diff --git a/.idea/misc.xml b/.idea/misc.xml
index 532a8e6..3d92f21 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_22" default="true" project-jdk-name="22 (WSL) (2)" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_22" default="true" project-jdk-name="22 (WSL) (3)" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/diagram.png b/diagram.png
new file mode 100644
index 0000000..082b312
Binary files /dev/null and b/diagram.png differ
diff --git a/src/main/sql/main.sql b/src/main/sql/main.sql
index 2870897..268927c 100644
--- a/src/main/sql/main.sql
+++ b/src/main/sql/main.sql
@@ -5,7 +5,7 @@ USE nplo_db;
 -- Create Member table
 CREATE TABLE Member
 (
-    MemberID             INT PRIMARY KEY AUTO_INCREMENT,
+    MemberID             INT PRIMARY KEY AUTO_INCREMENT UNIQUE,
     FirstName            VARCHAR(50)                          NOT NULL,
     LastName             VARCHAR(50)                          NOT NULL,
     MiddleInitial        CHAR(1),
@@ -22,7 +22,7 @@ CREATE TABLE Member
 -- Create Donations table
 CREATE TABLE Donations
 (
-    DonationID     INT PRIMARY KEY AUTO_INCREMENT,
+    DonationID     INT PRIMARY KEY AUTO_INCREMENT UNIQUE,
     DonorID        INT,
     DonationDate   DATE                       NOT NULL,
     DonationType   ENUM ('Money', 'Products') NOT NULL,
@@ -33,7 +33,7 @@ CREATE TABLE Donations
 -- Create Products table
 CREATE TABLE Products
 (
-    ProductID    INT PRIMARY KEY AUTO_INCREMENT,
+    ProductID    INT PRIMARY KEY AUTO_INCREMENT UNIQUE,
     Description  TEXT,
     DonationDate DATE,
     SellingPrice DECIMAL(10, 2),
@@ -48,7 +48,7 @@ CREATE TABLE Products
 -- If DeliverToCity is NOT NULL, then this sale needs to be delivered
 CREATE TABLE Sales
 (
-    SaleID        INT PRIMARY KEY AUTO_INCREMENT,
+    SaleID        INT PRIMARY KEY AUTO_INCREMENT UNIQUE,
     SaleDate      DATE NOT NULL,
     TotalAmount   DECIMAL(10, 2) DEFAULT 0,
     ClientID      INT,
@@ -71,7 +71,7 @@ CREATE TABLE SalesItems
 -- Create Employees table
 CREATE TABLE Employees
 (
-    EmployeeID INT PRIMARY KEY,
+    EmployeeID INT PRIMARY KEY UNIQUE,
     JobTitle   ENUM ('President', 'Vice-President', 'Cashier', 'Other') NOT NULL,
     Salary     DECIMAL(10, 2),
     FOREIGN KEY (EmployeeID) REFERENCES Member (MemberID)
@@ -80,7 +80,7 @@ CREATE TABLE Employees
 -- Create Expenses table
 CREATE TABLE Expenses
 (
-    ExpenseID    INT PRIMARY KEY AUTO_INCREMENT,
+    ExpenseID    INT PRIMARY KEY AUTO_INCREMENT UNIQUE,
     ApprovedByID INT,
     PaymentDate  DATE                                             NOT NULL,
     Amount       DECIMAL(10, 2)                                   NOT NULL,
@@ -387,6 +387,5 @@ WHERE m.MemberType = 'Client'
                          FROM Sales
                          WHERE SaleDate >= '2024-01-01')
 GROUP BY m.MemberID
-HAVING
-    COUNT(s.SaleID) > 0
+HAVING COUNT(s.SaleID) > 0
 ORDER BY TotalSalesAmount DESC;
\ No newline at end of file