php - 覆盖postgresql表php中的数据

Question

postgresql 表中的数据不再更新。我想覆盖数据。当我只使用 insert into 时，添加了新数据，但保留了旧数据。我尝试使用更新，但后来出现错误。我想更新所有记录。我认为这可能与语法有关。但我找不到问题所在。

代码

$dbname = "dbtest";
$host = "localhost";
$username = "postgres";
$password = "pasword";

$dbh = new PDO("pgsql:dbname=$dbname; host=$host", $username, $password);

$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$c = array("Human","Mouse","Rat","Hamster","SV40");       
$b = array("Human HBO gene", "Mouse BB gene", "Human CCB gene", "SV40 TP gene", "Hamster TP53 gene");
$count=0;
foreach($c as $key => $d){
    $e =$b[$key];
    $name = $count++;
    if (strpos($e, $d) !== FALSE) {
        $match = $d;
        $specie = $d;
        $specie = str_replace("Human","Homo Sapiens",$specie);
        $specie = str_replace("Mouse","Mus Musculus",$specie);
        $specie = str_replace("Rat","Rattus norvegicus",$specie);
        $Specie = str_replace("Hamster", "Mesocricetus Auratus",$specie);
        $specie = str_replace("SV40","Simian virus 40",$specie);
    }else{
        $match = "0";
        $specie = "0";
    }

echo $match. " ". $specie. " ";

$var_id = $name;
$var_match = $match;
$var_full_name = $specie;


    #$sql = "INSERT INTO species (id,match,full_name) VALUES ('".$var_id."','".$var_match ."','".$var_full_name."')";
    $sql = "UPDATE species SET id = '".$var_id."', match = '".$var_match ."', full_name='".$var_full_name."'";
    if ($dbh->query($sql)) {
        echo "New Record Inserted Successfully!<br \>\n";
    }else{
        echo "Data not successfully Inserted.<br \>\n";
    } 
}

我得到的错误:

Fatal error: Uncaught PDOException: SQLSTATE[42601]: Syntax error: 7 ERROR: > syntax error at or near "Sapiens" LINE 1: ...species SET id = '0', match = Human, full_name=Homo Sapiens' ^ in /var/www/html/test/Insert.php:59 Stack trace: #0 /var/www/html/test/Insert.php(59): PDO->query('UPDATE species ...') #1 {main} thrown in /var/www/html/test/Insert.php on line 59

Answer 1

您应该使用选择查询来确定值是新值还是旧值。如果旧更新数据，则插入数据。

功能

function execute_query($query,$dbh){
    if ($dbh->query($query)) {
        return "New Record Inserted Successfully!<br \>\n";
    }else{
        return "Data not successfully Inserted.<br \>\n";
    } 
}

选择

$query = 'SELECT * FROM tbl '. 'WHERE "test1" = '. 
        "'".$var_test."'" . 'AND "test2" = '. 
        "'".$var_test2."'";
        $stmt = $dbh->prepare($query);
        $stmt->execute();
        $result = $stmt->setFetchMode(PDO::FETCH_ASSOC);

        $outcome = $stmt->fetch();

更新

        if ($outcome !== false){
            $sql = "UPDATE tbl SET test1 = '".$var_test1."', test2 = '".$var_test2."', 
            test3 = '".$var_test3."'
            "WHERE id = '".$var_id."' ";
            execute_query($sql,$dbh);

插入

    }else{    
        $sql = "INSERT INTO genes 
        (id,test1,test2,test3) 
        VALUES ('".$var_id."','".$var_test1 ."','".$var_test2."','".$var_test3."')";
        execute_query($sql,$dbh);
    }