摘要:
1) SELECT s.*,Row_Number() OVER (partition by c_name ORDER BY grade desc) rank FROM score s 2) SELECT s.*,rank() OVER (partition by c_name ORDER BY gr 阅读全文
摘要:
1)查询1-4的数据 SELECT rownum, sno, cno, score FROM (SELECT * FROM sc order by score desc) WHERE rownum < 4 2)查询2-5行的数据 SELECT rn, sno, cno, score FROM (SE 阅读全文