desc programming_lang;
desc cnt;
SELECT * from programming_lang;
SELECT * from cnt;
SELECT a.id as lang_id, a.name as name, b.cnt as cnt FROM programming_lang a LEFT JOIN cnt b on a.id=b.lang_id;
SELECT a.id as lang_id, a.name as name, b.cnt as cnt FROM programming_lang a right JOIN cnt b on a.id=b.lang_id;