oracle 行转列问题

 

 1 select id,

 2        name, 

 3        sum(decode(tag_name, 'AAA', nvl(value, 0),'BBB' ,nvl(value, 0),0)) "imp_value",

 4        sum(decode(tag_name, 'C01', nvl(value, 0),'D01', nvl(value, 0), 0)) "click_value"

 5 

 6   from (SELECT a.id, a.name, d.tag_name, d.value

 7           FROM A a

 8           LEFT JOIN B b

 9             ON a.id = b.id

10           left join d d

11             on b.imp_url = d.tag_name

12         union

13         SELECT a.id, a.name, d.tag_name, d.value

14           FROM A a

15           LEFT JOIN C c

16             ON a.id = c.id

17           left join d d

18             on c.click_url = d.tag_name) m

19  group by id, name

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下面是根据id和name 将value合并成一列

 1 select id,

 2        name,

 3        to_char(WMSYS.WM_CONCAT(tag_name)) tag_name,

 4        to_char(WMSYS.WM_CONCAT(value)) value

 5   from (SELECT a.id, a.name, d.tag_name, d.value

 6           FROM A a

 7           LEFT JOIN B b

 8             ON a.id = b.id

 9           left join d d

10             on b.imp_url = d.tag_name

11         union

12         SELECT a.id, a.name, d.tag_name, d.value

13           FROM A a

14           LEFT JOIN C c

15             ON a.id = c.id

16           left join d d

17             on c.click_url = d.tag_name) m

18  group by id, name

View Code