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- Welcome to module two of the Event Sourcing course. In this module, were gonna cover what event sourcing is. (bright music) Lets start with a simple example. Imagine we have an e-commerce application A user, well call her Sanjana, has added a few items to her shopping cart, a T-shirt, some pants, and a hat. The shopping cart is stored in a database table, and that table looks just like the shopping cart does The table has rows and columns stored in the database that exactly match the rows displayed on the screen when a user clicks their cart. Adding a new item adds a new row to the screen and a new row to the database table. If you add more than one item, the item count goes up on the screen and is saved to the database. This approach is known as CRUD, as you can create, read, update, or delete any row in the table you wish. You should find this very familiar, If youve used databases before. When we apply event sourcing, we achieve the same goal, storing the shopping cart safely