Oracle 中列添加和不同行数的两张表合并

问题: Oracle 中怎么把两张行数不同的表合并成一个表？ Sql 为： select s.stagename sname, sum(nworkhours) nworkhours, sum(O

问题:

Oracle 中怎么把两张行数不同的表合并成一个表？

Sql 为：

select s.stagename sname,

sum(nworkhours) nworkhours,

sum(OVERHOURS) OVERHOURS,

sum(nworkhours+OVERHOURS)

from T_WorkDetails w,

t_stage s

where w.stageid=s.stageid and w.projectid='D0927380468F4A4EE04010AC0C051F15'

group by s.stagename

ORDER by s.stagename

 

显示为：

 

第二个SQL 为：

select sum(total) as temptal from (select s.stagename sname,

sum(nworkhours) nworkhours,

sum(OVERHOURS) OVERHOURS,

sum(nworkhours+OVERHOURS) total

from T_WorkDetails w,

t_stage s

where w.stageid=s.stageid and w.projectid='D0927380468F4A4EE04010AC0C051F15'

group by s.stagename

ORDER by s.stagename)

 

显示为：

 

 

想要显示的结果为：

 

核心思想：

 

总体的sql如下：

select * from (select s.stagename sname,

sum(nworkhours) nworkhours,

sum(OVERHOURS) OVERHOURS,

sum(nworkhours+OVERHOURS)

from T_WorkDetails w,

t_stage s

where w.stageid=s.stageid and w.projectid='D0927380468F4A4EE04010AC0C051F15'

group by s.stagename

ORDER by s.stagename) t1,

(select sum(total) as temptal from (select s.stagename sname,

sum(nworkhours) nworkhours,

sum(OVERHOURS) OVERHOURS,

sum(nworkhours+OVERHOURS) total

from T_WorkDetails w,

t_stage s

where w.stageid=s.stageid and w.projectid='D0927380468F4A4EE04010AC0C051F15'

group by s.stagename

注意：行数少的那一张表会自动补齐行数和行数多的那一张表对应

，