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check-query-efficiency

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Analyzes PHP code for query efficiency issues. Detects SELECT *, missing indexes hints, unnecessary joins, full table scans, suboptimal WHERE clauses.

skills/check-query-efficiency/SKILL.md

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Aug 16, 2026
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# Query Efficiency Analysis

Analyze PHP code for database query efficiency issues.

## Detection Patterns

### 1. SELECT * Usage

```php
// INEFFICIENT: Fetches all columns
$sql = "SELECT * FROM users WHERE id = ?";
$query = "SELECT * FROM orders JOIN products ON ...";

// EFFICIENT: Only needed columns
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