The guides
One row at a time
Each guide answers one question people actually type: how long SQL takes, whether a particular certificate is worth its monthly rate, what separates a certificate from a certification, and which free route covers the same ground. Prices carry the day they were read off the seller’s own page. No salary figures, no completion rates, no job-placement claims — nobody publishes reliable ones for these products.
Every guide
AI Certifications: Which Ones Are Real
Most things sold as AI certifications are completion certificates. One clear counter-example publishes an accreditation claim — and not much else.
Read →09Sep 24, 2026DataCamp Review: Good Drills, Confusing Prices
Three of DataCamp's own pages quoted the same plan three different ways on the day we read them. Here is what the product is, and what it actually costs.
Read →08Sep 24, 2026DataCamp vs Coursera: Drills or a Syllabus
They are not really competitors. One sells repetition, the other sells a sequence with a certificate at the end — and the right answer depends on which you are missing.
Read →07Sep 24, 2026Free AI and Data Courses That Are Actually Free
Four sources cover spreadsheets, SQL, Python and machine learning for nothing, and none of them pays this site a penny. Here is what each one covers.
Read →06Sep 24, 2026How Long It Really Takes to Learn SQL
Nobody publishes a credible figure, so this page uses the only hours anybody states on the record — and explains why “learn SQL in a weekend” is a marketing line.
Read →05Sep 24, 2026How to Learn SQL, Starting From the Free Route
SQL is the cheapest valuable skill in data work to acquire, because the best beginner resources cost nothing. Here is the order that works.
Read →04Sep 24, 2026IBM Data Science Certificate: Twelve Courses, $196
More technical than the Google certificate, faster by its own stated pace, and carrying a credit recommendation that needs reading precisely.
Read →03Sep 24, 2026Is the Google Data Analytics Certificate Worth It?
Written without a single salary figure, because no credible source publishes one. What it contains, what it costs at Google's own stated pace, and who it fits.
Read →02Sep 24, 2026Machine Learning Courses Online, Compared Honestly
Three courses and two months at ten hours a week is what the best-known specialization states. Here is what that buys, and what the free route covers.
Read →01Sep 24, 2026Online Excel Courses: Start With Microsoft's Own
Excel is the one data skill where the free official documentation beats most paid courses. When paying is still worth it, and what it costs.
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