如何把这几条sql语句合成一条查出来
日期：2014-05-18 浏览次数：20689 次
怎么把这几条sql语句合成一条查出来？
OState int not null--订单状态'1=新订单,2=订单确认,3=发货,4=订单结束',
select count(*) as '新订单' from Orders where OState=1
select count(*) as '确认订单' from Orders where OState=2
select count(*) as '发货订单' from Orders where OState=3
select count(*) as '成交订单' from Orders where OState=4
------解决方案--------------------
OState int not null--订单状态'1=新订单,2=订单确认,3=发货,4=订单结束',
select count(*) as '新订单' from Orders where OState=1
select count(*) as '确认订单' from Orders where OState=2
select count(*) as '发货订单' from Orders where OState=3
select count(*) as '成交订单' from Orders where OState=4
------解决方案--------------------
- SQL code
select sum(case when OState=1 then 1 else 0 end) as '新订单' , sum(case when OState=2 then 1 else 0 end) as '确认订单' sum(case when OState=3 then 1 else 0 end) as '发货订单', sum(case when OState=4 then 1 else 0 end) as '成交订单' from Orders
------解决方案--------------------
- SQL code
select sum(case when OState=1 then 1 else 0 end)新订单 ,sum(case when OState=2 then 1 else 0 end)确认订单 , sum(case when OState=3 then 1 else 0 end)发货订单 , sum(case when OState=4 then 1 else 0 end)成交订单 from Orders
------解决方案--------------------
- SQL code
SELECT SUM(CASE WHEN OState = 1 THEN 1 ELSE 0 END) 新订单,
SUM(CASE WHEN OState = 2 THEN 1 ELSE 0 END) 确认订单,
SUM(CASE WHEN OState = 3 THEN 1 ELSE 0 END) 发货订单,
SUM(CASE WHEN OState = 4 THEN 1 ELSE 0 END) 成交订单
FROM Orders
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