![]() Now, you have selected the TUTORIALS database and all the subsequent operations will be performed on the TUTORIALS database. Here is an example to select a database called TUTORIALS mysql -u root -p You can use the SQL command use to select a database. ![]() It is very simple to select a database from the mysql> prompt. Selecting MySQL Database from the Command Prompt This is because there might be more than one database available with the MySQL Server. ![]() If the SQL statement has multiple placeholders, it is easier pass the arguments to the execute() method.Once you get connected with the MySQL server, it is required to select a database to work with.The advantages of using the named placeholder are: PHP provides you with another way to use placeholders in the prepared statement called named placeholder. Finally, we fetch each row of the result set and display the last name field.After that, we set the fetch mode for the PDOStatement object.WHERE lastname LIKE '%son' Code language: SQL (Structured Query Language) ( sql ) By doing this, the SELECT statement will be translated as follows: In addition, we pass an argument as an array to replace the placeholder in the SELECT statement. Then, we execute the statement by calling the execute() method of the PDOStatement object.Next, we call the prepare() method of the PDO object to prepare the SQL statement for the execution.The question mark is called positional placeholder. PDO will replace the question mark in the query by the corresponding argument. First, we use a question mark (?) in the SELECT statement.Let’s take a look at the following example: prepare($sql) ĭie( "Could not connect to the database $dbname :". To do it securely and avoid SQL injection attack, you need to use the PDO prepared statement. In practice, we often pass the argument from PHP to the SQL statement e.g., get the employee whose last name ends with son. ?> PHP MySQL Query Data Demo Employees First Name Last Name Job Title fetch()): ?> Code language: HTML, XML ( xml ) PHP MySQL Querying data using PDO prepared statement $q->setFetchMode(PDO::FETCH_ASSOC) Code language: PHP ( php )Īfter that, fetch each row from the result set until there is no row left by using the fetch() method of the PDOStatement object.ĭie( "Could not connect to the database $dbname :". The PDO::FETCH_ASSOC mode instructs the fetch() method to return a result set as an array indexed by column name. Next, set the PDO::FETCH_ASSOC fetch mode for the PDOStatement object by using the setFetchMode() method. The query() method of the PDO object returns a PDOStatement object, or false on failure. $q = $pdo->query($sql) Code language: PHP ( php ) $sql = 'SELECT lastname, firstname, jobtitle Then, construct a SELECT statement and execute it by using the query() method of the PDO object. $pdo = new PDO( "mysql:host=$host dbname=$dbname", $username, $password) Code language: PHP ( php ) Check it out the connecting to MySQL database using PDO tutorial for detail information. ![]() To query data from the MySQL database, follow the steps below:įirst, connect to a MySQL database. PHP MySQL Querying data using simple SELECT statement You will also learn how to use PDO prepared statement to select data securely. Summary : in this tutorial, you will learn how to query data from MySQL database by using PHP PDO. ![]()
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