I want to compare two prices in my database. I get a row with any id:

$price1 = $wpdb->get_row( "SELECT * FROM $wpdb->prices WHERE id = 10" );

I want to get up the row from this table means I want to get row same bellow but if row by id 9 is deleted it’s missing:

$price1 = $wpdb->get_row( "SELECT * FROM $wpdb->prices WHERE id = 9" );

How do this?