sql delete row

 DELETE FROM table_name WHERE condition;
 

 DELETE FROM Customers
 WHERE CustomerName='Alfreds Futterkiste';
 

DELETE FROM table_name WHERE condition;

DELETE FROM table_name;

 DELETE FROM table_name WHERE condition;

-- Deletes all records where `columnName` matches the values in brackets.
DELETE FROM tableName WHERE columnName IN ('val1', 'val2', 'val3');

UPDATE TableName SET ColumnName = NULL

public function deletedata(){	

	$this->db->where('id', 2);	
	$this->db->delete('table_name');

	}