EXCEL如何将数据制成图表?数据用图表表现出来,EXCEL如何将数据制成图表?数据用图表表现出来,可以让你办公更加高效,观看数据更直观。下面和大家聊聊EXCEL如何将数据制成。
关于建立数据库视图 如果表的STUDENT字段和SUBJECT字段为组合关键字,那么这样select distinct student,语文=isnull((select grade from student b where b.student=a.student and b.subject='语文'),''),数学=isnull((select grade from student c where c.student=a.student and c.subject='数学'),''),英语=isnull((select grade from student d where d.student=a.student and d.subject='英语'),''),from student a否则,这样写更保险:select distinct student,语文=isnull((select max(grade)from student b where b.student=a.student and b.subject='语文'),''),数学=isnull((select max(grade)from student c where c.student=a.student and c.subject='数学'),''),英语=isnull((select max(grade)from student d where d.student=a.student and d.subject='英语'),''),from student a
各位大神,做数据分析,通常需要用哪些图表?
求问“ 数据库对象图表编辑图表其实就是数据库表之间的关系示意图
mysql怎么把多张数据结构相同的表,合成一张视图表 create view iaeasselect `meshcg` as `cg`,`name`,`price`,`address`,`brand`,`datetime` from `mesh`unionselect `toolscg` as `cg`,`name`,`price`,`address`,`brand`,`datetime` from `tools`