postgresql php中的新旧值

Question

我有一个包含大量数据的表格。在此表中，我想添加新值并更新旧值。因此，我发现了以下方法

在根据响应调整查询后，我仍然遇到错误。

Fatal error: Uncaught PDOException: SQLSTATE[42702]: Ambiguous column: 7 
ERROR: column reference "id" is ambiguous LINE 3: ...richia coli',full_name = 
'Escherichia coli' WHERE id = '0' ^ in /var/www/html/Insert.php:127 Stack 
trace: #0 /var/www/html/Insert.php(127): PDO->query('INSERT INTO spe...') #1 
{main} thrown in /var/www/html/Insert.php on line 127

改编的查询是：

$sql = "INSERT INTO species (id,match,full_name)
VALUES ('".$var_id."','".$var_match ."','".$var_full_name."')".
"ON CONFLICT (id) DO UPDATE 
SET match = '".$var_match."',full_name = '".$var_full_name."' ". 
" WHERE id = '".$var_id."' ";

出于某种原因，它似乎仍然无法识别ON CONFLICT（id）DO UPDATE SET。见图 有人能告诉我，我弄错了吗？提前致谢。

Answer 1

EXCLUDED.'".$var_match."'会变成EXCLUDED.'Escherichia coli'，而'Escherichia coli'肯定不是一列。

使用

$sql = "INSERT INTO species (id,match,full_name)
VALUES ('".$var_id."','".$var_match ."','".$var_full_name."')".
"ON CONFLICT (id) DO UPDATE 
SET match = '".$var_match."',full_name = '".$var_full_name."' ";

或

$sql = "INSERT INTO species (id,match,full_name)
VALUES ('".$var_id."','".$var_match ."','".$var_full_name."')".
"ON CONFLICT (id) DO UPDATE 
SET match = EXCLUDED.match,full_name = EXCLUDED.full_name ";

您可能还错过WHERE id = '".$var_id."'的{​​{1}}或WHERE id = EXCLUDED.id。

Answer 2

这是我找到的解决方案。我把查询拆分成了因为ON CONFLICT对我不起作用。首先，我使用select通过检查id是否存在来确定行是否已存在。如果存在id，则更新数据。如果该想法不存在，则添加新行。

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";
    } 
} 

选择并准备声明

$query = 'SELECT * FROM species '. 'WHERE id = '. "'".$var_id."'";

$stmt = $dbh->prepare($query);
$stmt->execute();
$result = $stmt->setFetchMode(PDO::FETCH_ASSOC);
$out = $stmt->fetch();
print_r($out) ;

如果result =＆gt;更新行

if ($out !== false){
    $sql = "UPDATE species SET id = '".$var_id."', match ='".$var_match."',full_name = '".$var_full_name."'
    WHERE id = '".$var_id."' ";
    echo $sql ."<br \>\n";;
    execute_query($sql,$dbh); # function
    echo "Value is updated";

}else{ ### If no result => insert new values
    $sql = "INSERT INTO species (id,match,full_name)VALUES 
    ('".$var_id."','".$var_match ."','".$var_full_name."')";
    execute_query($sql,$dbh);
    echo "New value is inserted";