meta_query

$meta_query = array(
	'relation' => 'OR',
	array(
		'key'     => 'basic_data_airing_dates_starting_date',
		'value'   => '201707',
		'compare' => 'LIKE',
	),
	array(
		'key'     => 'basic_data_airing_dates_starting_date',
		'value'   => '201708',
		'compare' => 'LIKE',
	),
	array(
		'key'     => 'basic_data_airing_dates_starting_date',
		'value'   => '201709',
		'compare' => 'LIKE',
	),
);