PHP 공부 ( MYSQL + ) UNION 과 게시글 페이징 처리

<a onclick="if ( confirm('삭제할까요?') == false ) return false;" href="./doDelete.php?id=<?=$article['id']?>">삭제</a></td>


SELECT cateId, COUNT(*) AS board_count
FROM board WHERE cateId = 'IT';
UNION
SELECT cateId, COUNT(*) AS board_count
FROM board
WHERE cateId = '축구';

UNION  붙일수잇다 -> UNION으로 각 게시판 별 글 갯수 출력 가능 

SELECT boardId, COUNT(*)
FROM article
GROUP BY boardId;

* 중요  위에하고 결과는 똑같

group by ~~ -> 여기여기 붙어라 ?!