title: oracle水廠收費系統練習拓展
date: 2018-1-28 22:05:23
categories: oracle
tags: oracle
-- 統計某日的收費，按區域分組彙總
select (select name from t_area where id = t.areaid) 區域, sum(usernum)/1000 用水量, sum(money) 金額
from t_account t
where to_char(t.feedate, 'yyyy-mm-dd')='2012-05-14'
group
by t.areaid;
-- 注意：以上語句中areaid，如果在沒有分組的情況下，不能直接跟sum函式拼接查詢
-- 統計某收費員某日的收費，按區域分組彙總
select (select name from t_area where id = ac.areaid) 區域, sum(usernum)/1000 用水量, sum(money) 金額
from t_account ac
where to_char(ac.feedate, 'yyyy-mm-dd') = '2012-05-14'
and ac.feeuserid = 2
group
by ac.areaid;
-- 統計某年某月的收費記錄，按區域分組彙總
select (select name from t_area where id = ac.areaid) 區域, sum(usernum)/1000 用水量, sum(money) 金額
from t_account ac
where to_char(ac.feedate, 'yyyy-mm') = '2012-05'
group
by ac.areaid;
select (select name from t_area where id = ac.areaid) 區域, sum(usernum)/1000 用水量, sum(money) 金額
from t_account ac
where to_char(ac.meterdate, 'yyyy-mm-dd') = '2018-01-26'
group
by ac.areaid;
select to_char(ac.meterdate, 'yyyy-mm-dd') from t_account ac
-- 統計某收費員某年某月的收費記錄，按區域分組彙總
select (select name from t_area where id = ac.areaid) 區域, sum(usernum)/1000 用水量, sum(money) 金額
from t_account ac
where to_char(ac.feedate, 'yyyy-mm') = '2012-05'
and ac.feeuserid = 2
group
by ac.areaid;
-- 統計某年收費情況，按區域分組彙總
select (select name from t_area where id = ac.areaid) 區域, sum(usernum)/1000 用水量, sum(money) 金額
from t_account ac
where to_char(ac.feedate, 'yyyy') = '2012'
group
by ac.areaid;
-- 統計某年收費情況，按月份分組彙總
select ac.month 月份, sum(usernum)/1000 用水量, sum(money) 金額
from t_account ac
where to_char(ac.feedate, 'yyyy') = '2013'
group
by ac.month
order
by ac.month;
-- 統計某年收費情況，按月份分組彙總
select
'用水量'統計項,
sum(case
when ac.month = '01'
then usernum end) 一月,
sum(case
when ac.month = '02'
then usernum end) 二月,
sum(case
when ac.month = '03'
then usernum end) 三月,
sum(case
when ac.month = '04'
then usernum end) 四月,
sum(case
when ac.month = '05'
then usernum end) 五月,
sum(case
when ac.month = '06'
then usernum end) 六月,
sum(case
when ac.month = '07'
then usernum end) 七月,
sum(case
when ac.month = '08'
then usernum end) 八月,
sum(case
when ac.month = '09'
then usernum end) 九月,
sum(case
when ac.month = '10'
then usernum end) 十月,
sum(case
when ac.month = '11'
then usernum end) 十一月,
sum(case
when ac.month = '12'
then usernum end) 十二月
from t_account ac where to_char(ac.feedate, 'yyyy') = '2013'
union
allselect
'金額'統計項,
sum(case
when ac.month = '01'
then money end) 一月,
sum(case
when ac.month = '02'
then money end) 二月,
sum(case
when ac.month = '03'
then money end) 三月,
sum(case
when ac.month = '04'
then money end) 四月,
sum(case
when ac.month = '05'
then money end) 五月,
sum(case
when ac.month = '06'
then money end) 六月,
sum(case
when ac.month = '07'
then money end) 七月,
sum(case
when ac.month = '08'
then money end) 八月,
sum(case
when ac.month = '09'
then money end) 九月,
sum(case
when ac.month = '10'
then money end) 十月,
sum(case
when ac.month = '11'
then money end) 十一月,
sum(case
when ac.month = '12'
then money end) 十二月
from t_account ac where to_char(ac.feedate, 'yyyy') = '2013';
-- 根據業主型別分別統計每種居民的用水量（整數，四捨五入）及收費金額 ，如果該型別在臺賬表中無資料也需要列出值為0的記錄
select ow.name, nvl(round(sum(usernum)/1000), 0) 用水量, nvl(sum(money),0) 金額
from t_ownertype ow, t_account ac
where ow.id=ac.ownertypeid(+)
group
by ow.name;
-- 統計每個區域的業主戶數，並列出合計
select ar.name 區域, count(ow.id) 業主戶數
from t_area ar, t_owners ow, t_address ad
where ar.id=ad.areaid and ow.addressid=ad.id
group
by ar.name
union
allselect
'統計', count(*) from t_owners;
-- 統計每個區域的業主戶數，如果該區域沒有業主戶數也要列出0
select ar.name 區域,count(owad.id) 業主戶數
from t_area ar ,
(select ow.id,ow.name,ad.areaid from t_owners ow,t_address ad where ow.addressid=ad.id
)owad
where ar.id=owad.areaid(+)
group
by ar.name
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