Question

I know this sounds rather confusing but I’m at a loss how to explain it better. I have a table simplified below:

DB Type       ID
================
Table1         1                 
Table1         2                 
Table1         3                 
Table1         4                 
Table1         5                 
Table2         6                 
Table2         7                 
Table2         8                 
Table2         9                 
Table2        10 

what i am trying to achieve is to basically clean out this table but keep the record with the highest ID for each DB Type if that makes sense – so in this case it would be (Table1,5) and (Table2,10) with all other records being deleted. Is it possible to do this exclusively through MySQL?

*EDIT***

Answer thanks to tips from Yogendra Singh

DELETE FROM MyTable WHERE ID NOT IN (SELECT * FROM (SELECT MAX(ID) from MyTable GROUP BY DB Type) AS tb1 ) ORDER BY ID ASC

Answer 1

TRY selecting the max ID group by db_type first and then use it as sub query with not in.

 DELETE FROM MyTable 
 WHERE ID NOT IN 
    (SELECT ID FROM 
      (SELECT MAX(ID) AS ID from MyTable GROUP BY DB Type) AS tb1
    )

EDIT:

 DELETE FROM MyTable
 HAVING MAX(ID) > ID;