diff --git a/src/main/java/de/rwu/easydrop/core/OfferReviewer.java b/src/main/java/de/rwu/easydrop/core/OfferReviewer.java
index fb5f962..5b698bf 100644
--- a/src/main/java/de/rwu/easydrop/core/OfferReviewer.java
+++ b/src/main/java/de/rwu/easydrop/core/OfferReviewer.java
@@ -11,19 +11,20 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
+import java.util.Date;
 
 public class OfferReviewer {
 
     /**
-     *  OfferReviewer.
+     *  Check all Offers and compare them with the API.
      * @return list of all items that need to be changed
      */
-    public List<Offer> checkOffers(/*OfferReader/retriever for database? */) {
+    public List<Offer> checkOffer(/*OfferReader/retriever for database? */) {
 
         Connection connection = null;
         Statement statement = null;
         ResultSet resultSet = null;
-        List<Product> changedProducts = new ArrayList<>();
+        List<Offer> changedOffers = new ArrayList<>();
 
          try {
             // Establish the database connection
@@ -33,28 +34,27 @@ public class OfferReviewer {
             statement = connection.createStatement();
 
             // Execute the query to retrieve the entries
-            String query = "SELECT dataOrigin, productId, currentPrice FROM table";
+            String query = "SELECT sourceProduct, saleProduct, creationDate, upDate, "
+            + "checkDate, offerId FROM table";
             resultSet = statement.executeQuery(query);
 
             // Process the retrieved entries
             while (resultSet.next()) {
-                String webshop = resultSet.getString("webshop");
-                String dataOrigin = resultSet.getString("data_origin");
-                String productId = resultSet.getString("productId");
-                double currentPrice = resultSet.getDouble("currentPrice");
-                String merchant = resultSet.getString("merchant");
-                double deliveryPrice = resultSet.getDouble("delivery_price");
-                boolean available = resultSet.getBoolean("available");
+                Product sourceProduct = (Product) resultSet.getObject("sourceProduct");
+                Product saleProduct = (Product) resultSet.getObject("saleProduct");
+                java.sql.Date creationDate = resultSet.getDate("creationDate");
+                Date updateDate = resultSet.getDate("upDate");
+                Date checkDate = resultSet.getDate("checkDate");
+                String offerId = resultSet.getString("offerId");
 
                 // Call the API to get the current price
-                double apiPrice = getPriceFromAPI(productId);
+                double apiPrice = getPriceFromAPI(sourceProduct);
 
                 // Compare the prices
-                if (currentPrice != apiPrice) {
-                    // Price has changed, create a Product object and add it to the changedProducts list
-                    Product product = new Product(webshop, dataOrigin, productId, currentPrice,
-                    merchant, deliveryPrice, available);
-                    changedProducts.add(product);
+                if (saleProduct.getCurrentPrice() != apiPrice) {
+                // Price has changed, create a Product object and add it to the changedProducts list
+                    Offer offer = new Offer();
+                    changedOffers.add(offer);
                 }
             }
         } catch (SQLException e) {