在关系数据库设计中，关系模式设计属于( )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29842' and id < 2421934 and id<>'2421934' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29842' and id > 2421934 and id<>'2421934' order by id asc limit 5