R-FOR-DATA5 MIN READ
When a join inflates your rows, stop and diagnose
Choose the right response to an unexpected row-count increase after a join.
Omar joins 12,400 invoices to a customer table and gets 14,982 rows. The dashboard deadline is noon. The tempting move is distinct(), because the chart “looks fine.”
Read the full lesson
Sign up free — one personalized lesson every day, matched to your role and goals.
Already have an account? Sign in