SELECT Customer,SUM(OrderPrice) FROM Orders
WHERE Customer='Bush' OR Customer='Adams'
GROUP BY Customer
HAVING SUM(OrderPrice)>1500
Select sum(downloads) as download from factdownloads_new
where date_time='2013-12-11' and storename='anzhi'
结果:3595443702 3253205502 3631413902 3342157901
用别名as:
Select sum(downloads) from factdownloads_new
where date_time='2013-12-11' and storename='hiapk'
结果:8937649006 8927173006 8952359006 8978768006
sum函数
引自:http://www.w3school.com.cn/sql/sql_groupby.asp
SQL GROUP BY 实例
我们拥有下面这个 "Orders" 表:
O_Id | OrderDate | OrderPrice | Customer |
---|---|---|---|
1 | 2008/12/29 | 1000 | Bush |
2 | 2008/11/23 | 1600 | Carter |
3 | 2008/10/05 | 700 | Bush |
4 | 2008/09/28 | 300 | Bush |
5 | 2008/08/06 | 2000 | Adams |
6 | 2008/07/21 | 100 | Carter |
现在,我们希望查找每个客户的总金额(总订单)。
我们想要使用 GROUP BY 语句对客户进行组合。
我们使用下列 SQL 语句:
SELECT Customer,SUM(OrderPrice) FROM Orders GROUP BY Customer
结果集类似这样:
Customer | SUM(OrderPrice) |
---|---|
Bush | 2000 |
Carter | 1700 |
Adams | 2000 |
sum与having一起使用
过滤数据结果:HAVING 子句筛选满足条件的结果集
在 SQL 中增加 HAVING 子句原因是,WHERE 关键字无法与合计函数一起使用
这个 "Orders" 表:
O_Id | OrderDate | OrderPrice | Customer |
---|---|---|---|
1 | 2008/12/29 | 1000 | Bush |
2 | 2008/11/23 | 1600 | Carter |
3 | 2008/10/05 | 700 | Bush |
4 | 2008/09/28 | 300 | Bush |
5 | 2008/08/06 | 2000 | Adams |
6 | 2008/07/21 | 100 | Carter |
现在,我们希望查找订单总金额少于 2000 的客户。
我们使用如下 SQL 语句:
SELECT Customer,SUM(OrderPrice) FROM Orders GROUP BY Customer HAVING SUM(OrderPrice)<2000
结果集类似:
Customer | SUM(OrderPrice) |
---|---|
Carter | 1700 |
现在我们希望查找客户 "Bush" 或 "Adams" 拥有超过 1500 的订单总金额。
我们在 SQL 语句中增加了一个普通的 WHERE 子句:
SELECT Customer,SUM(OrderPrice) FROM Orders WHERE Customer='Bush' OR Customer='Adams' GROUP BY Customer HAVING SUM(OrderPrice)>1500
结果集:
Customer | SUM(OrderPrice) |
---|---|
Bush | 2000 |
Adams | 2000 |