Update all mysql php

PHP mysqli code to update data

This article is created to describe the way to update or modify specific data using PHP mysqli script. These are the two approaches, that can be used to update any specific or all data in the database:

Whatever the approach we choose to update the data, we need to follow these simple steps:

• Open a connection to the database.
• Write an SQL statement regarding the data modification.
• Initialize the written SQL statement to a variable.
• Use this variable to perform the query against the database to modify particular data.
• Close the database connection.

The SQL statement to update specific data is:

UPDATE tableName SET column1=value1, column2=value2, column3=value3, . columnN=valueN WHERE particularColumn=particularValue;

Be careful when updating the data. The WHERE clause is used when we need to update particular records.

Be careful when omitting the WHERE clause; update all records in the table.

Update data using PHP mysqli Object-Oriented Script

Follow the example given below to update particular data (a record or row) using a PHP mysqli object-oriented script. In this example, I am going to update the age of a record whose id is 3.

connect_errno) < echo "Connection to the database failed!"; echo "Reason: ", $conn->connect_error; exit(); > $sql = "UPDATE customer SET age='40' WHERE $result = $conn->query($sql); if($result) < echo "Data updated successfully."; // block of code to process further. > else < echo "Error occurred while updating the record!"; echo "Reason: ", $conn->error; > $conn->close(); ?>

Before executing the above PHP script, here is a snapshot of the table customer:

Here is the output produced by the above PHP example on updating the record using a PHP mysqli object-oriented script:

And following is the snapshot of the table named «student» after executing the above PHP script:

Note: The mysqli() function is used to open a connection to the MySQL database server in object-oriented style.

Note: The new keyword is used to create a new object.

Note: The connect_errno is used to get or return the error code (if any) from the last connect call in object-oriented style.

Note: The connect_error is used to get the error description (if any) from the last connection in object-oriented style.

Note: The exit() function is used to terminate the execution of the current PHP script.

Note: The query() function is used to perform queries on the MySQL database in object-oriented style.

Note: The error is used to return the description of the error (if any) from the most recent function call in object-oriented style.

Note: The close() function is used to close an opened connection in object-oriented style.

Note: If you remove the WHERE clause from the above PHP script, then the age column of all rows will be set to 40.

The above example can also be written as:

connect_errno) < if($conn->query("UPDATE customer SET age='40' WHERE echo "Data updated successfully."; > $conn->close(); ?>

Update data using PHP mysqli procedural script

To update data using a PHP mysqli procedural script, follow the example given below:

"; echo "Reason: ", mysqli_error($conn); > > mysqli_close($conn); ?>

Note: The mysqli_connect() function is used to open a connection to the MySQL database server in procedural style.

Note: The mysqli_connect_errno() function is used to get or return the error code (if any) from the last connect call in procedural style.

Note: The mysqli_query() function is used to perform queries on the MySQL database in procedural style.

Note: The mysqli_error() function is used to return the description of the error (if any) from the most recent function call in procedural style.

Note: The mysqli_close() function is used to close an opened connection to the MySQL database in procedural style.

PHP mysqli Object-Oriented: Update Multiple Columns

To update multiple columns at once, everything will be the same as done in the section Update Data using PHP mysqli Object-Oriented Script, except the SQL statement. That is, to update two columns, say age and email, use the following SQL statement:

$sql = "UPDATE customer SET age='42', email='newmail@xyz.com' WHERE >And to update more columns, say three columns, use the following SQL statement:

$sql = "UPDATE customer SET name='Lucas', age='42', email='newmail@xyz.com' WHERE >Here is the complete PHP mysqli script to update multiple columns at once:

connect_errno) < $sql = "UPDATE customer SET name='Lucas', age='42', email='newmail@xyz.com' WHERE if($conn->query($sql)) echo "Data updated successfully."; else < echo "Error occurred while updating the record!"; echo "Reason: ", $conn->error; > > $conn->close(); ?>

PHP mysqli Procedural: Update Multiple Columns

"; echo "Reason: ", mysqli_error($conn); > > mysqli_close($conn); ?>

PHP mysqli: Update All Rows at Once

To update all rows using the PHP mysqli script, all the processes will be the same, except that you will remove or omit the WHERE clause. That is, to update all rows with particular columns, use this similar SQL statement:

$sql = "UPDATE customer SET email='newmail@xyz.com'";

And to update all rows with multiple columns, use this similar SQL statement:

$sql = "UPDATE customer SET name='Lucas', age='42', email='newmail@xyz.com'";

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PHP MySQL Update Data

The UPDATE statement is used to update existing records in a table:

Notice the WHERE clause in the UPDATE syntax: The WHERE clause specifies which record or records that should be updated. If you omit the WHERE clause, all records will be updated!

To learn more about SQL, please visit our SQL tutorial.

Let’s look at the «MyGuests» table:

id	firstname	lastname	email	reg_date
1	John	Doe	john@example.com	2014-10-22 14:26:15
2	Mary	Moe	mary@example.com	2014-10-23 10:22:30

The following examples update the record with in the «MyGuests» table:

Example (MySQLi Object-oriented)

$servername = «localhost»;
$username = «username»;
$password = «password»;
$dbname = «myDB»;

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) die(«Connection failed: » . $conn->connect_error);
>

$sql = «UPDATE MyGuests SET lastname=’Doe’ WHERE ($conn->query($sql) === TRUE) echo «Record updated successfully»;
> else echo «Error updating record: » . $conn->error;
>

Example (MySQLi Procedural)

$servername = «localhost»;
$username = «username»;
$password = «password»;
$dbname = «myDB»;

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) die(«Connection failed: » . mysqli_connect_error());
>

$sql = «UPDATE MyGuests SET lastname=’Doe’ WHERE (mysqli_query($conn, $sql)) echo «Record updated successfully»;
> else echo «Error updating record: » . mysqli_error($conn);
>

Example (PDO)

$servername = «localhost»;
$username = «username»;
$password = «password»;
$dbname = «myDBPDO»;

try $conn = new PDO(«mysql:host=$servername;dbname=$dbname», $username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$sql = «UPDATE MyGuests SET lastname=’Doe’ WHERE // Prepare statement
$stmt = $conn->prepare($sql);

// execute the query
$stmt->execute();

// echo a message to say the UPDATE succeeded
echo $stmt->rowCount() . » records UPDATED successfully»;
> catch(PDOException $e) echo $sql . «
» . $e->getMessage();
>

After the record is updated, the table will look like this:

id	firstname	lastname	email	reg_date
1	John	Doe	john@example.com	2014-10-22 14:26:15
2	Mary	Doe	mary@example.com	2014-10-23 10:22:30

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Обновление данных в базе данных MySQL

В этом уроке вы узнаете, как обновлять записи в таблице базы данных MySQL с помощью запросов SQL.

Обновление данных БД

При обновлении данных в таблице можно либо обновить определенные строки, либо обновить все строки в таблице. Эти задачи решаются с помощью оператора SQL UPDATE в сочетании с ключевыми словами SET и WHERE .

Базовый синтаксис оператора UPDATE может быть задан следующим образом:

Давайте создадим SQL-запрос, используя оператор UPDATE и условие WHERE , передав его функции PHP mysqli_query() для обновления записей таблиц. Рассмотрим следующую таблицу persons в базе данных demo:

Код PHP в следующем примере обновит адрес электронной почты человека в таблице persons, идентификатор которого равен 1:

Пример

 $sql = "UPDATE persons SET email='peterparker_new@mail.com' WHERE (mysqli_query($conn, $sql)) < echo "Запись успешно обновлена"; >else < echo "Ошибка обновления записи: " . mysqli_error($conn); >mysqli_close($conn); ?>

 $sql = "UPDATE persons SET email='peterparker_new@mail.com' WHERE ($conn->query($sql) === TRUE) < echo "Запись успешно обновлена"; >else < echo "Ошибка обновления записи: " . $conn->error; > $conn->close(); ?>

setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $sql = "UPDATE persons SET email='peterparker_new@mail.com' WHERE // Подготовить заявление $stmt = $conn->prepare($sql); // выполнить запрос $stmt->execute(); // echo-сообщение, чтобы сказать, что ОБНОВЛЕНИЕ выполнено успешно echo $stmt->rowCount() . " записи ОБНОВЛЕНЫ успешно"; > catch(PDOException $e) < echo $sql . "
" . $e->getMessage(); > $conn = null; ?>

После обновления таблица лиц будет выглядеть так:

Примечание: Обратите внимание на условие WHERE в синтаксисе UPDATE: условие WHERE указывает, какую запись или записи следует обновить. Если вы опустите условие WHERE, все записи будут обновлены!

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PHP MySQL UPDATE Query

In this tutorial you’ll learn how to update the records in a MySQL table using PHP.

Updating Database Table Data

The UPDATE statement is used to change or modify the existing records in a database table. This statement is typically used in conjugation with the WHERE clause to apply the changes to only those records that matches specific criteria.

The basic syntax of the UPDATE statement can be given with:

Let’s make a SQL query using the UPDATE statement and WHERE clause, after that we will execute this query through passing it to the PHP mysqli_query() function to update the tables records. Consider the following persons table inside the demo database:

+----+------------+-----------+----------------------+ | id | first_name | last_name | email | +----+------------+-----------+----------------------+ | 1 | Peter | Parker | peterparker@mail.com | | 2 | John | Rambo | johnrambo@mail.com | | 3 | Clark | Kent | clarkkent@mail.com | | 4 | John | Carter | johncarter@mail.com | | 5 | Harry | Potter | harrypotter@mail.com | +----+------------+-----------+----------------------+

The PHP code in the following example will update the email address of a person in the persons table whose id is equal to 1.

Example

 // Attempt update query execution $sql = "UPDATE persons SET email='peterparker_new@mail.com' WHERE $sql)) < echo "Records were updated successfully."; >else < echo "ERROR: Could not able to execute $sql. " . mysqli_error($link); >// Close connection mysqli_close($link); ?>

connect_error); > // Attempt update query execution $sql = "UPDATE persons SET email='peterparker_new@mail.com' WHERE === true) < echo "Records were updated successfully."; >else< echo "ERROR: Could not able to execute $sql. " . $mysqli->error; > // Close connection $mysqli->close(); ?>

setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); > catch(PDOException $e)< die("ERROR: Could not connect. " . $e->getMessage()); > // Attempt update query execution try< $sql = "UPDATE persons SET email='peterparker_new@mail.com' WHERE $pdo->exec($sql); echo "Records were updated successfully."; > catch(PDOException $e)< die("ERROR: Could not able to execute $sql. " . $e->getMessage()); > // Close connection unset($pdo); ?>

After update the persons table will look something like this:

+----+------------+-----------+--------------------------+ | id | first_name | last_name | email | +----+------------+-----------+--------------------------+ | 1 | Peter | Parker | peterparker_new@mail.com | | 2 | John | Rambo | johnrambo@mail.com | | 3 | Clark | Kent | clarkkent@mail.com | | 4 | John | Carter | johncarter@mail.com | | 5 | Harry | Potter | harrypotter@mail.com | +----+------------+-----------+--------------------------+

Warning: The WHERE clause in the UPDATE statement specifies which record or records should be updated. If you omit the WHERE clause, all records will be updated.

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