PL-SQL

select line_id, line_status,
CASE
WHEN LINE_STATUS='Z' and (select 'X'
from te_leaseline
where pre_app_sn=a.app_sn and line_status='A')='X' THEN '非使用中'
WHEN LINE_STATUS IN ('Z','A','2','5','8') THEN '使用中'
ELSE '非使用中'
END as "WBS STATUS"
from te_leaseline a