Using JOin Example
PHP uses mysqli query() or mysql_query() function to get records from a MySQL tables using Joins. This function takes two parameters and returns TRUE on success or FALSE on failure.
Syntax
$mysqli->query($sql,$resultmode)
| Sr.No. | Parameter & Description |
|---|---|
| 1 | $sql Required – SQL query to get records from multiple tables using Join. |
| 2 | $resultmode Optional – Either the constant MYSQLI_USE_RESULT or MYSQLI_STORE_RESULT depending on the desired behavior. By default, MYSQLI_STORE_RESULT is used. |
First create a table in MySQL using following script and insert two records.
create table tcount_tbl( tutorial_author VARCHAR(40) NOT NULL, tutorial_count int ); insert into tcount_tbl values('Mahesh', 3); insert into tcount_tbl values('Suresh', 1);
Example
Try the following example to get records from a two tables using Join. −
Copy and paste the following example as mysql_example.php −
<html> <head> <title>Using joins on MySQL Tables</title> </head> <body> <?php $dbhost = 'localhost'; $dbuser = 'root'; $dbpass = '[email protected]'; $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 />'); $sql = 'SELECT a.tutorial_id, a.tutorial_author, b.tutorial_count FROM tutorials_tbl a, tcount_tbl b WHERE a.tutorial_author = b.tutorial_author'; $result = $mysqli->query($sql); if ($result->num_rows > 0) { while($row = $result->fetch_assoc()) { printf("Id: %s, Author: %s, Count: %d <br />", $row["tutorial_id"], $row["tutorial_author"], $row["tutorial_count"]); } } else { printf('No record found.<br />'); } mysqli_free_result($result); $mysqli->close(); ?> </body> </html>
Output
Access the mysql_example.php deployed on apache web server and verify the output.
Connected successfully. Id: 1, Author: Mahesh, Count: 3 Id: 2, Author: Mahesh, Count: 3 Id: 3, Author: Mahesh, Count: 3 Id: 5, Author: Suresh, Count: 1
