Step-by-step guides for SQL, tools, and practical AI — skills you can use at work. Learn by doing, not by jargon.
🎓 Core Analytics & Data Skills
The foundational curriculum: go from messy spreadsheets to confident SQL, Python, charts, and metrics you reuse everywhere.
SQL series
Step-by-step SQL — from playground setup through joins, subqueries, and optimization.
- Parts 1–4: Playground setup, SELECT, filtering, and sorting
- Parts 5–8: Grouping, aggregates, multi-table joins & subqueries
- Parts 9–14: Views, indexes, window functions, CTEs & query tuning
🤖 Everyday AI for Work & Life
Practical AI workflows for knowledge workers — prompting, memory, personal assistants, and real work tasks.
Practical AI for analytics people
A nine-part series for analysts: what AI can and cannot do, tokens, prompts, evals, RAG, agents, privacy, documentation, and a personal ops checklist.
- Parts 1–3: Capabilities, limits, token economics & prompt framing
- Parts 4–6: RAG foundations, agents, evals & structured data extraction
- Parts 7–9: Privacy boundaries, governance checklists & production ops
🛠️ Major AI Platform Masterclasses
Deep-dive operational playbooks for frontier models and developer ecosystems with official marks.
Claude
Anthropic Claude from first login through product map, Claude Code, and Cowork — one continuous path.
- Parts 1–3: Prompt caching, Projects, Artifacts & context hygiene
- Parts 4–6: Claude Code CLI tool execution, subagents & workflows
- Parts 7–10: MCP server integration, tool boundaries & developer best practices
🧠 Open-Source & AI Engineering
Run, build, fine-tune, and inspect models locally — llama.cpp, Unsloth, RAG, vector databases, and autonomous harnesses.
Fine-tuning open models with Unsloth from scratch
A comprehensive, zero-fluff engineering guide to fine-tuning open foundation models using Unsloth. Understand the mechanics of weight updates versus prompt engineering and RAG, master manual CUDA autograd kernels that deliver 5x training speedups with 80% lower VRAM, explore LoRA and QLoRA low-rank adapter mathematics, prepare high-quality Alpaca and ShareGPT instruction datasets, fine-tune Llama 3 and Qwen models on free Google Colab GPUs, and export merged adapters directly to GGUF, Ollama, and vLLM for high-throughput production serving.
- Part 1: Weight updates vs RAG & prompt engineering trade-offs
- Part 2: 5x faster custom CUDA autograd kernels with 80% less VRAM
- Part 3: LoRA / QLoRA training on Colab GPUs & GGUF production export
🏢 Data Systems, Engineering & Applied Practice
How data moves, scales, and delivers value: pipelines, dbt, Airflow, stewardship, BI, and domain analytics.
How data actually moves
A seven-part series for analysts who inherit pipelines: path, latency, storage homes, orchestration, dbt concepts, environments, and observability.
- Parts 1–2: Trace data movement, lineage & latency requirements
- Parts 3–5: Storage tiers, orchestration engines & dbt transformations
- Parts 6–7: Multi-environment deployments & proactive observability alerts
Common analytics traps
Survivorship, cherry-picking, averages of averages, wrong grain, and lonely numbers. Spot the traps that make clean charts support bad decisions.
What Claude is (plain English)
Claude is Anthropic’s AI assistant family, not one single app. This Part 1 map separates company, models, and products so you can start on web or mobile without…
How to write a one-page analytics brief
Stop starting with the warehouse. Use an eight-field one-page analytics brief to turn vague stakeholder asks into decision-ready work before you write a single query.
Reading a number like an adult
Counts, rates, denominators, and “compared to what?” A practical guide to reading workplace numbers without falling for lonely metrics or seasonal surprises.
Good enough vs perfect data
Perfect data never arrives. Learn when an approximate answer is decision-ready, how to talk about confidence without fake precision, and a short quality checklist you can use before…
The Analytics Loop
Analytics is not a one-way chart. Learn the six-step loop from question to measure-again, with a worked example, SQL sketch, and a ticket checklist you can reuse.
Data vs Information vs Insight
Data, information, and insight are not the same thing. Learn the difference with plain definitions, a workplace ladder, and examples you can use in your next meeting.
What Problem Are We Actually Solving?
Stop opening dashboards until you know which decision will change. A practical guide to framing analytics problems for everyday work; questions before data.
How to Check AI-Written SQL Before You Ship It
Chatbots can draft queries in seconds. Here’s a simple checklist so you catch bad joins, wrong filters, and confident nonsense.
SQL Tutorial 13: Strategies for Maintenance and Optimization
Keep databases healthy over time with backups you can restore, slow query awareness, stats and vacuum concepts, access grants, and on-call hygiene. Close the SQL series with a…
SQL Tutorial 12: Best Practices and Optimization
Write cleaner and faster SQL with an EXPLAIN mindset, tight select lists, sargable filters, and index awareness on real customer and order patterns. Learn practical optimization habits without…
SQL Tutorial 11: Stored Procedures, Triggers, and User-Defined Functions
Understand stored procedures, triggers, and user-defined functions as database objects you may inherit at work. Learn when analysts should care, when SQL scripts or dbt-style models fit better,…











