21.1.Introduction | ||||
21.1.1. | Numeric Functions | |||
21.1.2. | Arithmetic Operators | |||
21.1.3. | Addition | |||
21.1.4. | To add the totals of both columns for every row | |||
21.1.5. | Subtraction | |||
21.1.6. | Total the two columns and then subtract them | |||
21.1.7. | Multiplication | |||
21.1.8. | SUM then Multiply | |||
21.1.9. | Division | |||
21.1.10. | A NULL value will be returned if you try to divide by zero |