How to seperate values from joined table result? - php

Question

I have a simple joined table that looks like this.
NO CLASS NAME STATUS
1 1A JOHN 1
2 1A SARA 1
3 1A LYOD 1
4 1B JOHN 1
5 1B SHIN 1
I use textbox to display the CLASS and a TEXTAREA to display the NAME. The output of CLASS 1A should like this:
Class : 1A
Name : JOHN, SARA, LYOD
How to do it using the joined table only (not multiple query)?
THis is how I loop the result:
$query = $this->xxx->yyy($class_name); //JOINED RESULT
$data = array(
'titlepage' => APP_TITLEPAGE,
'record' => $query, //This is the result that is sent to the view
'complete' => 'true',
'loadmethod' => 'add',
'contentpage' => 'test_page/detail'
);
$this->load->view('shared/master_app', $data);

Answer 1

so your query array is something like this:
$query = [
['NO' => 1, 'CLASS' => '1A', 'NAME' => 'JOHN', 'STATUS' => '1'],
['NO' => 2, 'CLASS' => '1A', 'NAME' => 'SARA', 'STATUS' => '1'],
['NO' => 3, 'CLASS' => '1A', 'NAME' => 'LYOD', 'STATUS' => '1'],
['NO' => 4, 'CLASS' => '1B', 'NAME' => 'JOHN', 'STATUS' => '1'],
];
You may make a function that arrange it or group it
lets name it groupResults($query)
function groupResults($query) {
$result = [];
foreach($query as $queryItem) {
$result[$queryItem['CLASS']][] = $queryItem['NAME'];
}
return $result;
}
now result is looks like this:
$result = [
'1A' => ['JOHN', 'SARA', 'LYOD'],
'1B' => ['JOHN']
]
this is a snapshot of what I got:
so now you can use it like this
$query = $this->xxx->yyy($class_name); //JOINED RESULT
$data = array(
'titlepage' => APP_TITLEPAGE,
'record' => groupResults($query), //This is the result that is sent to the view
'complete' => 'true',
'loadmethod' => 'add',
'contentpage' => 'test_page/detail'
);
$this->load->view('shared/master_app', $data);
now in the view you may loop on this array as:
foreach($record as $class => $names) {
echo "<input type='text' value='" . $class . "'>";
echo "<textarea>" . implode(', ', $names) . "</textarea>";
}

Answer 2

If you want to add all name in same Class in one column then it can be possible by GROUP_CONCAT() mysql function.
adjust your query with GROUP_CONCAT. For an example see below
SELECT CLASS, GROUP_CONCAT(NAME)
FROM table_name
GROUP BY CLASS;
It will Output like this
1A JOHN,SARA,LYOD
2A JOHN,SHIN
You also can put custom separator between names using GROUP_COCAT separator
SELECT CLASS, GROUP_CONCAT(NAME SEPARATOR ' -- ')
FROM table_name
GROUP BY CLASS;
For reference MySql GROUP_CONCAT()