Question

My table(products) looks like this:

id name value
1  oil  100
2  oil  140
3  glue 120
4  glue 110

I need to select last inserted oil and last inserted glue, so result should be:

2 oil 140
4 glue 110

what have i tried:

SELECT * FROM `products` GROUP BY `name` ORDER BY `value` DESC LIMIT 2

but this query shows

1  oil  100
3  glue 120

Answer 1

You need to get the last inserted row of each type (highest id), then retrieve the data for those ids. This assumes your id numbers go up with each new insertion, so a higher id value assumes a later insert.

 SELECT d.id, d.name, d.value
   FROM products d
   JOIN (
     SELECT MAX(id) id, name
       FROM products
      GROUP BY name
   ) m ON (d.id = m.id)