As data specialist, I know this kind of work is very common, and I know how to deal with it quickly, with accuracy. I propose the fast solution based on python programming language, and its capacity to read data from excel and import them into ms access (or any other database, sqlserver, oracle, mysql, sqlite, etc). When it's done, I export them back to excel, then I compare the source and the target. If differences exist, I fix them manually. This process ensures me that there're no more data, no less, no alteration. With over 10 years of experience in IT, I have honed my skills in data entry, data processing, and managing databases. Your project perfectly aligns with these skills I bring to the table. Delving into the task at hand, I will harness the power of Python, a robust programming language known for its data handling capabilities, to read your Excel data and seamlessly import it into the database of your choice - whether it be MS Access, SQL Server, Oracle, MySQL or SQLite.
What sets me apart from the rest is my keen attention to detail and aptitude for accuracy. In a task as crucial as transferring data from Excel to a database, even the slightest errors can lead to significant complications. Therefore, I am committed to cross-checking every single data point between Excel sheets and the database manually. This ensures not only that the process is executed smoothly but also that there are no inadvertent alterations or missing data.