行列轉換並且進行行列資料統計 rollup

--具體的行列轉換並且進行行列資料統計

create table tmpa 

( dept char(3) , 
sect char(3) , 
line char(3) , 
line_desc varchar(30) , 
title_code char(3) , 
title_desc varchar(30) , 
headcount int 
);

-- 加入一些資料記錄

insert into tmpa values ('da' , 's1' , 'la' , 'line a ' , 't1' , 'title desc 1', 3 );

insert into tmpa values ('da' , 's1' , 'la' , 'line a ' , 't2' , 'title desc 2' , 3 );
insert into tmpa values ('da' , 's1' , 'lb' , 'line b ' , 't1' , 'title desc 1' , 3 );
insert into tmpa values ('da' , 's1' , 'lb' , 'line b ' , 't2' , 'title desc 2' , 3 );
insert into tmpa values ('da' , 's2' , 'la' , 'line a ' , 't1' , 'title desc 1' , 3 );
insert into tmpa values ('da' , 's2' , 'lb' , 'line b ' , 't1' , 'title desc 1' , 3 );
insert into tmpa values ('db' , 's1' , 'lb' , 'line b ' , 't1' , 'title desc 1' , 3 );
insert into tmpa values ('db' , 's2' , 'la' , 'line a ' , 't1' , 'title desc 1' , 3 );
insert into tmpa values ('db' , 's2' , 'lb' , 'line b ' , 't1' , 'title desc 1' , 3 );
insert into tmpa values ('dc' , 's1' , 'la' , 'line a ' , 't1' , 'title desc 1' , 3 );
insert into tmpa values ('dc' , 's2' , 'lb' , 'line b ' , 't1' , 'title desc 1' , 3);
select * from tmpa;

-- 行轉列一 行統計

select dept,decode(sect,'s1 ',sum(headcount),0) as s1,

decode(sect,'s2 ',sum(headcount),0) as s2,
sum(headcount) as 行合計 
from tmpa 
group by dept,sect,headcount;

-- 行轉列二 行統計                  

select dept,sum(decode(sect,'s1 ',headcount,0)) as s1,

sum(decode(sect,'s2 ',headcount,0)) as s2,
sum(headcount) as 行合計 
from tmpa 
group by dept,headcount;

-- 列統計

select dept,decode(sect,'s1 ',sum(to_number(headcount)),'0') as s1,

decode(sect,'s2 ',sum(to_number(headcount)),'0') as s2,
sum(to_number(headcount)) as 行合計 
from tmpa 
group by sect,rollup(dept,headcount);

-- 行列統計

select dept,sum(decode(sect,'s1 ',headcount,0)) as s1,

sum(decode(sect,'s2 ',headcount,0)) as s2,
sum(headcount) as 行合計 
from tmpa 
group by rollup(dept);

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