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 Chapter 1: Introduction to Databases
 
 # What is a database?
+
+# DBMS
+
+* protect
+* define and control
+* backups
+* maintain data. enter, change and delete data
+* retrieve
+* Programming and GUI interface
+
+Example:
+
+customers
+* id
+* name
+* address
+
+products
+* id
+* description
+* product_finish
+
+orders
+* id
+* created_at
+
+line_items
+
+* id
+* order_id
+* product_id
+* quantity