diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/inspectionProfiles/profiles_settings.xml b/.idea/inspectionProfiles/profiles_settings.xml
new file mode 100644
index 0000000..105ce2d
--- /dev/null
+++ b/.idea/inspectionProfiles/profiles_settings.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..1d3ce46
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Black">
+    <option name="sdkName" value="Python 3.13" />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.13" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..2389036
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/rda_task_4_database_normalization.iml" filepath="$PROJECT_DIR$/.idea/rda_task_4_database_normalization.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/rda_task_4_database_normalization.iml b/.idea/rda_task_4_database_normalization.iml
new file mode 100644
index 0000000..d8b3f6c
--- /dev/null
+++ b/.idea/rda_task_4_database_normalization.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="jdk" jdkName="Python 3.13" jdkType="Python SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/task.sql b/task.sql
index cc65344..d151625 100644
--- a/task.sql
+++ b/task.sql
@@ -9,25 +9,35 @@ CREATE TABLE Countries (
     PRIMARY KEY (ID)
 );
 
+CREATE TABLE Warehouses (
+    ID INT,
+    Amount INT,
+    Name VARCHAR(50),
+    Address VARCHAR(50),
+    PRIMARY KEY (ID)
+);
+
 CREATE TABLE ProductInventory (
     ID INT,
     ProductName VARCHAR(50),
-    WarehouseAmount INT,
-    WarehouseName VARCHAR(50),
-    WarehouseAddress VARCHAR(50), 
+    WarehouseID INT,
     CountryID INT,
 	FOREIGN KEY (CountryID) REFERENCES Countries(ID) ON DELETE NO ACTION,
+    FOREIGN KEY (WarehouseID) REFERENCES Warehouses(ID) ON DELETE NO ACTION,
     PRIMARY KEY (ID)
 );
 
--- Populate test data
 
 INSERT INTO Countries (ID,Name)
 	VALUES (1, 'Country1');
 INSERT INTO Countries (ID,Name)
 	VALUES (2, 'Country2');
+INSERT INTO Warehouses (ID, Amount, Name, Address)
+    VALUES (1, 2, 'Warehouse-1', 'City-1, Street-1'),
+           (2, 5, 'Warehouse-2', 'City-2, Street-2');
     
-INSERT INTO ProductInventory (ID,ProductName,WarehouseAmount,WarehouseName,WarehouseAddress,CountryID)
-	VALUES (1, 'AwersomeProduct', 2, 'Warehouse-1', 'City-1, Street-1',1);
-INSERT INTO ProductInventory (ID,ProductName,WarehouseAmount,WarehouseName,WarehouseAddress,CountryID)
-	VALUES (2, 'AwersomeProduct', 5, 'Warehouse-2', 'City-2, Street-2',2);
+INSERT INTO ProductInventory (ID,ProductName,WarehouseID,CountryID)
+	VALUES (1, 'AwersomeProduct', 1,1);
+INSERT INTO ProductInventory (ID,ProductName,WarehouseID,CountryID)
+	VALUES (2, 'AwersomeProduct', 2,2);
+