diff --git a/src/core/database.cpp b/src/core/database.cpp
index 4a97e48..fc1a1c8 100644
--- a/src/core/database.cpp
+++ b/src/core/database.cpp
@@ -1,8 +1,8 @@
 #include "database.h"
 
-#include <filesystem>
 #include <iostream>
 #include <stdexcept>
+#include <vector>
 
 Database::Database(const std::string& dbname) : db_(nullptr)
 {
@@ -30,9 +30,12 @@ void Database::exec(const std::string& sql)
 
 void Database::createNew()
 {
+    std::vector<std::string> sqlStrings{};
+
     std::string sqlCreateKima2{"CREATE TABLE IF NOT EXISTS kima2 ("
                                "version INTEGER NOT NULL);"
                                "INSERT INTO kima2 (version) VALUES (1);"};
+    sqlStrings.push_back(sqlCreateKima2);
     std::string sqlCreateSellers{"CREATE TABLE IF NOT EXISTS sellers ("
                                  "id TEXT PRIMARY KEY NOT NULL, "
                                  "seller_no INTEGER, "
@@ -41,7 +44,7 @@ void Database::createNew()
                                  "offered_articles INTEGER, "
                                  "UNIQUE (seller_no)"
                                  ");"};
-
+    sqlStrings.push_back(sqlCreateSellers);
     std::string sqlCreateArticles{
         "CREATE TABLE IF NOT EXISTS articles ("
         "id TEXT PRIMARY KEY NOT NULL, "
@@ -54,11 +57,26 @@ void Database::createNew()
         "FOREIGN KEY (seller_id) REFERENCES sellers(id) ON DELETE CASCADE, "
         "CHECK (article_no BETWEEN 0 AND 99999)"
         ");"};
+    sqlStrings.push_back(sqlCreateArticles);
+    std::string sqlCreateSales{"CREATE TABLE IF NOT EXISTS sales ("
+                               " id TEXT PRIMARY KEY NOT NULL,"
+                               " source_no INTEGER NOT NULL,"
+                               " sold_at TEXT"
+                               ");"};
+    sqlStrings.push_back(sqlCreateSales);
+    std::string sqlCreateSalesItems{
+        "CREATE TABLE IF NOT EXISTS sales_items("
+        " sale_id TEXT NOT NULL,"
+        " article_id TEXT NOT NULL,"
+        " FOREIGN KEY (sale_id) REFERENCES sales(id) ON DELETE CASCADE,"
+        " FOREIGN KEY (article_id) REFERENCES articles(id) ON DELETE CASCADE"
+        ");"};
+    sqlStrings.push_back(sqlCreateSalesItems);
 
     beginTransaction();
-    exec(sqlCreateKima2);
-    exec(sqlCreateSellers);
-    exec(sqlCreateArticles);
+    for (const auto& sql : sqlStrings) {
+        exec(sql);
+    }
     endTransaction();
 }