MYSQL CASE

			CASE
						WHEN a.STATUS='I' THEN '编辑中'
						WHEN a.STATUS='W' THEN 
							CASE WHEN a.PROC_END_DT <DATE_FORMAT( NOW(), '%Y.%m.%d%') then '完成'
									 WHEN a.PROC_START_DT <= DATE_FORMAT( NOW(), '%Y.%m.%d')<=a.PROC_START_DT then '进行中'
									 WHEN DATE_FORMAT( NOW(), '%Y.%m.%d%') < a.PROC_START_DT then '等待' 
							END
				ELSE '编辑中'
						END AS STATUS,