idselect_typetabletypepossible_keyskeykey_lenrefrowsExtra
1SIMPLEtbl_news_categoryreffk-news-category,fk-category-newsfk-news-category4const4Using where
1SIMPLEtbl_categoryeq_refPRIMARYPRIMARY4slk_dev.tbl_news_category.category_id1Using where