Question

我的UPDATE查询正在更新jobResponsibilities中的table_2字段，只需插入jobResponsibilities = c00017，但我想插入所有值，例如jobResponsibilities = C00001,C00302,C00303,C00287,C00286,C00285,C00017，而不仅仅是obResponsibilities = C00017 }} 在一个记录中。

我的代码如下：

function mySQLSafe( $value,  $quote = "'"){

    // strip quotes if already in
    $value = get_magic_quotes_gpc() ? stripslashes($value) : $value;
    $value = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($value) : mysql_escape_string($value);

    // Stripslashes
    if (get_magic_quotes_gpc()){
        $value = stripslashes($value);
    }

    // Quote value
    if (version_compare(phpversion(), "4.3.0") == "-1") {
        $value = mysql_escape_string($value);
    } else{
        $value = mysql_real_escape_string($value);
    }

    $value = $quote . $value . $quote;
    return $value;
}


$comcode = "SELECT  jobCode, compCode 
FROM first_table";

$comcode_RS = mysql_query($comcode, $timespace) or die (mysql_error());

while($row_comcode_RS = mysql_fetch_assoc($comcode_RS))
{
    $jobCode = $row_comcode_RS['jobCode']; // more than one record
    $compCode = $row_comcode_RS['compCode'];  // more than one record

    echo $updateSQL = "UPDATE second_table  SET jobResponsibilities=".mySQLSafe($compCode)."  WHERE jobCode=".mySQLSafe($jobCode).""; 
    $Result1 = mysql_query($updateSQL, $timespace) or die(mysql_error());
}

Answer 1

使用CONCAT将新值附加到列的末尾。

$updateSQL = "UPDATE second_table
              SET jobResponsibilities = IF(jobResponsibilities = '', " .
                                           mSQLSafe($compCode) . ",
                                           CONCAT(jobResponsibilities, ',', " . mSQLSafe($compCode) . "))
              WHERE jobCode=".mySQLSafe($jobCode);

然而，这是糟糕的架构设计。具有逗号分隔列表的列使许多数据库操作变得困难。您应该使用单独的表来处理工作职责，并为jobCode和compCode的每个组合使用行。

根据最后一条记录获取多条记录更新查询更新表

1 个答案: