1 明确数据分析目标

统计每个小时产生的订单个数

2 创建用于保存数据分析结果的表

create table app_hour_orders(id int primary key auto_increment,daystr varchar(20),hourstr varchar(20),cnt int
);

3 编写SQL语句进行数据分析

selectsubstring(createTime,1,10) as daystr,substring(createTime,12,2) as hourstr,count(*) as cnt
from ods_finebi_orders
group bysubstring(createTime,1,10),substring(createTime,12,2)
order by hourstr;

4 加载数据到结果表中

insert into app_hour_orders
selectnull,substring(createTime,1,10) as daystr,substring(createTime,12,2) as hourstr,count(*) as cnt
from ods_finebi_orders
group bysubstring(createTime,1,10),substring(createTime,12,2)
order by hourstr;