Spot-check a dataset

I have a dataset: {{description}}. I want to use it for {{intendedUse}}.

Give me the checks to run before I trust it — row counts against a known total,
duplicate keys, nulls in fields I am about to group by, dates outside plausible
range, and whatever else this shape of data usually gets wrong.

For each check, say what a bad result looks like and whether it kills the analysis
or just needs a caveat.

What to fill in

{{description}}

What the dataset is — e.g. one row per subscription event, from Stripe

{{intendedUse}}

What you'll use it for — e.g. monthly churn by plan