Join two column with same column on while php - php

Question

I have table like this
user
id | name
1 | john
2 | alicia
3 | alex
follow_table
id | follow | follower
1 | john | alex
2 | alicia | alex
posts
id | title | content | name
1 | title john | ....... | john
2 | title alicia | ....... | alicia
3 | title alex | ....... | alex
Example ;
$id = 'alex';
$select_one = select * from follow_table where follower = '$id';
$query_one = mysqli_query($mysqli, $select_one) or die (mysqli_error($mysqli));
while ($follow = mysqli_fetch_array($query_one)) {
$follow = $follow['follow'];
$select_two = select * from posts where name = '$follow';
$query_two = mysqli_query($mysqli, $select_two) or die (mysqli_error($mysqli));
while ($posts = mysqli_fetch_array($query_two)) {
echo $posts['title'];
}
}
results will like this:
id | title
1 | title john
2 | title alicia
actual sql above is correct, but I just wanted to add a query in the $follow.
my question is, how to get user.id 3 (alex) into the field $follow?
I want something like this
id | title
1 | title john
2 | title alicia
3 | title alex
thank you for that already willing to help

Answer 1

Replace $select_one by :
SELECT name
FROM user
JOIN follow_table ON (
follow_table.follower = user.name
OR follow_table.follow = user.name
)
WHERE follower = '$id';
This will retrieve every user followed by alex, and alex himself.

Answer 2

You can use CONCAT() or CONCAT_WS() as a derived field to concatenate the results of two columns.
SELECT
CONCAT_WS(' ', title, name) as full_name
FROM
//...

Answer 3

You have to use alias in this case also you have to implement your select query, I have tried this and works well,
<?php
$select_one = select * from follow_table where id = '$id';
$query_one = mysqli_query($mysqli, $select_one) or die (mysqli_error($mysqli));
while ($follow = mysqli_fetch_array($query_one)) {
$follow = $follow['follow'];
$select_two = select posts.name as posted_name,posts.* from posts where name = '$follow';
$query_two = mysqli_query($mysqli, $select_two) or die (mysqli_error($mysqli));
while ($posts = mysqli_fetch_array($query_two)) {
echo $posts['title'];
echo $posts['posted_name'];
}
}