从选择查询向MySQL插入值

Question

我有一个php结果页面，该页面从提交的php表单获取值，例如

$sales = mysqli_real_escape_string($link, (int)$_POST['sales']);

我有一个插入查询

$sql = "INSERT INTO daily (date, sales) VALUES (CURRENT_TIMESTAMP, '$sales')";
if(mysqli_query($link, $sql)){
    "Records added successfully.";
} else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

现在我想向数据库添加一个额外的字段，它将基于新的选择查询

$query = "SELECT SUM(sales) FROM daily WHERE date BETWEEN '2017-01-01' AND '2017-01-31'";

我试图添加它以插入sql而没有结果

$sql = "INSERT INTO daily (date, sales, total_sales) VALUES (CURRENT_TIMESTAMP, '$sales', '$query')";
if(mysqli_query($link, $sql)){
    "Records added successfully.";
} else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

Answer 1

您可以使用插入/选择

$sql = "INSERT INTO daily (date, sales, total_sales) 
        SELECT 
            CURRENT_TIMESTAMP,
             '$sales',
            SUM(sales) 
       FROM daily 
       WHERE date BETWEEN '2017-01-01' AND '2017-01-31'";

在两步中，您可以执行查询，获取值并分配给insert ...例如：

$query = "SELECT SUM(sales) as tot FROM daily WHERE date BETWEEN '2017-01-01' AND '2017-01-31'";
mysqli_query($link, $query) ; 
$row = mysql_fetch_array($result, MYSQL_NUM);
$myTotal  = $row[0]
$sql = "INSERT INTO daily (date, sales, total_sales) VALUES (CURRENT_TIMESTAMP, '$sales', '$myTotal')";

Answer 2

您应该首先运行该查询，将结果保存在数组中，在数组中循环，然后将结果添加到数据库的正确字段中。

您现在要做的是将查询文本添加到daily表格的total_sales列中。

您可以参考以下答案来激发自己的灵感： 在PHP中获取MySQL列的总和

此外， 该页面还很好地解释了您必须执行的操作，向下滚动直到出现标题为“在具有group by的另一个表中插入查询结果”的示例。

Answer 3

尝试这种方式：

$sales = mysqli_real_escape_string($link, (int)$_POST['sales']);
$query = "SELECT SUM(sales) FROM daily WHERE date BETWEEN '2017-01-01' AND '2017-01-31'"

$sql = "INSERT INTO `daily` SET `date` = CURRENT_TIMESTAMP, `sales` = ' ".$sales." ', `total_sales` = ($query)";
if(mysqli_query($link, $sql)){
    "Records added successfully.";
} else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

Answer 4

起作用的代码很简单：

$result= mysqli_query($link, "SELECT SUM(sales) as valuesum FROM daily);
$row = mysqli_fetch_assoc($result); 
$total_sales = $row['valuesum'];

我无法管理它，因为我从phpfpm-error.log中发现了其他错误