Display Two tables data in Php - php

Question

i have following tables
Author
id | author_name | author_detail | author_bio
books
id | author_id | book_name | book_detail
i want to display data in following way
Author Name ::
Author Detail ::
books :: 1.book1
2.book2
3.book3
4.book4
i have tried following query but didnt worked as per my requirement
select * from authors left join books on author.id=books.author_id
i have tried group concat but it gives books name with coma seperate.so i want to books detail in array
select author.author_name,author.author_detail,author.author_bio,group_concat(books.book_name) eft join books on author.id=books.author_id
i am expexting output like
Array
(
[0] => Array
(
[id] => 1
[name] => Norm
[books] => Array
(
[0] =>Array
(
[id] => 4
[book_name] => great wall
[created_at] => 2015-09-11 04:45:07
[updated_at] => 2015-09-11 04:45:07
)
[1] =>Array
(
[id] => 6
[book_name] =>new book
[created_at] => 2015-09-11 04:45:07
[updated_at] => 2015-09-11 04:45:07
)
)
)
[1] => Array
(
[id] => 2
[name] => Norm
[books] => Array
(
[0] =>Array
(
[id] => 2
[book_name] => amazing star
[created_at] => 2015-09-11 04:45:07
[updated_at] => 2015-09-11 04:45:07
)
[1] =>Array
(
[id] => 3
[book_name] =>way of journy
[created_at] => 2015-09-11 04:45:07
[updated_at] => 2015-09-11 04:45:07
)
)
)
i have checked this question also
displaying php mysql query result with one to many relationship
Can any one help me how to display data like above ?
thank you

Answer 1

Try this:
SELECT
A.id
A.author_name,
A.author_detail,
A.author_bio,
B.book_name,
B.created_at,
B.updated_at
FROM books AS B
LEFT JOIN author AS A
ON (A.id=B.author_id)
you will get result like this:
id | author_name | author_detail | author_bio | book_name
1 | ari | some detail | some bio | book_ari_1
1 | ari | some detail | some bio | book_ari_2
1 | ari | some detail | some bio | book_ari_3
2 | tester | some detail | some bio | book_tester_1
etc..
to make array as your expecting result you need to restructure your array result. i will asume your result array will be in $result variable
$new_result = array();
foreach ($result as $key => $value) {
if (empty($new_result[$value['id']]))
{
$new_result[$value['id']] = array(
'id' => $value['id'],
'name' => $value['name'],
'books' => array(
array(
'id' => $value['id'],
'book_name' => $value['book_name'],
'created_at' => $value['created_at'],
'updated_at' => $value['updated_at']
),
)
)
}
else
{
$new_result[$value['id']]['id'] = $value['id'];
$new_result[$value['id']]['name'] = $value['name'];
$new_result[$value['id']]['books'][] = array(
'id' => $value['id'],
'book_name' => $value['book_name'],
'created_at' => $value['created_at'],
'updated_at' => $value['updated_at']
);
}
}
the result will look like your expected. but the key number will be formated as id.
to reset key of $new_result as increment number you need to get only value use array_values() function
$new_result = array_values($new_result);

Answer 2

You could do it with your first query...but you'd have to check the author_id inside the record loop and show the author details only whenever the value changed (by comparing it with a value stored in a variable)...otherwise only show the book details.
So your code might (very roughly) look like this:
$query = "select whatever whatever...";
$records = $database->Execute($query);
foreach ($records as $fields) {
if ($fields['id'] != $previous_id) echo "Author ...";
echo "Book whatever whatever ...";
$previous_id = $fields['id'];
}
A more straightforward (although slightly longer) way would be to have a second query: a sub-query. And it would take place inside the loop through the results of the first (outer) query. So your outer query gets the authors and, after you show the author details, you have this separate query for books of the author...and you have a loop-within-the-outer-loop to show the details of each book.
So your code (very roughly) looks something like this:
$query = "select id, author_name, whatever from author";
$author_records = $database->Execute($query);
foreach ($author_records as $fields) {
echo "Author: {$fields['author_name']} whatever <br/>";
$subquery = "select whatever from books where id = whatever";
$book_records = $database->Execute($subquery);
foreach ($book_records as $otherfields) {
echo "Book whatever whatever";
}
}

Answer 3

you can do this in php no need to go in query itself but take both data in separate query i.e. books and author data
Remember i assumed $result as authors data and $result2 as books data
$item=array();
while($row=mysql_fetch_array($result))
{
$id=$row['id'];
$item[$id]['name']=$row['name'];
$item[$id]['id']=$row['id'];
$item[$id]['books']=array();
$temp=array();
while($row1=mysql_fetch_array($result2))
{
if($id==$row1['author_id'])
{
$temp['id']=$row1['id'];
$temp['book_name']=$row1['book_name'];
$temp['created_at']=$row1['created_at'];
$temp['updated_at']=$row1['updated_at'];
array_push($item['id']['books'],$temp);
}
}
}
Now here id is formatted as author's id. To get like array keys you can use array_values($item)