What are best practices for handling SQL queries in PHP to avoid duplicate results?

To avoid duplicate results when handling SQL queries in PHP, you can use the DISTINCT keyword in your SQL query to ensure only unique results are returned. Additionally, you can use GROUP BY clause to group results by a specific column to avoid duplicates. 

// Example SQL query with DISTINCT keyword
$sql = "SELECT DISTINCT column_name FROM table_name";

// Example SQL query with GROUP BY clause
$sql = "SELECT column_name FROM table_name GROUP BY column_name";

Keywords

SQL queries PHP duplicate results data validation prepared statements

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