Question

在这里遇到一些问题，我似乎无法弄明白。我有一个MS-SQL数据库查询的结果集，我需要将其导入MySQL数据库。不要问为什么，我必须这样做。下面是我的代码，但是当我运行它时，它对结果没有任何作用。任何人都可以帮助我吗？

      <?php

    putenv("TDSVER=80");
    putenv("FREETDSCONF=/etc/freetds/freetds.conf");
    putenv("ODBCSYSINI=/etc/odbcinst.ini");
    putenv("ODBCINI=/etc/odbc.ini");


    $myServer = "*****";
    $username = "*****";
    $password = "*****";
    $database = "*****";

    //connection to the database
    $dbhandle = mssql_connect($myServer, $username, $password)
    or die("Couldn't connect to SQL Server on $myServer");

    //select a database to work with
    $selected = mssql_select_db($database, $dbhandle)
    or die("Couldn't open database $myDB");

    $sql_connection = mysqli_connect("*****", "*****", "*****", "*****");
if (mysqli_connect_errno()) {
        echo "Failed to connect to the SQL Database: " . mysqli_connect_error();
    }

    $query = "DECLARE @Agent NVARCHAR(250) = '%*****%';
    WITH Agent AS
    (SELECT
        COUNT (r.id) as 'count',
        p.category_id AS 'category'
    FROM
        service_req r LEFT JOIN
        problem_type p on r.problem_type = p.problem_type
    WHERE
        r.problem_sub_type = p.problem_sub_type
        AND r.problem_type = p.problem_type
        AND r.responsibility LIKE @Agent
        AND r.insert_time BETWEEN '2017-06-01 01:00:00' AND '2018-06-01 01:00:00'
        AND p.category_id BETWEEN '491' AND '1050'
        AND r.status IN ('3', '32')
        AND r.escalation IN ('0', '1', '2')
        GROUP BY
            p.category_id,
            p.problem_sub_type), CatList AS
    (SELECT
        COUNT (r.id) as 'count',
        p.category_id AS 'category'
    FROM
        service_req r RIGHT JOIN
        problem_type p ON r.problem_type = p.problem_type
        GROUP BY p.category_id)

    SELECT
        COALESCE(a.COUNT, 0) as 'count'
        --cl.category
    FROM
        Agent AS A RIGHT JOIN
        CatList AS cl ON a.category = cl.category
    ";


    $result = mssql_query($query);
    $numRows = mssql_num_rows($result);
    //display the results
    while ($row = mssql_fetch_array($result)) {

        $query2 = "UPDATE performance_engine_sysaidstat_dino SET points_cat_count = ".($row['count']);
        $result1 = mysqli_query($sql_connection,$query2);




    }

    ?>

当我运行它的MSSQL部分而没有输入到浏览器时，我确实得到了结果，但是在尝试更新Mysql数据库时我错过了一些东西。

更新：

我在这里添加了以下代码行echo $row['count'] . "<br />";：

   while ($row = mssql_fetch_array($result)) {

        echo $row['count'] . "<br />";
        $query2 = "UPDATE performance_engine_sysaidstat_dino SET points_cat_count = ".($row['count']);
        $result1 = mysqli_query($sql_connection,$query2) or die(mysqli_error($sql_connection));
 }

当运行脚本时，我可以在浏览器中看到我的结果集，但没有数据被推送到MySQL数据库。

更新2：

我已经从这个

修复了我的语法问题

 $query2 = "UPDATE performance_engine_sysaidstat_dino SET points_cat_count = ".($row['count']);

对此：

 $query2 = "UPDATE performance_engine_sysaidstat_dino SET points_cat_count = '".($row['count'])."'";

但现在它仅使用结果集中的第一个值更新我的MySQL数据库。从MSSQL查询返回的数据是521行数据（不同的值），并且此数据集需要按原样更新到新数据库。

更新3：

这是MySQL表的表结构

id  points_cat_count    points_cat_id   points_cat_points   points_cat_total
1   0   491 0   0
2   0   492 3   0
3   0   493 0   0
4   0   494 1   0
5   0   495 1   0
6   0   496 1   0
7   0   497 3   0

Answer 1

只需向WHERE查询添加UPDATE子句，因为现在所有行都会随每个循环更新。具体来说，使用相关字段，即两个数据库表之间的类别ID。

另外，使用prepared statements来参数化查询。注意预备语句位于循环外部，并且循环中只有binded迭代：

$query2 = "UPDATE performance_engine_sysaidstat_dino
           SET points_cat_count = ? WHERE points_cat_id = ?";

while ($row = mssql_fetch_array($result)) {    
   echo $row['count'] . "<br />";

   $stmt = $mysqli->prepare(query2);
   // ASSUMES COUNT IS STR AND CATEGORY IS INT
   $stmt->bind_param('si', $row['count'], $row['category'])    
   $stmt->execute();

}

$stmt->close();
$mysqli->close();

将结果从MS-SQL查询更新到MySql数据库

1 个答案: