Back dating invoices audit. That technique, though, was a bit too obvious. If you have a question please start a new post. Using SQL code or another programming language, identify all of the checks that are in one data base and not the other. Her excuse is that they have been having problems with internet not sending them out through the accounting software. Marc Ward. Where ln refers to the natural log base e. The ID field should be a unique chanelwestcoastnude identifier to distinguish one record from another. Invoice dates are considered similar if the difference between the dates is less than a designated amount such as 7 days.