updated README

README.md

@@ -1 +1,162 @@
 # Readme File
+
+> ## Datenbank Design
+> ![user](assets/images/DB_Design_user.png)
+> ![products](assets/images/DB_Design_products.png)
+
+```sql
+Table categories {
+  categoryID int [pk]
+  name varchar(255)
+  parentCategoryID int
+}
+
+Ref: "categories"."parentCategoryID" < "categories"."categoryID"
+
+Table brands {
+  brandID int [pk]
+  name varchar(255)
+}
+
+Table products {
+  productID int [pk]
+  categoryID int
+  brandID int
+  model varchar(255)
+  ean varchar(20)
+  description text
+}
+
+Ref: "products"."categoryID" < "categories"."categoryID"
+Ref: "products"."brandID" < "brands"."brandID"
+
+Table shops {
+  shopID int [pk]
+  name varchar(255)
+  website varchar(255)
+}
+
+Table offers {
+  offerID int [pk]
+  productID int
+  shopID int
+  price decimal(10,2)
+  shippingCost decimal(10,2)
+  inStock boolean
+  productURL varchar(500)
+  lastUpdated timestamp
+}
+
+Ref: "offers"."productID" < "products"."productID"
+Ref: "offers"."shopID" < "shops"."shopID"
+
+Table attributes {
+  attributeID int [pk]
+  name varchar(255)
+  unit varchar(50)
+  dataType varchar(20) 
+}
+
+Table categoryAttributes {
+  categoryID int
+  attributeID int
+}
+
+Ref: "categoryAttributes"."categoryID" < "categories"."categoryID"
+Ref: "categoryAttributes"."attributeID" < "attributes"."attributeID"
+
+Table productAttributes {
+  productID int
+  attributeID int
+  valueString varchar(255)
+  valueNumber decimal(10,2)
+  valueBool boolean
+}
+
+Ref: "productAttributes"."productID" < "products"."productID"
+Ref: "productAttributes"."attributeID" < "attributes"."attributeID"
+
+
+
+
+
+
+
+
+
+
+
+Table users {
+  userID int [pk]
+  email varchar(255)
+  passwordHash varchar(255)
+  displayName varchar(255)
+  isActive boolean
+  createdAt timestamp
+}
+
+Table roles {
+  roleID int [pk]
+  name varchar(50)
+}
+
+Table userRoles {
+  userID int
+  roleID int
+}
+
+Ref: "userRoles"."userID" < "users"."userID"
+Ref: "userRoles"."roleID" < "roles"."roleID"
+
+Table userFavorites {
+  userID int
+  productID int
+  createdAt timestamp
+}
+
+Ref: "userFavorites"."userID" < "users"."userID"
+Ref: "userFavorites"."productID" < "products"."productID"
+
+Table priceAlerts {
+  alertID int [pk]
+  userID int
+  productID int
+  targetPrice decimal(10,2)
+  isActive boolean
+  createdAt timestamp
+}
+
+Ref: "priceAlerts"."userID" < "users"."userID"
+Ref: "priceAlerts"."productID" < "products"."productID"
+
+Table notifications {
+  notificationID int [pk]
+  userID int
+  title varchar(255)
+  message text
+  isRead boolean
+  createdAt timestamp
+}
+
+Ref: "notifications"."userID" < "users"."userID"
+
+Table reviews {
+  reviewID int [pk]
+  userID int
+  productID int
+  rating int
+  comment text
+  createdAt timestamp
+}
+
+Ref: "reviews"."userID" < "users"."userID"
+Ref: "reviews"."productID" < "products"."productID"
+
+Table userSessions {
+  sessionID varchar(128) [pk]
+  userID int
+  expiresAt timestamp
+}
+
+Ref: "userSessions"."userID" < "users"."userID"
+```