php - 在mysql php中计算和添加列值

Question

我有下表

AffID    l      Commision
-------------------------
MW001              5

MW004              10

MW001              25

MW001              5

MW004              5

我想提交一个计算列中金额的查询。例如，我正在寻找的输出是:

MW001 - 35

我现在使用的查询无法正常工作，它计算实际的记录数量。

$sql = "SELECT COUNT(*) as c FROM toutcome WHERE affID = '" . $_SESSION['affID'] . "'";
$result = mysql_query($sql);
$row = mysql_fetch_array($result);
echo  $row['c'] ;

Answer 1

尝试这个查询

select sum(Commission) from toutcome where affID = 'MW001'

所以你的查询应该是

$sql = "SELECT SUM(Commission) as c FROM toutcome WHERE affID = '" . $_SESSION['affID'] . "'";