软乾报表数据集中的@是什么意思啊？？？
下面是数据集的sql
select ys.jgdmid, ys.jgmc, sum(nvl(sazs, 0)) sazs
from t_tjbb_ysbbtjzzjg ys
left join (select cl.cbdwid, count(cl.cbdwid) sazs
from t_tjbb_yssaxx cl
where cl.safsid = 'CQJLBGS'
and cl.cbdwid is not null
/~ and cl.sasj >=
to_date(?, 'yyyy-mm-dd hh24:mi:ss')~/
/~ and cl.sasj <= to_date(?|| ' 23:59:59',
'yyyy-mm-dd hh24:mi:ss')~/
group by cl.cbdwid) tmp
on @5
where 1=1 @6
group by ys.jgdmid, ys.jgmc