如何从MySQL中的列中选择总值？

Question

Here's what I'm currently using:

$query = mysql_query(" SELECT vote_count FROM votes ");
while ($row = mysql_fetch_array($query)) {    
    $total_votes += $row['vote_count'];
}

echo $total_votes;

Is there a more concise way, perhaps in the query itself without having to use the while loop?

Answer 1

You can use the MySQL sum function and get the sum from MySQL itself:

SELECT sum(vote_count) AS vote_count_sum FROM votes

Fetch the single row that the query produces in $row and $row['vote_count_sum'] will have the total.

Answer 2

SELECT SUM( vote_count ) AS vote_summary FROM votes