https://github.com/billwallis/database-crud-example

A simple example of a CRUD implementation for a database layer.
https://github.com/billwallis/database-crud-example

crud python sql

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A simple example of a CRUD implementation for a database layer.

• Host: GitHub
• URL: https://github.com/billwallis/database-crud-example
• Owner: billwallis
• Created: 2025-01-19T11:40:33.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2025-10-08T05:55:13.000Z (9 months ago)
• Last Synced: 2025-12-28T04:25:47.347Z (6 months ago)
• Topics: crud, python, sql
• Language: Python
• Homepage:
• Size: 39.1 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Codeowners: .github/CODEOWNERS

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---

# Database CRUD Example

A simple example of a CRUD implementation for a database layer.

## Model

The model is loan system with accounts, customers, loans, and links between the accounts and customers ("account-customer bridges") since accounts can have multiple customers and customers can have multiple accounts.

```mermaid

---

title: Loan System

---

erDiagram

    accounts {

        int account_id

        timestamp created_ts

        timestamp updated_ts

        bool deleted

    }

    customers {

        int customer_id

        varchar forename

        varchar surname

        date date_of_birth

        varchar postcode

        timestamp created_ts

        timestamp updated_ts

        bool deleted

    }

    account_customer_bridge {

        int account_id

        int customer_id

        timestamp created_ts

        timestamp updated_ts

        bool deleted

    }

    loans {

        int loan_id

        int account_id

        decimal amount

        decimal interest_rate

        date start_date

        date end_date

        decimal current_balance

        timestamp created_ts

        timestamp updated_ts

        bool deleted

    }

    customers ||--|{ account_customer_bridge : ""

    accounts ||--|{ account_customer_bridge : ""

    accounts ||--o{ loans : "opens"

```