Optimize Date Queries by Replacing whereYear() with whereBetween()

Replace whereYear() and whereMonth() on large database tables with whereBetween() date ranges to enable SQL index lookups.

Using whereYear('created_at', 2026) forces database engines (MySQL, PostgreSQL) to wrap the column in an SQL function (WHERE YEAR(created_at) = 2026).

Wrapping indexed columns in functions invalidates database B-Tree indexes, causing full table scans.

The Problem with whereYear()

// ❌ SLOW: SQL function YEAR(created_at) disables database index!
$orders = Order::whereYear('created_at', 2026)->get();

The High-Performance Solution: whereBetween()

Using explicit timestamp boundaries enables the database engine to perform fast range index lookups:

use Carbon\Carbon;

$startOfYear = Carbon::create(2026, 1, 1)->startOfDay();
$endOfYear = Carbon::create(2026, 12, 31)->endOfDay();

// ✅ FAST: Uses standard B-Tree range index lookup
$orders = Order::whereBetween('created_at', [$startOfYear, $endOfYear])->get();

Monthly Queries Example

// Querying a specific month (e.g. October 2026)
$orders = Order::whereBetween('created_at', [
    now()->startOfMonth(),
    now()->endOfMonth(),
])->get();

Summary

• SQL date functions (YEAR(), MONTH()) prevent query optimizers from using column indexes.
• whereBetween('created_at', [$start, $end]) utilizes B-Tree indexes for fast range scans.
• Essential optimization for tables with hundreds of thousands of records.