Bit of a weird request but necessity is the mother of invention and all that. Over the last few years, I have set up a central database (Hate the term Data Warehouse) that brings in data from 3 different systems into a standard format (We keep the software the sites have when we inherit them rather than standardise - don't ask!). The primary purpose of this database was to upload the data to a marketing system so we can email customers across all of our sites using a simple filter.
We also use a 4th system with the big issue that it is hosted software. There was a link between the marketing company and the software provider using an API so we were collecting the data without it going through my database. However, the two companies appear to have fallen out and that link has been switched off. I have now been tasked with getting the data...