dBase Programming
dBase is a database management system (DBMS) that provides a simple way to store, manage, and retrieve data using dBase programming language (dBL). It was one of the first widely used database systems for personal computers and influenced many later database technologies, such as FoxPro and Microsoft Access.
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Key Features of dBase:
Uses the .DBF file format for database storage.
Supports procedural programming for database manipulation.
Provides a Command Line Interface (CLI) and GUI-based development.
Includes built-in indexing, searching, and report generation features.
Can be used for small to medium-scale database applications.
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Basic dBase Programming Concepts:
1. Creating a Database
To create a new database file:
CREATE TABLE employees
(ID INT, Name CHAR(50), Age INT, Salary FLOAT)
2. Adding Data
To insert records into the database:
INSERT INTO employees VALUES (1, "John Doe", 30, 50000.00)
INSERT INTO employees VALUES (2, "Jane Smith", 28, 60000.00)
3. Viewing Data
To display the stored records:
LIST
4. Searching & Filtering
To find specific records:
SELECT * FROM employees WHERE Age > 25
5. Updating Records
To modify an existing record:
UPDATE employees SET Salary = 55000.00 WHERE ID = 1
6. Deleting Records
To remove a record from the database:
DELETE FROM employees WHERE ID = 2
7. Creating Indexes
To speed up searches:
INDEX ON Name TO name_index
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Applications of dBase
- Small business inventory management.
- Customer record-keeping.
- Point of Sale (POS) systems.
- Accounting and payroll applications.
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Although dBase is less commonly used today, its principles apply to modern databases like MySQL, PostgreSQL, and Microsoft SQL Server.
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