7,388
社区成员
发帖
与我相关
我的任务
分享关于SQL语句的问题,请各位高手指点,在线等待,对了即给分!
select
l_returnflag,
l_linestatus,
sum(l_quantity) as sum_qty,
sum(l_extendedprice) as sum_base_price,
sum(l_extendedprice * (1 - l_discount)) as sum_disc_price,
sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge,
avg(l_quantity) as avg_qty,
avg(l_extendedprice) as avg_price,
avg(l_discount) as avg_disc,
count(*) as count_order
from
lineitem
where
l_shipdate <=date('1998-12-01')-interval 77 day
where里的是什么意思啊??
l_returnflag,
l_linestatus,
sum(l_quantity) as sum_qty,
sum(l_extendedprice) as sum_base_price,
sum(l_extendedprice * (1 - l_discount)) as sum_disc_price,
sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge,
avg(l_quantity) as avg_qty,
avg(l_extendedprice) as avg_price,
avg(l_discount) as avg_disc,
count(*) as count_order
from
lineitem
where
l_shipdate <=date('1998-12-01')-interval 77 day
where里的是什么意思啊??
...全文
请发表友善的回复…
发表回复
freecolor 2003-09-12
- 打赏
- 举报
可能是指1998/12/01前的77天?
hutulaodao 2003-09-12
- 打赏
- 举报
where 后面是你要选择的条件.
