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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 = ''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 />'');
$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
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