Business Problem
A library needs a structured way to manage books, members, borrowing transactions, returns, and inventory availability. Without a proper database, records can become inconsistent, manual tracking becomes time consuming, and reporting becomes difficult.
Solution
I designed a relational SQL database that organizes the main library operations into separate normalized tables. The system allows library staff to manage book records, track member activity, monitor borrowed and returned books, and generate reports using SQL queries.
Database Design
The database was designed using relational database principles. Each major business entity is stored in its own table, with relationships connecting books, members, and transaction records.
- Books are stored separately from borrowing records.
- Members are stored separately from transaction history.
- Borrowing and return activity are tracked through transaction tables.
- Primary keys identify unique records.
- Foreign keys connect related records across tables.
- Normalized table design reduces duplicate data.
SQL Features Demonstrated
- Database creation
- Table creation
- Primary keys and foreign keys
- Relational table design
- CRUD operations
- JOIN queries
- Filtering and searching records
- Inventory availability tracking
- Borrowing and return transaction logic
- Basic reporting queries
Sample SQL Workflow
The system follows a simple operational flow from member registration, book catalog setup, borrowing transaction, return processing, and reporting.
- Add new books into the catalog.
- Register library members.
- Record borrowed books.
- Update book availability.
- Record returned books.
- Generate reports for inventory and member activity.