ÕªÒª£º ÅÅÐò order by ĬÈÏÕýÐò asc µ¹Ðò desca56爆大奖在线娱乐×Ö¶ÎÓÒÉÏ½Ç µ¥»÷¿ÉÒÔÅÅÐò(ÕýÐòµ¹Ðò¶¼¿ÉÒÔ) -- °´Ò»¸ö×ֶεÄÅÅÐò ĬÈÏÕýÐòselect * from emp e order by e.sal;-- ¼ÓÉÏÕýÐò¹Ø¼ü×ÖÒ²ÊÇ¿ÉÒÔµÄselect * from emp e order by e.s ÔĶÁÈ«ÎÄ
posted @ 2022-03-01 18:23 oNice ÔĶÁ(178) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º -- ɾ³ý±ídrop table -- ½¨±ícreate table -- ±í×¢ÊÍcomment on table ... is ...-- ×Ö¶Î×¢ÊÍcomment on column ... is ... -- ²éѯselect * from -- Ôö¼Óinsert into ... values ÔĶÁÈ«ÎÄ
posted @ 2022-03-01 18:15 oNice ÔĶÁ(18) ÆÀÂÛ(0) ÍƼö(0) ±à¼­
ÕªÒª£º -- Óï·¨ select * |ÁÐÃû|±í´ïʽ -- 5 from ±íÃû -- 1 where Ìõ¼þ -- 2 group by ÁÐÃû -- 3having Ìõ¼þ -- 4 order by ÁÐÃû [asc/desc] -- 6 ±¨´í ²»ÊÇgroup by±í´ïʽ²éѯ×ֶθú·Ö×é×ֶβ»Ò»Ö·Ö×é×Ö¶a56爆大奖在线娱乐ªÓë²éѯ ÔĶÁÈ«ÎÄ
posted @ 2022-03-01 18:06 oNice ÔĶÁ(285) ÆÀÂÛ(0) ÍƼö(1) ±à¼­