Tables & field types — Field types at a glance (2)

• Rollup — aggregates values from records in another table that link back to this one. • Formula — computes a value from an expression over this record's own fields — see Formula fields. • Percent — a 0–100 value, drawn with a small progress bar in the grid. • Rating — a star rating out of five. • Progress — a number for tracking completion, shown as a plain value. • People — an owner or assignee, entered as a name. • Doc — a whole document on every record, written on its own page — see Docs. Which group a field is in decides everything else about it: whether you can edit it, whether an import can write it, and whether it can ever be wrong.