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error on sql select limit


funbinod

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why these lines are not working?

 

$sql3 = "SELECT *,sum(amt),sum(qty) FROM purchase WHERE sid=$sid AND pvn!=0 ORDER BY pvn DESC LIMIT 2";$result3 = mysqli_query($connect, $sql3) or die(mysqli_error($connect));$row3 = mysqli_fetch_array($result3);echo $row3['sum(qty)'] . "<br />";$sql4 = "SELECT *,sum(amt),sum(qty) FROM purchase WHERE sid=$sid AND pvn!=0 ORDER BY pvn DESC LIMIT 3";$result4 = mysqli_query($connect, $sql4) or die(mysqli_error($connect));$row4 = mysqli_fetch_array($result4);echo $row4['sum(qty)'] . "<br />";

they both SELECT result from the complete rows on 'purchase' table. please guide what is wrong in it!

 

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if you can use sum syntax your can use Group and declare field of table don't use select * .Example :

Select sid,pvn ,item_name,sum(amt) as amt ,sum(qty) as Qty

From purchase

Where sid=$sid AND pvn!=0

Group by sid,item_name,pvn

ORDER BY pvn DESC LIMIT 3";

 

sorry my spelling bad.

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thanks for the reply. its ok for the spelling! but the problem is still the same. its not retrieving sum from last 3 rows. its summing from complete rows.... i wish to add qty from the declared LIMIT...

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