多組由總

Question

我可以獲取各種數據

• 的上衣

  • 女孩5
  • 男孩10

• 讓

  名
  • 女孩5名
  • 男生15

現在我想在查詢輸出增加一個額外的總計行。像

• 總
  • 女孩10
  • 男孩25

這是我的查詢

SELECT id, cloth_type, gender, qty, from 
(SELECT 
    g.id as id,cloth.type as cloth_type, g.gender as gender, g.qty as qty 
    0 AS sortorder -- added a sortorder column 
     from 
      cloth_master cloth 
      inner join 
      gender_master g on cloth.gender_id = g.id 
      group by cloth.type, g.gender g.id 
    UNION ALL 
     SELECT 
      g.id as id,cloth.type as cloth_type, g.gender as gender, g.qty as qty 
      1 AS sortorder -- added a sortorder column 
     from 
      cloth_master cloth 
      inner join 
      gender_master g on cloth.gender_id = g.id 
      group by cloth.type, g.gender g.id 
) AS unionquery 
) ORDER BY sortorderenter 

我嘗試用UNION ALL，但沒有得到確切的解決方案， 能夠任何一個人指導我一樣？

Answer 1

在Postgres中，您可以使用分組集;

select coalesce(col1, 'Total'), col2, count(*) 
from t 
group by grouping sets ((col1, col2), (col1)); 

您可以閱讀documentation約GROUPING SETS。