SELECT TransactionID, TransactionDate, Amount, RegionCode FROM dbo.Fact_Transactions WHERE TransactionDate >= DATEADD(DAY, -1, GETDATE()) She right‑clicked . The preview window opened— zero rows . That was odd. The OLTP database was humming with activity; the finance team swore they’d entered dozens of new transactions the previous evening.
She traced the source of RegionCode . It was a foreign key to a lookup table, Dim_Region , populated nightly by another SSIS package called RegionSync . Emma opened that package’s logs. ssis-308
Chapter 1 – The Morning Alarm Emma Patel’s alarm chimed at 6:00 a.m., and she hit the snooze button with the reflex of a seasoned night‑owl. By 7:15 a.m. she was already at her standing desk, coffee in one hand and her laptop humming under the other. Today was the day the finance team would finally get their quarterly “Revenue‑by‑Region” report—automatically refreshed every night by the company’s flagship SSIS package, RevenueRollup . The OLTP database was humming with activity; the
