请教一个问题,我想用SQL做一个统计:
请教一个问题,我想用SQL做一个统计:
select count(distinct "worker"."age","worker"."job")
into :l_count
from "worker" ;
统计WORKER里面不重复(年龄、职位)的人共多少,可是上面
的SQL语法错误,
select count(distinct "worker"."age")
into :l_count
from "worker" ; 这句语法正确,两个迭加就不行,
特请教。