Get WordPress SQL query details

When I debug WordPress, getting SQL query details is useful in some situations.

In the WordPress plugin repo, we can find some nice debug plugins to get query details. Also, we can use default WordPress options to get query details.

First, we need to add a definition in our wp-config.php.

define('SAVEQUERIES', true);

The SAVEQUERIES definition saves the database queries to an array and we can use that array to analyze those queries.

The array is stored in the global $wpdb->queries.

Print last SQL query string

$wpdb->last_query

Print last SQL query result

$wpdb->last_result

Print last SQL query Error

$wpdb->last_error