Filtering with WHERE

Comparison operators, boolean logic, IN, BETWEEN, LIKE, and the operator precedence traps that quietly return the wrong rows.

foundational~1.5hWe mark it against a checklist you can read first

The barWhat counts as knowing this

Filter rows with combined AND/OR conditions and get the precedence right

That sentence is the bar. It only counts once your work shows you can do it. Reading about it does not.

Prove itA check for this one skill

Up to 3 questions on this skill alone, marked against the bar beside this. It stops as soon as the answer is clear. No account, and your answers are not kept.

01 · Prerequisites

You'll need these first

SELECT and projection

03 · What comes next

What it unlocks

Start on SQL & Data Analysis

Every skill above, ordered by what depends on what, with the projects above that as the evidence you actually did it. We work out where you already are first, so the path skips what you can do.

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Part of SQL & Data Analysis.