從兩個不同的表中添加兩列

Question

我有兩個表具有相同的字段類型。 此處常見的字段是* BG_ID *和商店編號 。 現在，我想從兩個表，並將它們按BG_ID SUM兩列（* total_area *和* total_area_blk *）。

以下是我嘗試不起作用的內容：

 select t.bg_id, t.store_number,sum(a.total_area),sum(b.total_area_blk)
 from (select bg_id,store_number,total_area
 from temp_Prop_area_block a
 where store_number='33665'
 union all
 select bg_id,store_number,total_area_blk 
 from temp_Prop_area_BG b
 where store_number='33665')

Answer 1

希望對您有幫助！

SELECT bg_id,  store_number,  SUM(total_area)
FROM
  (
    SELECT bg_id,  store_number,  total_area as total_area
    FROM temp_Prop_area_block a
    WHERE store_number='33665'
    UNION ALL
    SELECT bg_id,   store_number,  total_area_blk as total_area
    FROM temp_Prop_area_BG b
    WHERE store_number='33665'
  ) my_view
GROUP BY bg_id, store_number;