Founding rate: RM5 off Basic, forever — applied automatically. See pricing
Your manager just handed you a CSV export and five minutes before the 9am standup. This is the boring, unglamorous first hour of every real analyst job — count the rows, find the date range, find what's missing, find what's duplicated — and it's the one thing every SQL course skips by opening straight at window functions. Five steps, one small messy table, in order.
Before anything else: how many transaction rows are in this export? Return a single n.
Company names are trademarks of their respective owners, used here only to describe practice material. mahir_data is not affiliated with, endorsed by, or sponsored by any company named on this site. Terms.