How to use WHERE clause in MySQL
PHP uses mysqli query() or mysql_query() function to select records in a MySQL table using where clause. 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 select records in a MySQL table using Where Clause. |
| 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. |
Example
Try the following example to select a record using where clause in a table −
Copy and paste the following example as mysql_example.php −
Using Where Clause
connect_errno ) { printf("Connect failed: %s
", $mysqli->connect_error); exit(); } printf('Connected successfully.
'); $sql = 'SELECT tutorial_id, tutorial_title, tutorial_author, submission_date FROM tutorials_tbl where tutorial_author = "Mahesh"'; $result = $mysqli->query($sql); if ($result->num_rows > 0) { while($row = $result->fetch_assoc()) { printf("Id: %s, Title: %s, Author: %s, Date: %d
", $row["tutorial_id"], $row["tutorial_title"], $row["tutorial_author"], $row["submission_date"]); } } else { printf('No record found.
'); } mysqli_free_result($result); $mysqli->close(); ?>
Output
Access 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. 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
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