Category Post by ID
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'category', 'terms' => '1', 'field' => 'term_taxonomy_id', 'operator' => 'IN', 'include_children' => false, ), array( ), );
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'category', 'terms' => '1', 'field' => 'term_taxonomy_id', 'operator' => 'IN', 'include_children' => false, ), array( ), );