SQL query last transactions

Question

You can't see on the image but I have many till_id numbers. (1,2,3,4,5).

What I want to do is just showing the last "trans_num" without repeating the till_id.

For example:

till_id    trans_num

1          14211

2          14333

3          14555

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Answer 1

A typical way to do this is:

select t.*
from t
where t.trans_date = (select max(t2.trans_date)
                      from t t2 
                      where t2.till_id = t.till_id
                     );

SQL query last transactions

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