在过程中用传来的参数拼串

--case when 嵌套

declare @departmentID int

;with DP (dpid,dpname,dppreid)
as
(
  select dpid,DPPreID from CRC_Department_DP dp
  where ('1'= (case when @departmentID<0 then '1'
            
               else case when DPID=@departmentID then '1' else '0' end  end))
  union all
  select a.dpid,a.dpname,a.DPPreID from CRC_Department_DP a inner join
         DP b on a.DPPreID = b.DPID
)

 

在sqlserver 中执行的很好  但是oracle 不支持