--同一ID的”数值字段1的总和“、”数值字段2的总和“
select ID,SUM(数值字段1) AS 数值字段1的总和,SUM(数值字段2) AS 数值字段2的总和
FROM(
select ID,数值字段1,0 as 数值字段2 from 表1
union all
select ID,0 as 数值字段1,数值字段2 from 表2) T GROUP BY ID
--所有ID的”数值字段1的总和“、”数值字段2的总和“
select SUM(数值字段1) AS 数值字段1的总和,SUM(数值字段2) AS 数值字段2的总和
FROM(
select ID,数值字段1,0 as 数值字段2 from 表1
union all
select ID,0 as 数值字段1,数值字段2 from 表2) T
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