Question

Im having a table with notes. Below is a small sample of data of my db.

Id  register_no     name        classification      possibility
1   112             Ben         Red                 10%
2   112             Ben         Red                 10%
3   113             Ben         Red                 20%
4   112             Ben         Amber               30%
5   112             Ben         Amber               10%
6   113             Ben         Amber               30%
7   113             Ben         Red                 10%
8   112             Ben         Red                 50%

I’m sorry i interpreted the question in a wrong manner.

Actually what i wanted is to retrieve the last inserted record for each register_no because sales_log table holds a list progress…

for an example
Register_no 112 has 12 records in the database and the last record is 90% (it progressed from 10,40,60% so all of these records are in the db)

what i want is to get the 90% of register_no 112 and so on… its not just one record… there is around 500 register_no and i want to get the last entry for each register_no

hope it makes sense this time

Answer 1

You should try this query to get the notes for register numbers having maximum id value:

SELECT n1.*
FROM   notes n1
       LEFT JOIN notes n2
           ON (n1.register_no = n2.register_no AND n1.id < n2.id)
WHERE  n2.id IS NULL;

Source: Retrieving the last record in each group