All Articles & Tutorials
Explore practical guides, step-by-step masterclasses, and foundational definitions across AI, SQL, and data systems — written in plain, human English.
All articles
How to remove duplicate customer records without losing their history
Duplicates are identity problems, not a delete button. Learn natural versus surrogate keys, soft deletes, merge lineage, and validation checks so you collapse false twins without shredding history,…
Should you use ChatGPT Work or regular Chat for your task?
Part 4 closes the ChatGPT Work tutorial. Use a decision table for when Work beats Chat, when Chat is enough, and which wrong doors to avoid. Then continue…
How to decide which plugins and connectors to add to Claude Code
Part 7 of Claude Code tutorial. Map built-in tools, MCP connectors, and plugins that bundle skills, subagents, hooks, and settings. Climb the ladder from a plain task to…
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…
