Update Data In a MySQL Table Using MySQLi and PDOThe UPDATE statement is used to update existing records in a table: Show
UPDATE table_name 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:
The following examples update the record with id=2 in the "MyGuests" table: Example (MySQLi Object-oriented)<?php // Create connection $sql = "UPDATE MyGuests SET lastname='Doe' WHERE id=2"; if ($conn->query($sql) === TRUE) { $conn->close(); Example (MySQLi Procedural)<?php // Create connection $sql = "UPDATE MyGuests SET lastname='Doe' WHERE id=2"; if (mysqli_query($conn, $sql)) { mysqli_close($conn); Example (PDO)<?php try { $sql = "UPDATE MyGuests SET lastname='Doe' WHERE id=2"; // Prepare statement // execute the query // echo a message to say the UPDATE succeeded $conn = null; After the record is updated, the table will look like this:
There may be a requirement where the existing data in a MySQL table needs to be modified. You can do so by using the SQL UPDATE command. This will modify any field value of any MySQL table. SyntaxThe following code block has a generic SQL syntax of the UPDATE command to modify the data in the MySQL table − UPDATE table_name SET field1 = new-value1, field2 = new-value2 [WHERE Clause]
The WHERE clause is very useful when you want to update the selected rows in a table. Updating Data from the Command PromptThis will use the SQL UPDATE command with the WHERE clause to update the selected data in the MySQL table tutorials_tbl. ExampleThe following example will update the tutorial_title field for a record having the tutorial_id as 3. root@host# mysql -u root -p password; Enter password:******* mysql> use TUTORIALS; Database changed mysql> UPDATE tutorials_tbl -> SET tutorial_title = 'Learning JAVA' -> WHERE tutorial_id = 3; Query OK, 1 row affected (0.04 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> Updating Data Using a PHP ScriptPHP uses mysqli query() or mysql_query() function to update records in a MySQL table. This function takes two parameters and returns TRUE on success or FALSE on failure. Syntax$mysqli->query($sql,$resultmode)
ExampleTry the following example to update a record in a table − Copy and paste the following example as mysql_example.php − <html> <head> <title>Updating MySQL Table</title> </head> <body> <?php $dbhost = 'localhost'; $dbuser = 'root'; $dbpass = 'root@123'; $dbname = 'TUTORIALS'; $mysqli = new mysqli($dbhost, $dbuser, $dbpass, $dbname); if($mysqli->connect_errno ) { printf("Connect failed: %s<br />", $mysqli->connect_error); exit(); } printf('Connected successfully.<br />'); if ($mysqli->query('UPDATE tutorials_tbl set tutorial_title = "Learning Java" where tutorial_id = 4')) { printf("Table tutorials_tbl updated successfully.<br />"); } if ($mysqli->errno) { printf("Could not update table: %s<br />", $mysqli->error); } $sql = "SELECT tutorial_id, tutorial_title, tutorial_author, submission_date FROM tutorials_tbl"; $result = $mysqli->query($sql); if ($result->num_rows > 0) { while($row = $result->fetch_assoc()) { printf("Id: %s, Title: %s, Author: %s, Date: %d <br />", $row["tutorial_id"], $row["tutorial_title"], $row["tutorial_author"], $row["submission_date"]); } } else { printf('No record found.<br />'); } mysqli_free_result($result); $mysqli->close(); ?> </body> </html> OutputAccess the mysql_example.php deployed on apache web server and verify the output. Here we've entered multiple records in the table before running the select script. Connected successfully. Table tutorials_tbl updated successfully. Id: 1, Title: MySQL Tutorial, Author: Mahesh, Date: 2021 Id: 2, Title: HTML Tutorial, Author: Mahesh, Date: 2021 Id: 3, Title: PHP Tutorial, Author: Mahesh, Date: 2021 Id: 4, Title: Learning Java, Author: Mahesh, Date: 2021 Id: 5, Title: Apache Tutorial, Author: Suresh, Date: 2021 How do you edit data in a database?In the DB Browser, right-click a table, and select Edit Data. ... . Type a filter for the rows, if desired, in the Write your where condition field. ... . Select the cell you want to edit, and type a new value. ... . Press Enter to save your changes to the database, or Esc to cancel the edit operation.. Which editor is best for MySQL?Top 5 MySQL GUIs in 2021. mySQL Workbench. MySQL Workbench is a unified visual tool for database architects, developers, and DBAs. ... . dbForge. The dbForge GUI is the best option when it comes to IDE for MySQL. ... . dBeaver. ... . PHPMyAdmin. ... . HeidiSQL. ... . DronaHQ.. How do I edit a database in MySQL Workbench?But, It is disabled in MySQL workbench.. shut down the MySQL server.. go to the mysql data directory and rename the database directory (Note: non-alpha characters need to be encoded in a special way). restart the server.. adjust privileges if needed (grant access to the new DB name). |