MySQL: Resultset Randomly listed

Databases
1

HI

I have a simple table in my database called ‘avatars’


CREATE TABLE `avatars` (
  `avatar_id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
  `avatar_image_name` VARCHAR(255) DEFAULT NULL,
  PRIMARY KEY (`avatar_id`)
) ENGINE=MYISAM AUTO_INCREMENT=60 DEFAULT CHARSET=latin1

Which has some data in it.

When I run a simple select query:

SELECT *
FROM  `avatars`
LIMIT 0 , 30

What order does it follow to show the resultset? As u can see from the attached screenshot that the autoincrement id column is not in serial order.

Please explain this.

2

it’s really simple

without an ORDER BY clause, the database engine is allowed to return rows in whatever sequence it wishes

3

I know but what I want to know is that does it have any internal logic at all?

4

it returns them in the sequence it finds them

5

But logically should not it find the records in the sequence it was inserted?

Thanks.

6

no, because the insertion takes place on the most readily available disc space, which could be anywhere in the sequence

7

Thats strage!!

Where did you find this info sir? coz I was unble to see any such info in the official document :frowning:

8

you’re gonna have an even harder time finding anything that contradicts it

:smiley: