爲什麼結果集的count總是0？

Question

我試圖做我的查詢中重複計數，並返回現場，但它仍然返回0

// Get the total 
$query = "select count (distinct field_name) from table_name"; 

$rs = $conn->execute($query); 

$count = $rs->Fields(0)->value; 

echo $count; 

我不能叫上一個計數值場？

Answer 1

http://phplens.com/lens/adodb/docs-adodb.htm#fields

$query = "select count (distinct field_name) as cnt from table_name"; 
... 
$count = $rs->Fields[0]; 

or 
$count = $rs->Fields("cnt"); 

Answer 2

您可以使用mysql_num_rows獲得