Question

我是新的php和sql我试图选择一个用户名并计算他的总列名并显示它。我有点混淆如何做到这一点。请帮帮我们。非常感谢你。

<?php
if( isset($_POST['query']) ){

$query = $_POST['query'];

$raw_results = mysql_query(
    "SELECT * 
     FROM inventory 
     WHERE 
       (`serialproductkey` LIKE '%".$query."%') OR 
       (`employeename` LIKE '%".$query."%')"
) or die(mysql_error());

if( mysql_num_rows($raw_results) > 0 ){

// and this code that i need to combine with the search part
$tae = "SELECT SUM(total) AS TotalItemsOrdered FROM inventory";

Answer 1

mysql_*函数已弃用。使用mysqli_*或pdo，read more
'%".$query."%'很危险......风险SQL_injection
性能提示：寻求限制对数据库的请求数

您问题的可能解决方案是

$raw_results = mysql_query(
    "SELECT employeename, SUM(total) AS TotalItemsOrdered
    FROM inventory
    WHERE 
        (serialproductkey LIKE '%".mysql_real_escape_string($query)."%') OR 
        (employeename LIKE '%".mysql_real_escape_string($query)."%')
    GROUP BY employeename"
) or die(mysql_error());

online demo

Answer 2

SELECT SUM(total) AS TotalItemsOrdered
FROM inventory
WHERE (`serialproductkey` LIKE '%".$query."%') OR
      (`employeename` LIKE '%".$query."%')

结合搜索和求和语句

2 个答案: