Wordpress to display query post lists arguments on frontend side.

$args = array(
'category__and' => array(1,3), // finding categories 1 & 3
'posts_per_page' => 10,
//'posts_per_page' => -1 , // fetch all posts from db
'year' => 2015,
'monthnum' => 05,
'orderby' => 'title',
'post_type' => 'post',
'category_name' => 'my-category-slug', // finding only current slug category posts
'order' => 'DESC'
);


//Starting with version 4.1, meta_query clauses can be nested in order to construct complex queries. For example, "show me productss where color=orange OR color=red&size=small" translates to the following:
$args = array(
'post_type'  => 'product',
'meta_query' => array(
'relation' => 'OR',
array(
'key'     => 'color',
'value'   => 'orange',
'compare' => '=',
),
                array(
                        'relation' => 'AND',
                        array(
                                'key' => 'color',
                                'value' => 'red',
                                'compare' => '=',
                        ),
                        array(
                                'key' => 'size',
                                'value' => 'small',
                                'compare' => '=',
                        ),
),
),
);
$query = new WP_Query( $args );






$args = array(
'post_type'  => 'my_custom_post_type',
'meta_key'   => 'age',
'orderby'    => 'meta_value_num',
'order'      => 'ASC',
'meta_query' => array(
array(
'key'     => 'age',
'value'   => array( 3, 4 ),
'compare' => 'IN',
),
),
);
$query = new WP_Query( $args );

//Return posts between 9AM to 5PM on weekdays
$args = array(
'date_query' => array(
array(
'hour'      => 9,
'compare'   => '>=',
),
array(
'hour'      => 17,
'compare'   => '<=',
),
array(
'dayofweek' => array( 2, 6 ),
'compare'   => 'BETWEEN',
),
),
'posts_per_page' => -1,
);
$query = new WP_Query( $args );






$paged = ( isset( $_GET['pg'] ) && intval( $_GET['pg'] ) > 0 )? intval( $_GET['pg'] ) : 1;
$query_args = array(
'post_type' => 'post',
'paged' => $paged,
'posts_per_page' => 1
);
query_posts( $query_args );