sql笔记

select t.*,
(select wm_concat(d.xcdw)
from gwrq_rygk_xctb_xcdw d
where d.xcbh = t.xcbh) as jsdw,
(select wm_concat(d.xcdwmc)
from gwrq_rygk_xctb_xcdw d
where d.xcbh = t.xcbh) as jsdwmc,
(select count(0) from gwrq_rygk_xctb_xcdw d where d.xcbh = t.xcbh) as hfzs,
(select count(0)
from gwrq_rygk_xctb_xcdw d
where d.xcbh = t.xcbh
and d.hfzt = '1') as yhfzs
from gwrq_rygk_xctb t
where 1 = 1