update,

ryankochun91735/task1/project/_doc_source/parking.md

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+
+
+tbl_warehouse_items {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+tbl_purchase_orders {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+tbl_deliveries {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+tbl_discounts {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+tbl_invoices {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+tbl_order_items {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+tbl_payments {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+tbl_returns {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+}
+
+
+---
+
+```mermaid
+erDiagram
+    CUSTOMER ||--o{ ORDER : places
+    CUSTOMER {
+        string name
+        string custNumber
+        string sector
+    }
+    ORDER ||--|{ LINE-ITEM : contains
+    ORDER {
+        int orderNumber
+        string deliveryAddress
+    }
+    LINE-ITEM {
+        int id
+        int quantity
+        string productCode
+
+        float pricePerUnit
+    }
+```
+