sql的行转列(case when) sqlserver.net

行转列之前SQL

SELECT zhenshi, status, COUNT(1) AS n
FROM [MyPlan]
WHERE 1 = 1
	AND leibie = 1
	AND [SickID] = 0
	AND zhenshi <> '协同诊疗'
	AND t >= '2020-06-06 00:00:00'
	AND t < '2020-06-08 00:00:00'
GROUP BY zhenshi, status

行转列之前的运行结果 

------------------------------------------------------------------------------------------------------

行转列之后SQL

select 0
		,zhenshi
		,sum(case --status
			when status!='完成' then n
			else 0
		end) '预约病人数量'
		,sum(case status
			when '已来诊' then n
			else 0
		end) '已来诊'
		,sum(case --status
			when status!='已来诊' and status!='完成' then n
			else 0
		end) '未来诊'
		from
		(
			select zhenshi,status,count(1) n
			--CASE status WHEN '开启' THEN status ELSE '开启' END,
			--CASE status WHEN '已来诊' THEN status ELSE '已来诊' END,
			--CASE status WHEN '未来诊' THEN status ELSE '未来诊' END
			
			FROM [MyPlan] where 1=1 and leibie=1 and [SickID] =0 and zhenshi<>'协同诊疗' --and status='已来诊' 
			--and zhenshi='好孕一组'
			and t>='2020-06-06 00:00:00' and t<'2020-06-08 00:00:00'
			group by zhenshi,status
		)t
		where t.zhenshi!=''
		group by zhenshi

行转列之后的运行结果

这时候再去程序里遍历，就简单显示了。

这里只做行转列。

列转行暂未写-2020.06.07