如何從數據庫獲取兩個字段的和

Question

$query = "SELECT agent_id, SUM(amount) FROM bill WHERE YEAR(date)  = YEAR(CURDATE()) AND MONTH(date) = MONTH(CURDATE()) GROUP BY agent_id"; 

$result = mysql_query($query) or die(mysql_error());

// Print out result
while($row = mysql_fetch_array($result)){
    echo "Total ". $row['agent_id']. " = $". $row['SUM(amount)'];
    echo "<br />";
}

DB結構圖：

我想知道如何將支票和金額的當前顯示為僅金額的工作

Answer 1

嘗試一下（我從您的問題中了解的內容）-

SELECT agent_id, (SUM(amount)+sum(cheque)) As total FROM bill WHERE YEAR(date)  = YEAR(CURDATE()) AND MONTH(date) = MONTH(CURDATE()) GROUP BY agent_id"; 

Answer 2

當然可以，您的查詢如下所示：

SELECT agent_id, SUM(amount + cheque) 
FROM bill 
WHERE YEAR(date) = YEAR(CURDATE()) 
AND MONTH(date) = MONTH(CURDATE()) 
GROUP BY agent_id

Answer 3

SELECT agent_id, (SUM(amount) + SUM(cheque)) AS total_amount
FROM bill WHERE YEAR(date)  = YEAR(CURDATE()) AND MONTH(date) = MONTH(CURDATE()) 
GROUP BY agent_id