In the previous sections, we explained what the Data Source View (DSV) is and how to create DSV. However, sometimes, there is a requirement to change the DSV. For example, you might want to add a calculated column in the DSV with SQL commands and functions, you might want to create a relationship between two views, or you might need to write a query and create a DSV table based on that query. All of these modifications can be done in the DSV, and in this section, we will go through some of them.