IBM DB2 is a relational database management system for enterprise-wide solutions developed by IBM. A relational database is a database in which all of the data is logically contained in tables. These databases are organized according to the relational model. In a relational database like IBM DB2, referential integrity ensures data integrity by enforcing rules with referential constraints, check constraints, and triggers.

Google Sheets are a web-based application that allows users to create, modify and share spreadsheets online. With Google Sheets users can access and edit their spreadsheets from tablets, phones or computers wherever they go even when there’s no internet connection, changes will be synchronized when users go online again. Google Sheets are part of a free, web-based software office suite offered by the Google Drive service.