Functions
Select
Retrieve data based on specified criteria.
Example: `SELECT * FROM users WHERE age > 25;`
Insert
Add new data to the database.
Example: `INSERT INTO products (name, price) VALUES ('Widget', 19.99);`
Update
Modify existing data.
Example: `UPDATE orders SET status = 'Shipped' WHERE order_id = 123;`
Delete
Remove data from the database.
Example: `DELETE FROM customers WHERE customer_id = 456;`
About Functions
SQL functions are crucial for database manipulation and data processing.
They handle common tasks such as data filtering, aggregation, and transformation.