Mysql join acting weird - mysql

Question

I have a very simple query but I am a beginner at this and I couldn't understand really what the problem is as it's not working properly in second case:
SELECT a.user_name, a.password, a.id, r.role_name
FROM accounts as a
JOIN roles as r ON a.role=r.id
SELECT accounts.user_name, accounts.password, accounts.id, roles.role_name
FROM accounts
JOIN roles ON accounts.role=roles.id
SELECT *
FROM accounts as a
JOIN roles as r ON a.role=r.id
accounts.role and roles.id linked with foreign key. I try to select everything using * in the third query but it didn't even get anything from second table only got everything from first table(as in the last photo). So what might be the problem ?

Answer 1

This behaviour has no sense, all fields must to appear when you use *
Let's do a test on SQL Fiddle
MySQL 5.6 Schema Setup:
create table t1 ( i int, a char);
insert into t1 values (1,'a');
create table t2 ( i int, b char);
insert into t2 values (1,'a');
Query 1:
select *
from t1 inner join t2 on t1.i = t2.i
Results:
| i | a | i | b |
|---|---|---|---|
| 1 | a | 1 | a |
Query 2:
select *
from t1 x inner join t2 y on x.i = y.i
Results:
| i | a | i | b |
|---|---|---|---|
| 1 | a | 1 | a |
You can see all times all fields appear. May be is a issue with the program you use to connect and make the queries. Check for twice you are executing all the sentence, not only the firsts 2 lines, also check if they are a scroll bar to see more data.

Answer 2

I've restarted the database with given codes:
$mysqli->query('
CREATE TABLE `crm`.`roles`
(
`id` TINYINT(1) NOT NULL AUTO_INCREMENT,
`role_name` VARCHAR(20) NOT NULL,
`edit` TINYINT(1) NOT NULL DEFAULT 0,
PRIMARY KEY (`id`)
);') or die($mysqli->error);
$mysqli->query('
CREATE TABLE `crm`.`accounts`
(
`id` INT NOT NULL AUTO_INCREMENT,
`role` TINYINT(1) NOT NULL DEFAULT 1,
`user_name` VARCHAR(20) NOT NULL,
`password` VARCHAR(100) NOT NULL,
`email` VARCHAR(100) NOT NULL,
`first_name` VARCHAR(50) NOT NULL,
`last_name` VARCHAR(50) NOT NULL,
`hash` VARCHAR(32) NOT NULL,
`active` BOOL NOT NULL DEFAULT 0,
PRIMARY KEY (`id`),
FOREIGN KEY (`role`) REFERENCES roles(`id`)
);') or die($mysqli->error);
and every combination of SELECT is working fine now. I don't know what the problem was since I don't remember making any changes on the tables.