Oracle Code Examples

Explore best practices and effective coding techniques with Oracle through practical examples.

1. Structured Query Language (SQL)

Optimize SQL queries for performance and clarity.

Example: Select Statement

SELECT * FROM employees WHERE department_id = 10;

2. PL/SQL Programming

Implement robust stored procedures and functions.

Example: Procedure to Calculate Employee Salary

CREATE OR REPLACE PROCEDURE calculate_salary (emp_id NUMBER) AS
  v_salary NUMBER;
BEGIN
  SELECT salary INTO v_salary FROM employees WHERE employee_id = emp_id;
  -- Perform salary calculation logic
END;

3. Indexing Strategies

Improve database performance with effective indexing.

Example: Creating Index on Employee Table

CREATE INDEX idx_emp_lastname ON employees(last_name);

4. Error Handling

Implement error handling techniques to ensure robustness.

Example: Exception Handling in PL/SQL

BEGIN
  -- Code block with potential errors
EXCEPTION
  WHEN others THEN
    -- Error handling logic
END;

5. Transaction Management

Ensure data integrity and consistency with effective transaction management.

Example: Commit and Rollback

BEGIN TRANSACTION;
-- SQL statements
COMMIT;

Conclusion

These examples highlight best practices for coding with Oracle, improving performance, maintaining data integrity, and handling errors effectively. Apply these practices to optimize your Oracle database and applications.