php mysql查询动态按值分组

Question

您好我有一个mysql查询，我希望按值按不同顺序获取结果。

这是代码。

$strQuery =
"SELECT
    category.short_description AS category,
    asset.asset_code AS code,
    asset_model_number.short_description AS model,
    asset_custom_field_helper.cfv_1 AS mnfserial,
    asset_custom_field_helper.cfv_6 AS proctype,
    asset_custom_field_helper.cfv_7 AS hdd,
    asset_custom_field_helper.cfv_8 AS type,
    asset_custom_field_helper.cfv_9 AS cond,
    asset_custom_field_helper.cfv_10 AS drive,
    asset_custom_field_helper.cfv_12 AS os,
    asset_custom_field_helper.cfv_13 AS cpu,
    asset_custom_field_helper.cfv_14 AS ram,
    COUNT(*) AS total
FROM
    asset_transaction
LEFT JOIN asset 
  ON asset_transaction.asset_id = asset.asset_id
LEFT JOIN asset_model 
  ON asset.asset_model_id = asset_model.asset_model_id
LEFT JOIN asset_model_number 
  ON asset.asset_model_number_id = asset_model_number.asset_model_number_id
LEFT JOIN asset_custom_field_helper 
  ON asset.asset_id = asset_custom_field_helper.asset_id
LEFT JOIN user_account 
  ON asset.created_by = user_account.user_account_id
LEFT JOIN category 
  ON asset_model.category_id = category.category_id
WHERE asset_transaction.transaction_id = ($txnid)
GROUP BY model";

$objDatabase = QApplication::$Database[1];

// Perform the Query
$objDbResult = $objDatabase->Query($strQuery);

本节我想按模型分组结果

echo "<h3>Total Model No<br></h3><strong>";
while ($mixRow = $objDbResult->FetchArray()) {
echo $mixRow['model']. " = " .$mixRow['total'];
echo "<br><strong>";
}

在下面的部分中，我希望按类型

显示结果组

echo "<h3>Total Products<br></h3><strong>";
echo "<br>";
while ($row = $objDbResult->FetchArray()) {
echo $row['type']. " = " .$row['total'];
echo "<br><strong>";

我想避免每次编写sql查询，而是想使用此查询并在某处按值定义我的订单。我怎么能这样做？

Answer 1

我希望这可以帮助你：）

function getQuery( $order_by_string )
{ 
  return $query = 'Your query ....  ORDER BY '.$order_by_string
}

$query = getQuery("something");

Answer 2

您应该考虑创建一个查询构建器类，以便更自由地创建查询。

无论如何，只需设置组，您就可以创建函数getQueryGroupBy($query,$type)，如下所示：

function getQueryGroupBy($query, $type) {
    return $query . 'GROUP BY ' . $type;
}

您的查询将是：

$strQuery = "SELECT
    category.short_description AS category,
    asset.asset_code AS code,
    asset_model_number.short_description AS model,
    asset_custom_field_helper.cfv_1 AS mnfserial,
    asset_custom_field_helper.cfv_6 AS proctype,
    asset_custom_field_helper.cfv_7 AS hdd,
    asset_custom_field_helper.cfv_8 AS type,
    asset_custom_field_helper.cfv_9 AS cond,
    asset_custom_field_helper.cfv_10 AS drive,
    asset_custom_field_helper.cfv_12 AS os,
    asset_custom_field_helper.cfv_13 AS cpu,
    asset_custom_field_helper.cfv_14 AS ram,
    COUNT(*) AS total
FROM
    asset_transaction
    LEFT JOIN asset 
      ON asset_transaction.asset_id = asset.asset_id
    LEFT JOIN asset_model 
      ON asset.asset_model_id = asset_model.asset_model_id
    LEFT JOIN asset_model_number 
      ON asset.asset_model_number_id = asset_model_number.asset_model_number_id
    LEFT JOIN asset_custom_field_helper 
      ON asset.asset_id = asset_custom_field_helper.asset_id
    LEFT JOIN user_account 
      ON asset.created_by = user_account.user_account_id
    LEFT JOIN category 
      ON asset_model.category_id = category.category_id
WHERE
    asset_transaction.transaction_id = ($txnid)";

然后您将调用此函数：

$query = $this->setGroupBy($strQuery, 'model');

或

$query = $this->setGroupBy($strQuery, 'type');

修改

所以你可能最终得到这个：

$baseQuery =
"SELECT
    category.short_description AS category,
    asset.asset_code AS code,
    asset_model_number.short_description AS model,
    asset_custom_field_helper.cfv_1 AS mnfserial,
    asset_custom_field_helper.cfv_6 AS proctype,
    asset_custom_field_helper.cfv_7 AS hdd,
    asset_custom_field_helper.cfv_8 AS type,
    asset_custom_field_helper.cfv_9 AS cond,
    asset_custom_field_helper.cfv_10 AS drive,
    asset_custom_field_helper.cfv_12 AS os,
    asset_custom_field_helper.cfv_13 AS cpu,
    asset_custom_field_helper.cfv_14 AS ram,
    COUNT(*) AS total
FROM
    asset_transaction
LEFT JOIN asset 
  ON asset_transaction.asset_id = asset.asset_id
LEFT JOIN asset_model 
  ON asset.asset_model_id = asset_model.asset_model_id
LEFT JOIN asset_model_number 
  ON asset.asset_model_number_id = asset_model_number.asset_model_number_id
LEFT JOIN asset_custom_field_helper 
  ON asset.asset_id = asset_custom_field_helper.asset_id
LEFT JOIN user_account 
  ON asset.created_by = user_account.user_account_id
LEFT JOIN category 
  ON asset_model.category_id = category.category_id
WHERE asset_transaction.transaction_id = ($txnid)";

$objDatabase = QApplication::$Database[1];

// Create the query
$modelQuery = getQueryGroupBy($baseQuery, 'model'); 
// Perform the Query
$objDbResultByModel = $objDatabase->Query($modelQuery);
echo "<h3>Total Model No<br></h3><strong>";
while ($mixRow = $objDbResultByModel->FetchArray()) {
    echo $mixRow['model']. " = " .$mixRow['total'];
    echo "<br><strong>";
}

// Create the query
$typeQuery = getQueryGroupBy($baseQuery, 'type'); 
// Perform the Query
$objDbResultByType = $objDatabase->Query($typeQuery);
echo "<h3>Total Products<br></h3><strong>";
echo "<br>";
while ($row = $objDbResultByType->FetchArray()) {
    echo $row['type']. " = " .$row['total'];
    echo "<br><strong>";
}

function getQueryGroupBy($query, $type) {
    return $query . ' GROUP BY ' . $type;
}