SELECT 地区1 as 地区, 产品, [占比1]*[销售指标]/100 AS 指标
FROM 表
WHERE (([占比1]*[销售指标]/100<>0))
union SELECT 地区2 as 地区, 产品, [占比2]*[销售指标]/100 AS 指标
FROM 表
WHERE (([占比2]*[销售指标]/100<>0))
union SELECT 地区3 as 地区, 产品, [占比3]*[销售指标]/100 AS 指标
FROM 表
WHERE (([占比3]*[销售指标]/100<>0))