MySQL - Group and summarize time entries on projects - php

Question

I've got these timerecording data from toggl.com where I need to have my reports formatted a bit different than what they supply - that's why I thought I'd try to import the csv data to MySQL and group and format it myself via MySQL and PHP etc. but I'm stuck almost before I started - got the data into MySQL, so now I need to output it in a html table... somehow.
I've got these data:
+-----------+---------------------------------------+------------+----------+
| Project | Task name | Date | Duration |
+-----------+---------------------------------------+------------+----------+
| Project 1 | Task name 2 | 2016-05-12 | 00:22:03 |
| Project 2 | Task name 1 | 2016-05-12 | 00:04:24 |
| Project 2 | Task name 1 | 2016-05-12 | 00:06:27 |
| Project 1 | 3. correction | 2016-05-13 | 00:08:00 |
| Project 1 | Small correction | 2016-05-13 | 00:02:02 |
| Project 1 | Last correction | 2016-05-16 | 00:05:36 |
| Project 1 | Created low-res | 2016-05-16 | 00:04:21 |
| Project 2 | Layout | 2016-05-24 | 00:27:45 |
| Project 2 | Layout | 2016-05-25 | 01:00:00 |
| Project 2 | Finishing | 2016-05-25 | 00:15:48 |
+-----------+---------------------------------------+------------+----------+
What I dream to achieve is data for each project that looks like this:
Project 2
-----------------------------------------------------
Date Tasks Total
-----------------------------------------------------
12/05/16 Task name 1 00:10:51
24/05/16 Layout 00:27:45
25/05/16 Layout, Finishing 01:15:48
-----------------------------------------------------
Project 2 total 01:54:24
So for each Project, each Date should have its own row, including Date, Task names (comma delimited) and the sum of the Duration for that Date
And then a project total.
Any help would be very appreciated!! :-)
EDIT:
SELECT
Project,
`Task name`,
Date,
Duration,
SEC_TO_TIME( SUM( TIME_TO_SEC( `Duration` ) ) ) AS TotalDuration
FROM timerecordings
GROUP BY Project, Date, `Task name` WITH ROLLUP
Gives me (don't look at the date and time formating, it's excel that does it):
+-----------+------------------+------------+----------+----------+
| Project 1 | Task name 2 | 12/05/2016 | 00.22.03 | 00.22.03 |
| Project 1 | NULL | 12/05/2016 | 00.22.03 | 00.22.03 |
| Project 1 | 3. correction | 13/05/2016 | 00.08.00 | 00.08.00 |
| Project 1 | Small correction | 13/05/2016 | 00.02.02 | 00.02.02 |
| Project 1 | NULL | 13/05/2016 | 00.02.02 | 00.10.02 |
| Project 1 | Created low-res | 16/05/2016 | 00.04.21 | 00.04.21 |
| Project 1 | Last correction | 16/05/2016 | 00.05.36 | 00.05.36 |
| Project 1 | NULL | 16/05/2016 | 00.05.36 | 00.09.57 |
| Project 1 | NULL | NULL | 00.05.36 | 00.42.02 |
| Project 2 | Task name 1 | 12/05/2016 | 00.04.24 | 00.10.51 |
| Project 2 | NULL | 12/05/2016 | 00.04.24 | 00.10.51 |
| Project 2 | Layout | 24/05/2016 | 00.27.45 | 00.27.45 |
| Project 2 | NULL | 24/05/2016 | 00.27.45 | 00.27.45 |
| Project 2 | Finishing | 25/05/2016 | 00.15.48 | 00.15.48 |
| Project 2 | Layout | 25/05/2016 | 01.00.00 | 01.00.00 |
| Project 2 | NULL | 25/05/2016 | 01.00.00 | 01.15.48 |
| Project 2 | NULL | NULL | 01.00.00 | 01.54.24 |
| NULL | NULL | NULL | 01.00.00 | 02.36.26 |
+-----------+------------------+------------+----------+----------+

Answer 1

You can use GROUP_CONCAT aggregate function to combine all task names in one string. Use SEPARATOR keyword to define the separator (default: ','). Use DISTINCT if you don't want same task to be listed multiple times.
For one project:
SELECT Date,
GROUP_CONCAT(DISTINCT `Task name` SEPARATOR ', ') AS Task,
SEC_TO_TIME(SUM(TIME_TO_SEC(Duration))) AS Total
FROM timerecordings r
WHERE Project = 'Project 2'
GROUP BY Date WITH ROLLUP;
For all projects:
SELECT SELECT Project, Date,
GROUP_CONCAT(DISTINCT `Task name` SEPARATOR ', ') AS Task,
SEC_TO_TIME(SUM(TIME_TO_SEC(Duration))) AS Total
FROM timerecordings r
GROUP BY Project, Date WITH ROLLUP;
sqlfiddle

Answer 2

Must be something like
select date, taskName, sum(duration) from tasksTable where Project = "Project 2" group by date
But how will the times be added, and how will you get all the taskNames in one field is still to be experimented.

Answer 3

So just to let you have my final result:
<?php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "timerecordings";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT
IFNULL (Project,'All Projects') Project,
IFNULL (Date,'Project total') Date,
GROUP_CONCAT(DISTINCT `Task name` SEPARATOR ', ') AS Task,
SEC_TO_TIME(SUM(TIME_TO_SEC(Duration))) AS Total
FROM timerecordingstable r
GROUP BY Project, Date WITH ROLLUP;
";
$result = $conn->query($sql);
$data = array();
while($row = $result->fetch_assoc()) {
$projectname = $row["Project"];
if (!array_key_exists($projectname, $data)) {
$data[$projectname] = array();
}
$data[$projectname][] = $row;
}
foreach ($data as $projectname => $rows) {
if($projectname != 'All Projects'){
echo '<h1>', $projectname, '</h1>';
echo '<table class="time-table"><tr class="table-header"><th>Date</th><th>Tasks</th><th>Time used</th><tr>';
foreach ($rows as $row) {
//Convert Total into seconds
$str_time = $row["Total"];
$str_time = preg_replace("/^([\d]{1,2})\:([\d]{2})$/", "00:$1:$2", $str_time);
sscanf($str_time, "%d:%d:%d", $hours, $minutes, $seconds);
$time_seconds = $hours * 3600 + $minutes * 60 + $seconds;
// Round to nearest minute
$time_seconds = round($time_seconds/60)* 60;
$hours = floor($time_seconds / 3600); //Hours
$minutes = floor(($time_seconds / 60) % 60); //Minutes
//Convert minutes to two decimal number (like 15 minutes = 0.25 hour etc.)
$minutes = $minutes / 60;
$minutes = round($minutes,2);
$minutes = $minutes*100;
$seconds = $time_seconds % 60; //Seconds - I don't use it but kept to show it's possible
//Loop each row
if($row["Date"] == 'Project total'){
echo '<tr class="table-footer"><td>', $row["Date"] , '</td><td>' , ' ' , '</td><td>' , $hours, ',',$minutes, ' hour(s)</td></tr>';
} else {
$prettyDate = DateTime::createFromFormat('Y-m-j', $row["Date"]);
echo '<tr><td>', $prettyDate->format('d-m-Y') , ':</td><td>' , $row["Task"] , '</td><td>' , $hours, ',',$minutes, ' hour(s)</td></tr>';
}
}
echo '</table>';
}
}
$conn->close();
?>
Results:
<h1>Project 1</h1>
<table class="time-table">
<tr class="table-header">
<th>Date</th>
<th>Tasks</th>
<th>Time used</th>
<tr>
<tr>
<td>12-05-2016:</td>
<td>Task name 2</td>
<td>0,37 hour(s)</td>
</tr>
<tr>
<td>13-05-2016:</td>
<td>3. correction, Small correction</td>
<td>0,17 hour(s)</td>
</tr>
<tr>
<td>16-05-2016:</td>
<td>Last correction, Created low-res</td>
<td>0,17 hour(s)</td>
</tr>
<tr class="table-footer">
<td>Project total</td>
<td> </td>
<td>0,70 hour(s)</td>
</tr>
</table>
<h1>Project 2</h1>
<table class="time-table">
<tr class="table-header">
<th>Date</th>
<th>Tasks</th>
<th>Time used</th>
<tr>
<tr>
<td>12-05-2016:</td>
<td>Task name 1</td>
<td>0,18 hour(s)</td>
</tr>
<tr>
<td>24-05-2016:</td>
<td>Layout</td>
<td>0,47 hour(s)</td>
</tr>
<tr>
<td>25-05-2016:</td>
<td>Layout, Finishing</td>
<td>101,27 hour(s)</td>
</tr>
<tr class="table-footer">
<td>Project total</td>
<td> </td>
<td>101,90 hour(s)</td>
</tr>
</table>