Growth is reviewing last month's free trials. trial_signups (signup_id, plan, signed_up_at) records each sign-up; signed_up_at is a timestamp with the date and time (UTC).
Return every sign-up made in March 2024 — from the very start of 1 March to the very end of 31 March.
Columns: signup_id, plan, signed_up_at. Sort by signed_up_at.