Learndash_Admin_Filter_Post::get_sql_join_clause()
Method: Returns the SQL join clause to apply this filter.
@since: 4.2.0
@package: LearnDash / Filters
Source Files: includes/admin/classes-filters/class-learndash-admin-filter-post.php
@package: LearnDash / Filters
Source Files: includes/admin/classes-filters/class-learndash-admin-filter-post.php