How can one ensure that all non-aggregated columns are included in the GROUP BY clause to avoid errors in SQL queries in PHP?

When using GROUP BY in SQL queries in PHP, all non-aggregated columns in the SELECT statement must also be included in the GROUP BY clause to avoid errors. To ensure this, carefully review the columns selected in the SELECT statement and include all non-aggregated columns in the GROUP BY clause. 

// Example SQL query with GROUP BY clause
$sql = "SELECT column1, column2, SUM(column3) 
        FROM table_name 
        GROUP BY column1, column2";

Keywords

PHP SQL queries GROUP BY clause non-aggregated columns errors

Related Questions