Watch or read the walkthrough
75-second silent visual guide. Pause at any point; the same material is available in the text steps and downloadable transcript.
Read the contract
One row per order; currency is integer EUR cents. Include completed orders only.
Inspect the source
There are 8 unique orders. Two are cancelled; preserve them for reconciliation.
Calculate the result
April 30000 cents; May 40000 cents. Together 70000 completed cents.
Explain the change
EUR100 increase, or 33.3% relative toApril. Two tiny periods do not establish a cause.
Hand over evidence
Supply the query/script, source dictionary, control totals and a limitation.
Make the reasoning yours.
Try the activity before reading its reference. Keep your sources, commands and assumptions with your work. Companion activities are unsaved self-practice and do not award a certificate or change lesson progress.