oracle10g – DISTINCT导致ORA-01791:不是SELECT的表达式
发布时间:2020-12-12 14:03:58 所属栏目:百科 来源:网络整理
导读:select DISTINCT a.FNAME||' '||a.LNAME from AUTHOR a,books B,BOOKAUTHOR ba,customers C,orders where C.firstname='BECCA' and C.lastname='NELSON' and a.AUTHORID=ba.AUTHORID and b.ISBN=bA.ISBN order by a.LNAME 给出了ORA-01791:不是一个SELECT表
select DISTINCT a.FNAME||' '||a.LNAME from AUTHOR a,books B,BOOKAUTHOR ba,customers C,orders where C.firstname='BECCA' and C.lastname='NELSON' and a.AUTHORID=ba.AUTHORID and b.ISBN=bA.ISBN order by a.LNAME 给出了ORA-01791:不是一个SELECT表达式 如何使其工作? 只需在SELECT子句中自行添加LNAME作为列:SELECT full_name FROM ( select DISTINCT a.FNAME||' '||a.LNAME AS full_name,a.LNAME from AUTHOR a,orders where C.firstname='BECCA' and C.lastname='NELSON' and a.AUTHORID=ba.AUTHORID and b.ISBN=bA.ISBN ) order by a.LNAME 如果你只想输出第一列,你可以把整个东西放在一个子查询中。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |