026 · CLASS 21Let AI Draft SQL, But You Own the Question and the Safety Check
Use an AI assistant for SQL while keeping review and safety in your hands.
READ LESSON →CLASS 22Embeddings and Vector Search
Search by Meaning, Not Only by Exact Words
Understand semantic search and when it helps people find the right information.
READ LESSON →September 12, 2026 · CLASS 22Chunks, Metadata, and Retrieval: The Pieces a Search System Actually Uses
See how a knowledge base is prepared so an AI can retrieve useful context.
READ LESSON →September 12, 2026 · CLASS 22Vector Search in Postgres: Useful When You Already Have Product Data
Add semantic retrieval to product data without inventing a separate mystery system.
READ LESSON →CLASS 23RAG: Giving AI Access to Your Own Knowledge
RAG Is a Workflow, Not a Magic Memory Button
Learn the retrieval workflow that gives AI access to trusted knowledge.
READ LESSON →September 12, 2026 · CLASS 23Build a Small RAG System You Can Inspect
Build a retrieval system whose documents, context, and answers you can actually inspect.
READ LESSON →September 12, 2026 · CLASS 23Grounded Answers Need Evidence, Evaluation, and a Refresh Plan
Keep a knowledge system trustworthy as its sources and answers change.
READ LESSON →