PHP MySQL Mise à jour
L'instruction UPDATE est utilisé pour modifier les données dans une table.
Jour des données dans une base de données
L'instruction UPDATE est utilisé pour mettre à jour des enregistrements existants dans une table.
Syntaxe
UPDATE table_name
SET column1=value, column2=value2,...
WHERE some_column=some_value
SET column1=value, column2=value2,...
WHERE some_column=some_value
Remarque: Notez que la clause WHERE dans la syntaxe UPDATE. La clause WHERE spécifie les dossiers ou documents qui doivent être mis à jour. Si vous omettez la clause WHERE, tous les enregistrements seront mis à jour!
Pour en savoir plus sur SQL, s'il vous plaît visitez notre tutoriel SQL .
Pour obtenir de PHP pour exécuter l'instruction ci-dessus, nous devons utiliser la fonction mysql_query () la fonction. Cette fonction est utilisée pour envoyer une requête ou une commande à une connexion MySQL.
Exemple
Plus tôt dans le tutoriel, nous avons créé une table nommée "personnes". Voici à quoi il ressemble:
Prénom | LastName | Âge |
---|---|---|
Peter | Griffon | 35 |
Glenn | Bourbier | 33 |
Les mises à jour suivantes, par exemple certaines données dans l'affaire «Personnes» table:
<?php
$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
mysql_query("UPDATE Persons SET Age=36
WHERE FirstName='Peter' AND LastName='Griffin'");
mysql_close($con);
?>
$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
mysql_query("UPDATE Persons SET Age=36
WHERE FirstName='Peter' AND LastName='Griffin'");
mysql_close($con);
?>
Après la mise à jour, l'affaire «personne» de table ressemblera à ceci:
Prénom | LastName | Âge |
---|---|---|
Peter | Griffon | 36 |
Glenn | Bourbier | 33 |
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