日期:2014-05-17  浏览次数:21002 次

求sql,数据汇总
问题描述:
有两个表,表A 单位表,三级单位,通过parentid进行级别间的关联
  表B 统计值表,二三级单位会有一个value值。
想要的结果:表A和表B关联,要求对二级单位分组汇总value值,包括二级单位的value值和parentid为二级单位的value值。
 比如A-1单位,获得A-1的value+code为12324的value+code为32434的vaue

附带建表语句的插入语句
--A表
create table A (code varchar2(10),parentcode varchar2(10));
--第一级别
insert into A values('1506001','');
--第二级别
insert into A values('A-1','1506001');
insert into A values('B-1','1506001');
insert into A values('A-2','1506001');
insert into A values('C-1','1506001');
--第三级别
insert into A values('12324','A-1');
insert into A values('32434','A-1');
insert into A values('aaaaa','A-2');
insert into A values('ccccc','C-1');
insert into A values('bbbbb','B-1');
DELETE FROM A
select * from A

--B表
--二级可能有数据,也可能没有
create table B(code varchar2(10),value int);
insert into B values('A-1',200);
insert into B values('B-1',50);


insert into B values('12324',522);
insert into B values('32434',500);
insert into B values('aaaaa',100);
insert into B values('ccccc',200);
insert into B values('bbbbb',300);


------解决方案--------------------
SQL code

Select t1.Parentcode, Sum(t1.Value)
  From (Select t.Code code,
               Decode(t.Parentcode, '1506001', t.Code, t.Parentcode) Parentcode,
               t.Value Value
          From (Select a.Code Code,
                       a.Parentcode Parentcode,
                       Decode(b.Value, '', 0, b.Value) Value
                  From a, b
                 Where a.Code = b.Code(+)) t
         Start With t.Parentcode = '1506001'
        Connect By t.Parentcode = Prior t.Code)t1
 Group By t1.Parentcode

------解决方案--------------------
Select t1.Parentcode, Sum(t1.Value)
From (Select t.Code code,
Decode(t.Parentcode, '1506001', t.Code, t.Parentcode) Parentcode,
t.Value Value
From (Select a.Code Code,
a.Parentcode Parentcode,
Decode(b.Value, '', 0, b.Value) Value
From a, b
Where a.Code = b.Code(+)) t
Start With t.Parentcode = '1506001'
Connect By t.Parentcode = Prior t.Code)t1
 Group By t1.Parentcode

------解决方案--------------------
SQL code
SELECT substr(p, 2, instr(p, ',', 1, 2) - 2) code, SUM(VALUE)
  FROM (SELECT LEVEL, a.*, b.value, sys_connect_by_path(a.code, ',') || ',' p
          FROM a, b
         WHERE a.code = b.code(+)
         START WITH a.parentcode = '1506001'
        CONNECT BY PRIOR a.code = a.parentcode)
 GROUP BY substr(p, 2, instr(p, ',', 1, 2) - 2)