Question

I have a table in MSSQL as below :

I want to create a sql to select last bid record grouped by each productID.

So the result will be 3 records (row 13, row 15 and row 17).

My current sql is something like this :

select top 1 * 
from Bid 
order by bidDate desc
group by productID

There is an error shown :

Msg 156, Level 15, State 1, Line 1
Incorrect syntax near the keyword 'group'.

Anyone can help me?

Answer 1

The correct syntax near group by may be, unless you are in mysql, because you can’t SELECT * in a GROUP BY query.

To solve your problem you can:

SELECT 
    B.*
FROM
    (
    SELECT 
        MAX(bidDate) maxDate,
        productID
    FROM
        Bid
    GROUP BY
        productID
    ) Q INNER JOIN Bid B
    ON Q.maxDate = B.bidDate
    AND Q.productID = B.productID