Before the project by querying the underlying data are then assembled TreeGrid business layer corresponding to the data structure. But the personal feeling, if provided excel export while providing a tree structure to show a total of more trouble, so he wrote a.
----树形结构orgcode不能重复，所以用orgCode+subejctstages组装
select m.orgCode || n.subejctstages orgCode,
orgName,
orglevel,
case
when length(m.orgCode) = 6 and n.subejctstages is not null then
orgCode
else
pcode
end pcode,
subejctstages
from (select distinct a.code orgCode,
a.name orgName,
a.orglevel,
a.pcode
from org a
left join (select a.testid, a.testcampuscode
from subjectregister a
where a.testid = :testID
and a.testcampuscode like :orgCode
group by a.testid, a.testcampuscode
having count(1) > 0) c
on a.testid = c.testid
--and a.code = c.testcampuscode
and (a.code = c.testcampuscode or
a.code = substr(c.testcampuscode, 0, 5) or
a.code = substr(c.testcampuscode, 0, 2))
where a.testid = :testID1
a.code like and: orgCode1
and a.enable = :enable
Not c.testcampuscode IS null and) m
left the Join (
--- if the query results to add one, and when it is a specified number of columns of values, a temporary table can be assembled
SELECT '' subejctstages
from Dual
Union
SELECT '. 1' subejctstages
from Dual
Union
SELECT '2' subejctstages
from Dual) n-
ON length (m.orgCode). 6 =