The DELETE statement is used to delete records in a table.
Delete Data In a Database
The DELETE FROM statement is used to delete records from a database table.
Syntax
| DELETE FROM table_nameWHERE some_column = some_value |
Note: Notice the WHERE clause in the DELETE syntax. The WHERE clause specifies which record or records that should be deleted. If you omit the WHERE clause, all records will be deleted!
To get PHP to execute the statement above we must use the mysql_query() function. This function is used to send a query or command to a MySQL connection.
Example
Look at the following “Persons” table:
| FirstName | LastName | Age |
| Peter | Griffin | 35 |
| Glenn | Quagmire | 33 |
The following example deletes all the records in the “Persons” table where LastName=’Griffin’:
| <?php $con = mysql_connect(“localhost”,”peter”,”abc123″); if (!$con) { die(‘Could not connect: ‘ . mysql_error()); } mysql_select_db(“my_db”, $con); mysql_query(“DELETE FROM Persons WHERE LastName=’Griffin'”); mysql_close($con); ?> |
After the deletion, the table will look like this:
| FirstName | LastName | Age |
| Glenn | Quagmire | 33 |