Question

I’m currently trying to create a mySQL database that holds hashes such as MD5 hashes. I’m using PHPmyAdmin version 3.3.9, and MySQL client version: 4.1.22

I already created a database named hashes. I’m new to mySQL so how can I add a table with data for a hash?

Answer 1

Hash column should be a CHAR(32) as that is the length of the hash:

CREATE TABLE `hashes` (
    `id` INT NOT NULL AUTO_INCREMENT, 
    `hash` CHAR(32), 
    PRIMARY KEY (`id`)
);

mysql> describe hashes;
+-------+----------+------+-----+---------+----------------+
| Field | Type     | Null | Key | Default | Extra          |
+-------+----------+------+-----+---------+----------------+
| id    | int(11)  | NO   | PRI | NULL    | auto_increment |
| hash  | char(32) | YES  |     | NULL    |                |
+-------+----------+------+-----+---------+----------------+

If you want to select from the table given user input:

-- Insert sample data:
mysql> INSERT INTO `hashes` VALUES (null, MD5('hello'));
Query OK, 1 row affected (0.00 sec)

-- Test retrieval:
mysql> SELECT * FROM `hashes` WHERE `hash` = MD5('hello');
+----+----------------------------------+
| id | hash                             |
+----+----------------------------------+
|  1 | 5d41402abc4b2a76b9719d911017c592 |
+----+----------------------------------+
1 row in set (0.00 sec)

You can add a key on hash for better performance.