cs8 database posts
$tax_query = array( array( 'taxonomy' => 'subject', 'terms' => 'computer-science-8', ), array( 'taxonomy' => 'unit', 'terms' => 'cs8-3-database', 'field' => 'slug', ), );
$tax_query = array( array( 'taxonomy' => 'subject', 'terms' => 'computer-science-8', ), array( 'taxonomy' => 'unit', 'terms' => 'cs8-3-database', 'field' => 'slug', ), );