Question

I have a few tables, I wrote a sql to join those tables and insert the result to a final table. The final table is tb(account, date), account is a primary key. The problem came from the result of the query, which would look like following:

account     date
0001        09/01/2012
0001        09/02/2012
0002        09/01/2012
0003        09/03/2012

when I insert above those result records, I got Violation of PRIMARY KEY constraint error. How do I fix the query, I could get the result records like following

account     date
0001        09/02/2012 (get the latest date)
0002        09/01/2012
0003        09/03/2012

Thanks.

Answer 1

How about

INSERT INTO SomeOtherTable (account, DATE)
SELECT account,
MAX(date)
FROM YourTable
GROUP BY account

It would make a lot more sense if you were to show us the table schemas, original query, and soem example data.