Your reports are wrong because a month is missing from a table, or the business still runs on an old Firebird or Access database nobody wants to touch. I fix the data or move it to PostgreSQL without putting the live database at risk. First I work on a copy: I load it, compare row counts and checksums for every table and send you that check. Nothing on the live database changes until you have seen it. You get a script you can re-run and a short note for your developer. I need a database user limited to the tables involved; it does not need admin rights. Paid in stages. Monthly support from $80.

You pay for each stage only after you have checked it, two rounds of changes per stage are included, and I fix my own mistakes free for 30 days after delivery.