All Articles & Tutorials
Explore practical guides, step-by-step masterclasses, and foundational definitions across AI, SQL, and data systems — written in plain, human English.
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How to profile a messy data table before you clean it
Cleaning before you look is how silent bias sneaks into dashboards. Learn a lightweight profile of counts, nulls, ranges, and weird categories with SQL and Python so every…
How to check the results of a long, multi-step ChatGPT Work job
Part 3 of the ChatGPT Work tutorial. Run multi-step jobs as a goal-plan-act-checkpoint loop: review the plan, steer mid-run, check usage, and finish with a result checklist that…
How to write a CLAUDE.md or AGENTS.md file so Claude Code follows your rules
Part 6 of the Claude Code tutorial. How CLAUDE.md, AGENTS.md, README, and related instruction files split work between humans and agents, with a sample CLAUDE.md skeleton and the…
What does bad data mean? How to name the problem so you can fix it
Bad data is a shrug, not a diagnosis. Learn five practical quality dimensions (completeness, accuracy, consistency, timeliness, uniqueness) with workplace examples so you name the failure mode before…
How to give ChatGPT Work its first task and approve each step
Part 2 walks one low-risk agentic task with approvals: owned notes into a short status deck, tight tool access, and human review before anything leaves your desk. First…
