I'm currently having trouble trying to create a loop for my desired outcome.
I'm currently creating a student record card which stores numerous data of different students (fake students).
I have created a query which returns the relevant data I need (see picture one, phpmyadmin)
SELECT mods.mid, mtitle, credits, enrl.ayr
FROM stud, smod, mods, enrl
WHERE stud.sid = '154279' AND stud.sid = smod.sid
AND smod.mid = mods.mid AND stud.sid = enrl.sid
ORDER BY `enrl`.`ayr` DESC
As you can see by the results, there are attributes:
mid
mtitle
credits
ayr
I have ordered by ayr in decending order. I am trying to make a loop that will run through the return on this query and print out each row until the end of whatever the current year is. Almost grouping all rows with the same year e.g. '2001/02' into a sub table which I can then name and print.
As you can see by my second picture of the student records page, I need to be able to print all records for the one year, then create a new header for the next existing year and print all containing rows for that.
{EDIT}
PHP Code:
$query = "SELECT mods.mid, mtitle, credits, enrl.ayr
FROM stud, smod, mods, enrl
WHERE stud.sid = '154279' AND stud.sid = smod.sid AND smod.mid = mods.mid AND stud.sid = enrl.sid
ORDER BY enrl.ayr DESC
";
$scap = '';
$curYear = $row['ayr'];
if($result = $link->query($query)) {
while ($row = $result->fetch_assoc() && $row['ayr'] == $curYear) {
$scap .= "<table id=\"test\" style=\"width:100%\">
<tr>
<td> " . $row['mid'] . " </td> <td> " . $row['mtitle'] . "</td> <td> " . $row['credits'] . " <td> " . $row['ayr'] . "</td>
</tr>
</table>";
}$result->free();
}
Thanks in advance.
Let's say you commit to one query max for the whole page. Like I said in comments
I would have a variable, call it $curYear. Start it out as some junk
string. In your loop, if the cur year thing is different than
$curYear, create a new segment in your output but regardless update
$curYear variable
That was not meant to interfere with your existing source code (that much). It is just a sentinel to alert you to a year change (year/term whatever).
So it starts as some junk value, like "797fsdf*"
Now inside your while, remember, you have ALL the years coming in from that result set for all years.
Do what I said in that pink block above comparing that variable $curYear to
$row['ayr']
When those two values are different, time to do whatever HTML treatment you want (creating a new html table, a new div, who cares). Let's call this the separation thing.
Regardless, after you output the row, make sure you have set $curYear to $row['ayr']. Why is that important? Because the next loop you want to know if you need to do the separation thing.
The tricky part is if you are doing html tables, you have to close out the previous table (prior year) if you are not on your first year
Related
I have a database where teams will have multiple entries each with different locations. Each entry will have a team name. So for example, team1 might appear several times but each time the location will be different.
The structure of the DB is (each of these represents a column header):
team_name, first_name, last_name, location, arrival_time
My current working code creates HTML tables grouped by team name but currently only creates one row to show the first location and the time of arrival for the first location. I need this to dynamically create more rows to show all locations and arrival times for each team.
The desired result would look like this -
https://codepen.io/TheBigFolorn/pen/LqJeXr
But current result looks like this -
https://codepen.io/TheBigFolorn/pen/qgMppx
And here is an example of how the DB table might look -
https://codepen.io/TheBigFolorn/pen/daqJze
I've tried breaking up the echo and adding a second while loop before the row that I want to apply the above logic to but it seems to break everything. Any input on how I get this to work without having to use separate queries for each team would be very much appreciated. I'm new to php so please go easy on me :)
<?php
$leaders = "SELECT *, COUNT(location) FROM my_example_table GROUP BY team_name";
$result = mysqli_query($connect, $leaders) or die ("<br>** Error in database table <b>".mysqli_error($connect)."</b> **<br>$sql");
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo "
<div class='red-border'>
<h2>". $row["team_name"]. "<br><small>Total locations visited: ". $row["COUNT(location)"]. "</small></h2>
</div>
<div class='data-holder'>
<table>
<tr>
<th>Location</th>
<th>Time of arrival</th>
</tr>
<tr><td>". $row["location"]. "</td> <td>". $row["arrival_time"]. "</td></tr>
</table>
</div>
";
}
} else {
echo "0 results";
}
?>
Your problem is due to the GROUP BY, as you've probably realised. This is necessary in order to get a count per team, but causes the number of rows output to be only 1 per team - that's what grouping does. Fundamentally, running an aggregate query such as a COUNT or SUM is incompatible with also outputting all of the row data at the same time. You either do one or the other.
Now, you could run two queries - one to get the counts, and one to get all the rows. But actually you don't really need to. If you just select all the rows, then the count-per-team is implicit in your data. Since you're going to need to loop through them all anyway to output them in the HTML, you might as well use that process to keep track of how many rows you've got per team as you go along, and create the "Total number of locations" headings in your HTML based on that.
Two things are key to this:
1) Making the query output the data in a useful order:
SELECT * FROM my_example_table Order By team_name, arrival_time;
2) Not immediately echoing HTML to the page as soon as you get to a table row. Instead, put HTML snippets into variables which you can populate at different times in the process (since you won't know the total locations per team until you've looped all the rows for that team), and then string them all together at a later point to get the final output:
$leaders = "SELECT * FROM my_example_table Order By team_name, arrival_time;";
$result = mysqli_query($connect, $leaders) or die ("<br>** Error in database table <b>".mysqli_error($connect)."</b> **<br>$sql");
$currentTeam = "";
$locationCount = 0;
$html = "";
$teamHtmlStart = "";
$teamHtmlEnd = "";
if ($result->num_rows > 0)
{
while($row = $result->fetch_assoc())
{
//run this bit if we've detected a new team
if ($currentTeam != $row["team_name"]) {
//finalise the previous team's html and append it to the main output
if ($currentTeam != "") $html .= $teamHtmlStart.$locationCount.$teamHtmlEnd."</table></div>";
//reset all the team-specific variables
$currentTeam = $row["team_name"];
$teamHtmlStart = "<div class='red-border'><h2>".$currentTeam."<br><small>Total locations visited: ";
$locationCount = 0;
$teamHtmlEnd = "</small></h2>
</div>
<div class='data-holder'>
<table>
<tr>
<th>Location</th>
<th>Time of arrival</th>
</tr>";
}
$teamHtmlEnd .= "<tr><td>". $row["location"]. "</td> <td>". $row["arrival_time"]. "</td></tr>";
$locationCount++;
}
//for the final team (since the loop won't go back to the start):
$html .= $teamHtmlStart.$locationCount.$teamHtmlEnd."</table></div>";
echo $html;
}
else {
echo "0 results";
}
Here's a runnable demo (using some static data in place of the SQL query): http://sandbox.onlinephpfunctions.com/code/2f52c1d7ec242f674eaca5619cc7b9325295c0d4
A PHP page must show the content of a database's table. In another table, there is the value I will use to print the row accordingly and show as a child.
$result = pg_query($conn, "SELECT *,'SENT' as direction FROM table1 WHERE identification LIKE '%$identification%' AND expedition LIKE '$expedition' order by date DESC LIMIT '$limit' ");
This, inside a WHILE, will print this kind of table:
while ($row = pg_fetch_row($result)) {
$sql2 = pg_query($conn, " SELECT quantity FROM expedition WHERE identification='$row[2]' ");
$row2 = pg_fetch_row($sql2);
$color="white";
if ($row2[0] == "-1") { $color="red";}
if ($row2[0] == "1") { $color="green";}
if ($row2[0] == "0") { $color="grey";}
echo "<tr bgcolor=\"$color\">
<td><button class=\"btn btn-info\" type=\"button\" data-toggle=\"collapse\" data-target=\"#$row[2]\">+</button></td>
<td>row[0]</td>
<td>row[1]</td>
<td>row[2]</td>
<td>row[3]</td>
<td>row[4]</td>
<td>...and more</td>
</tr>";
echo "<tr><td colspan=9><div style=\"background-color:$color\" id=\"$row[2]\" class=\"collapse\">$row2[0]</div></td></tr> ";
I am using bootstrap to add a button that, once clicked, will open a hidden row with the content of $sql2. Query that I will print straight after the </tr>.
Notice the 1st query as row[] and the second query as row2[].
The problem:
If the second query contains more than 1 result and in all cases identification is not a PK (therefore there could be more), I am not able to print for each row the colour of its childs.
I need to extend the second query to manage a WHILE loop, in order to extract, through identification, all the values of its parent.
IF, sql2 contains -1 or 1 or 0, the parent and itself must be painted accordingly.
IF, sql2 contains different values, both of them must be painted red (as error).
The obvious choice would be to move the SQL2 at the end of the first WHILE, in this case I can have SQL2 with all the records I want.
just like using arrays or the FOR structure.
Stays though the fact that moving the code would not allow me to print all the rows, because html is wrote already.
In this case I believe I'd need Jquery to highlight the values once they are written already.
I do not know a thing of Jquery and I'd appreciate any suggestion or help.
Attached a image to show what I achieved, the green bar only contain 1 child as the code above. Forgive the ugly interface!
I'm still a novice with PHP and MySQL but willing to learn and now I'm in need of help after three days of tinkering.
First, to help you understand my db structure, I have a MySQL db table named "o70vm_invoices_items" and I'm trying to loop through the results that are for each invoice_ID. Each item in the items table has a PK (o70vm_invoices_items.id) and the invoice_ID column is a link to another table (invoices).
In the items table, for example, some invoices would have one item, others could have two or three items. I'm feeling quite challenged with how to loop through to display all of the items (o70vm_invoices_items.name) associated with each invoice.
Here is my MySQL query statement:
$queryItems = "SELECT
o70vm_invoices_items.id AS 'Item_ID',
o70vm_invoices_items.invoice_id AS 'Invoice_ID_on_Items',
o70vm_invoices_items.name AS 'Program',
o70vm_invoices_items.value AS 'Fee',
o70vm_invoices_items.amount AS 'Qty',
o70vm_invoices_items.desc AS 'forWeek',
GROUP_CONCAT(o70vm_invoices_items.desc SEPARATOR ' & ') As 'forWeekGroup',
ROUND(SUM((o70vm_invoices_items.value)*(o70vm_invoices_items.amount)),2) AS 'INV-TOTAL'
FROM o70vm_invoices_items
WHERE o70vm_invoices_items.invoice_id = $invoiceID
GROUP BY o70vm_invoices_items.invoice_id";
As you can see, I'm searching the results from INVOICE_ID. This part works great. I get these results to display easy. The problem is I'm looking to display each value in the "o70vm_invoices_items.name" column for the selected Invoice ID AND I can only display one item.
Here is my attempt to loop through the results and display the info:
// storing the result of this MySQL query
$resultItems = mysql_query($queryItems) or die(mysql_error());
echo "<table><tr>";
while($rowItems = mysql_fetch_array($resultItems))
{
echo "<td>";
echo "<input type='text' title='' name='name' id='name' value='". $rowItems['Program']. "' /><br>";
echo "</td>";
}
echo "</tr></table>";
Again, I can only get the result of one item, not all the items. Any help, very much appreciated. I think I may need a different way to write an Array perhaps. Also, as you can see, I'm displaying it in a input tag that I am hoping I will later be able to EDIT the content.
PLEASE NOTE: Once I have this figured out, I will also need to do the same for Fee and Qty columns as well.
Firstly I would rewrite the sql so that it appears easier to read, to do that assign an alias to the table and use that when referencing the fields. This is especially useful when you are joining multiple tables - each alias must be unique. In the case of your original sql because you are only drawing data from one table there is no need really for an alias nor to use the full table name as a prefix to the individual fields (ie: table.field ) - just the fieldname would have sufficed.
<?php
$queryitems = "select
o.`id` as 'item_id',
o.`invoice_id` as 'invoice_id_on_items',
o.`name` as 'program',
o.`value` as 'fee',
o.`amount` as 'qty',
o.`desc` as 'forweek',
group_concat( o.`desc` separator ' & ' ) as 'forweekgroup',
round( sum( ( o.`value` ) * ( o.`amount` ) ),2 ) as 'inv-total'
from `o70vm_invoices_items` o
where o.`invoice_id` = '$invoiceid';";
// storing the result of this MySQL query
$resultItems = mysql_query( $queryItems );
if( $resultItems ){
echo '
<table>
<tr>
<th scope="col">ID</th>
<th scope="col">Program</th>
<th scope="col">fee</th>
</tr>';
$id=0; /* Each field / element that has an id must have a unique id ~ use a counter to achieve this */
while( $row = mysql_fetch_object( $resultItems ) ){
$id++;/* Increment the id counter */
echo '
<tr>
<td>'.$row->item_id.'</td>
<td>
<input type="text" title="'.$row->program.'" name="name" id="name'.$id.'" value="' . $row->program. '" />
</td>
<td>'.$row->fee.'</td>
</tr>';
}
echo '
</table>';
} else {/* Do not give away too much information and degrade gracefully */
echo 'Sorry, there was an error retrieving relevant information from the database';
}
?>
Your query contains these two lines. Together they guarantee you'll get only one row in your resultset.
WHERE o70vm_invoices_items.invoice_id = $invoiceID
GROUP BY o70vm_invoices_items.invoice_id
Your WHERE line filters your table so the resultset only contains rows for a particular invoice_id value. Then, GROUP BY summarizes the information for that particular value in one result-set row.
From your question it sounds like you have multiple items per invoice, and you wish to show detail rows for the items. In that case you're going to need to group by the items, not the invoice_id.
Try this GROUP BY.
GROUP BY o70vm_invoices_items.id
And, you are using a very confusing nonstandard MySQL extension to the GROUP BY functionality. If you start working with more than one table, this will bite you hard. Read about it. https://dev.mysql.com/doc/refman/5.6/en/group-by-handling.html
I am at the end of my project, I have all the data from my database and everything is working fine I just can not work out how to display it in a table.
I have generated a table which is the (number of projects) * (the number of people).
The data I have collected is user_id, project_id and hours.
But how do I insert '6' (hours) into user_x's row in the column of the correct project?
I can only think to make x arrays (for the number of projects) of the length for the number of users and evaluate the project code to select the correct array and then use the user id to get the correct position to place the value and simply spit out the array into the td tag
This is incredibly messy, I wonder if I'm going about it completely wrong.
If this is indeed the best way I need to recursively create arrays and write code which references variables that might not even exist. Sounds insane to me
//for the length of projects create arrays that are the length of users and fill with 0's
for ($v = 0; $v < $rows_x; $v++){
$name = "variable{$v}";
$$name = array_fill(0, $rows_u, '0');
EDIT: What I am trying to do is show the number of hours that are booked to projects between two dates. I have gotten all the data correctly but now I need the data to land into a table so you can easily see which user booked to what project.
In an excel world I could use the project number to select the Y axis and the user id to select the X axis. However I don't know the best way to do this in php.
Surely creating an array for each project the length of the users and filling with data if there is data is not the best way.
I don't know if this is what you're looking for, but I insert my values into a table in the process of retrieving them.
You can echo the values into a <td> as long as they are in your SQL SELECT statement.
<table>
<thead>
<tr>
<th>Values1</th>
<th>Values2</th>
</tr>
</thead>
<tbody>
<?php
$sql = "SELECT value1, value2
FROM tbl_Values";
if (!$res = $link->query($sql)) {
trigger_error('Error in query ' . $link->error);
} else {
while ($row = $res->fetch_assoc()) {
?>
<tr>
<td>
<?php echo $row['value1']; ?>
</td>
<td>
<?php echo $row['value2']; ?>
</td>
</tr>
<?php
}
}
?>
</tbody>
</table>
This is the way I put data into my tables, without using arrays.
I am making a page where people can make posts. All of those posts are then shown in a table of 24 cells. I can have the last 24 posts shown with no problem, but now I don't know how to show the prior group(s) of posts. How can I fix my code to do that? I actually have this:
(I'm removing lines to make it easy to read)
$sql = "SELECT
topics.topic_id,
topics.topic_subject
ORDER BY
topics.topic_id DESC";
// ---check everything is fine---- //
function retrieve_info($result)
{
if($row = mysql_fetch_assoc($result))
{echo $topic_if; echo $topic_subject; //and what I want in every cell
}
}
<table width="100%" height="751" >
<tr><td><?php retrieve_info($result);?></td>
<td><?php retrieve_info($result);?></td>
<td><?php retrieve_info($result);?></td>
<td><?php retrieve_info($result);?></td></tr>
<!-- repeat a few more times :-) -->
</table>
I though that by changing the variable $row with a number before the if statement would alter the output, but I still see the same data printed on screen. What should I do to be able to show next group of posts?
Thanks!!!
At some point when you have hundreds or thousands of records, you are going to want to paginate the results and not just select all records from the table.
To do this you will run one query per 24 records, your sql would be more like this:
$sql = "SELECT
topics.topic_id,
topics.topic_subject
ORDER BY
topics.topic_id DESC
LIMIT 0, 24
";
and for the next 24,
LIMIT 24, 24
then
LIMIT 48, 24
and so on.
You would then make next/previous buttons to click which would refresh the page and dispay the next 24, or you would get the next results with an AJAX request and append the next 24 through the DOM.
This suggests having to take a slightly different approach then calling the same function from each table cell.
More like get the relevant 24 results based on the page number you are on, then loop through the results array and print out the table code with values inside it. Based on if the iterator of the loop is divisible by 4 (looks like your grid is 4x6), you print out new tags for the new row, and that sort of thing.
Search around a bit for pagination in php and mysql to get a sense of how this all fits together.
function retrieve_info($result)
{
while($row = mysql_fetch_assoc($result))
{
$topic_id = htmlspecialchars($row['topic_id']);
$topic_subject = htmlspecialchars($row['topic_subject']);
echo '<td>';
echo $topic_if;
echo $topic_subject; //and what I want in every cell
echo '</td>';
}
}