如何使用分组依据获取最后一条记录

Question

My Query :-

SELECT
    p.*,
    b.brand_name 
FROM 
    portfolio p,
    branding_category b
WHERE 
    p.category = 'BRANDING' 
AND
    p.brand_category = b.id
AND 
    is_active = '1' 
GROUP BY 
    p.brand_category
ORDER BY p.id DESC
LIMIT 10

Suppose portfolio table has :-

id  category brand_category is_active   title

1    test     8              1           abc
2    test     7              1           pqr
3    test     8              1           xyz
4    test     7              1           ijk

And I want to show Output has :- That is, the last record in each group should be returned.

id  category brand_name is_active   title

3    test     Catalogs     1         xyz
4    test     Posters      1         ijk

Edit :-

branding_category

id  brand_name
8   Catalogs
7   Posters

ie, Last row for each group. Please help me on this. I know it is there in stackoverflow Retrieving the last record in each group but I am not able to write for two table.

Answer 1

Try this :-

SELECT p.*,b.brand_name
    FROM portfolio p
      INNER JOIN branding_category b ON p.brand_category = b.id
      INNER JOIN (
        SELECT MAX(id) MaxMsgIDForThread
        FROM portfolio
        WHERE is_active = '1'

        GROUP BY brand_category
      ) g ON p.id = g.MaxMsgIDForThread
    Order by p.id Desc
    LIMIT 10

Answer 2

Try this,

 select x.id,x.category,x.brand_name,x.is_active,x.title from (
select
 p.id,p.category,pc.brand_name,p.is_active,p.title,
  ROW_NUMBER()over ( ORDER BY p.id) as Rnk
from portfolio p inner join branding_category pc
on p.brand_category=pc.id
) x where Rnk >2