Display Content if custom meta box checkbox is checked

Use get_post_meta to fetch each value and compare against ‘yes’. E.g.

if(get_post_meta($post->ID, 'ui-ux-design', true) == 'yes') {
  //show relevant content
}

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)