Arithmetic & Numeric Functions: Real-World

Numeric calculations power every business application - pricing with tax, discounts, commissions, financial reports, statistical analysis. Used in invoices, dashboards, analytics, and data transformations. DECIMAL precision prevents $0.01 discrepancies in financial systems.

Invoice total reconciliation

A commerce team must calculate line totals, tax, and discounts without introducing rounding drift between checkout and finance reports.

Exact decimal arithmetic keeps customer charges and accounting totals consistent.

Calculate an exact order total

SELECT order_id, SUM(ROUND(unit_price * quantity * (1 - discount_rate), 2)) AS order_total FROM order_items GROUP BY order_id;

All