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1.
SELECT product_type 产品类别,
prickle 计量单位,
production_name 企业名称,
row_number() over(partition by product_type, prickle order by sum(pur.purchase_num) desc) 名次
from t_purchase_info pur
group by production_name, product_type, prickle
参考：http://www.cnblogs.com/fxgachiever/archive/2010/09/15/1826792.html
select product_type 产品类别,
prickle 计量单位,
wm_concat(case
when r = 1 then
production_name
end) 第一名,
wm_concat(case
when r = 1 then
value1
end) 申报量,
wm_concat(case
when r = 2 then
production_name
end) 第二名,
wm_concat(case
when r = 2 then
value1
end) 申报量,
wm_concat(case
when r = 3 then
production_name
end) 第三名,
wm_concat(case
when r = 3 then
value1
end) 申报量,
wm_concat(case
when r = 4 then
production_name
end) 第四名,
wm_concat(case
when r = 4 then
value1
end) 申报量,
wm_concat(case
when r = 5 then
production_name
end) 第五名,
wm_concat(case
when r = 5 then
value1
end) 申报量,
wm_concat(case
when r = 6 then
production_name
end) 第六名,
wm_concat(case
when r = 6 then
value1
end) 申报量,
wm_concat(case
when r = 7 then
production_name
end) 第七名,
wm_concat(case
when r = 7 then
value1
end) 申报量,
wm_concat(case
when r = 8 then
production_name
end) 第八名,
wm_concat(case
when r = 8 then
value1
end) 申报量,
wm_concat(case
when r = 9 then
production_name
end) 第九名,
wm_concat(case
when r = 9 then
value1
end) 申报量,
wm_concat(case
when r = 10 then
production_name
end) 第十名,
wm_concat(case
when r = 10 then
value1
end) 申报量,
wm_concat(case
when r = 11 then
production_name
end) 第十一名,
wm_concat(case
when r = 11 then
value1
end) 申报量,
wm_concat(case
when r = 12 then
production_name
end) 第十二名,
wm_concat(case
when r = 12 then
value1
end) 申报量,
wm_concat(case
when r = 13 then
production_name
end) 第十三名,
wm_concat(case
when r = 13 then
value1
end) 申报量,
wm_concat(case
when r = 14 then
production_name
end) 第十四名,
wm_concat(case
when r = 14 then
value1
end) 申报量,
wm_concat(case
when r = 15 then
production_name
end) 第十五名,
wm_concat(case
when r = 15 then
value1
end) 申报量
from (SELECT r, production_name, product_type, prickle, value1
FROM (SELECT row_number() over(partition by product_type, prickle order by sum(pur.purchase_num) desc) r,
pur.production_name,
pur.product_type,
prickle,
to_char(round(sum(pur.purchase_num), 2),
'9999999999999999999.99') value1
FROM t_purchase_info pur, t_sgproject_info pro
WHERE 1 = 1
AND pro.id = pur.project_id
AND (pro.gclb = '房屋建筑工程' OR pro.gclb IS NULL)
AND pro.status != 9
AND product_regdate >=
to_date('2014-01-01', 'yyyy-mm-dd hh24:mi:ss')
AND product_regdate <=
to_date('2014-12-31 23:59:59', 'yyyy-mm-dd hh24:mi:ss')
AND sgproject_type = 1
GROUP BY production_name, product_type, prickle)
WHERE r <= 15
ORDER BY product_type, prickle, r)
group by product_type, prickle
Oracle数据库row_number() over统计前15名企业， wm_concat(case when then)行转列
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原文地址：http://blog.csdn.net/lanqibaoer/article/details/42779923
