I am working on a project to analyze the tourism data. The raw data are delivered to me in the format of Microsoft Excel spreadsheet files. I open the files and find the data are messy. After I manage to combine 6 spreadsheet files into a single sheet using Microsoft Access, I decide to load the single sheet into an Oracle database as a table. All columns will be defined as varchar2 type initially. My plan is to clean up those varchar2 data type columns, such as average annual temperature, and convert them to numeric using rich set of Oracle string functions. I don't have the access to any Oracle instance and I decide to start one on Amazon's platform using RDS. It takes me about 2 minutes to fill in those necessary parameters and the database is starting.