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  • Stuck on solving the Minimal Spanning Tree problem.

    - by kunjaan
    I have reduced my problem to finding the minimal spanning tree in the graph. But I want to have one more constraint which is that the total degree for each vertex shouldnt exceed a certain constant factor. How do I model my problem? Is MST the wrong path? Do you know any algorithms that will help me? One more problem: My graph has duplicate edge weights so is there a way to count the number of unique MSTs? Are there algorithms that do this? Thank You. Edit: By degree, I mean the total number of edges connecting the vertex. By duplicate edge weight I mean that two edges have the same weight.

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  • Inventory count in CakePHP

    - by metrobalderas
    We are developing an inventory tracking system. Basically we've got an order table in which orders are placed. When an order is payed, the status changes from 0 to 1. This table has multiple children in another table order_items. This is the main structure. CREATE TABLE order( id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY, user_id INT UNSIGNED, status INT(1), total INT UNSIGNED ); CREATE TABLE order_items( id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY, order_id INT UNSIGNED, article_id INT UNSIGNED, size enum('s', 'm', 'l', 'xl'), quantity INT UNSIGNED ); Now, we've got a stocks table with similar architecture for the acquisitions. This is the structure. CREATE TABLE stock( id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY, article_id INT UNSIGNED ); CREATE TABLE stock_items( id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY, stock_id INT UNSIGNED, size enum('s', 'm', 'l', 'xl'), quantity INT(2) ); The main difference is that stocks has no status field. What we are looking for is a way to sum each article size from stock_items, then sum each article size from order_items where Order.status = 1 and substract both these items to find our current inventory. This is the table we want to get from a single query: Size | Stocks | Sales | Available s | 10 | 3 | 7 m | 15 | 13 | 2 l | 7 | 4 | 3 Initially we thought abouth using complex find conditions, but perhaps that's the wrong approach. Also, since it's not a direct join, it turns out to be quite hard. This is the code we have to retrieve the stock's total for each item. function stocks_total($id){ $find = $this->StockItem->find('all', array( 'conditions' => array( 'StockItem.stock_id' => $this->find('list', array('conditions' => array('Stock.article_id' => $id))) ), 'fields' => array_merge( array( 'SUM(StockItem.cantidad) as total' ), array_keys($this->StockItem->_schema) ), 'group' => 'StockItem.size', 'order' => 'FIELD(StockItem.size, \'s\', \'m\' ,\'l\' ,\'xl\') ASC' )); return $find; } Thanks.

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  • In SQL, how can I count the number of values in a column and then pivot it so the column becomes the

    - by Josh Yeager
    I have a survey database with one column for each question and one row for each person who responds. Each question is answered with a value from 1 to 3. Id Quality? Speed? -- ------- ----- 1 3 1 2 2 1 3 2 3 4 3 2 Now, I need to display the results as one row per question, with a column for each response number, and the value in each column being the number of responses that used that answer. Finally, I need to calculate the total score, which is the number of 1's plus two times the number of 2's plus three times the number of threes. Question 1 2 3 Total -------- -- -- -- ----- Quality? 0 2 2 10 Speed? 2 1 1 7 Is there a way to do this in set-based SQL? I know how to do it using loops in C# or cursors in SQL, but I'm trying to make it work in a reporting tool that doesn't support cursors.

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  • JS variable scope missunderstanding

    - by meo
    I have a little problem: slideHelpers.total = 4 for (i=1;i <= slideHelpers.total; i++) { $('<a href="#">' + i + '</a>').bind('click', function(){ alert('go to the ' + i + ' slide')}).appendTo('.slideaccess') } the alert gives out 5 what is logic, because when the function click triggers i is actually 5. But i would like to have the same i as in my <a> tag. What is the best way to handle this? I could put i in the data() of the <a> tag for example but i am sure there is a easier way.

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  • Ruby: totalling amounts

    - by Michael
    I have a Donation.rb model with an amount column that takes an integer. I want to sum all the individual donations together and show the total on the home page. In the home_controller, I'm doing @donations = Donation.all and then in the view I do <% sum = 0 %> <% @donations.each do |donation| %> <%= sum += donation.amount if donation.amount? %> <% end %> The problem is that this is printing the running sum each time a new donation is added to it. I just want the total sum at the end after they've all been added together.

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  • MySQL count/sum fields

    - by Conor H
    Hi There, What I am trying to achieve is a report on daily financial transactions. With my SQL query I would like to count the total number of cash transactions, the total cash value and the same for checks. I only want to do this for a specified date. Here is a snippet of the query that I am having trouble with. These sum and count commands are processing all the data in the table and not for the selected date. (SELECT SUM(amount) FROM TRANSACTION WHERE payment_type.name = 'cash') AS total_cash, (SELECT COUNT(*) FROM TRANSACTION WHERE payment_type.name = 'cash') AS total_cash_transactions Sorry if I havent posted enough detail as I haven't time. If you need more info just ask.. Cheers.

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  • ORA-00937 error during select subquery

    - by RedRaven
    I am attempting to write a query that returns the the number of employees, the average salary, and the number of employees paid below the average. The query I have so far is: select trunc(avg(salary)) "Average Pay", count(salary) "Total Employees", ( select count(salary) from employees where salary < (select avg(salary) from employees) ) UnderPaid from employees; But when I run this I get the ora-00937 error in the subquery. I had thought that maybe the "count" function is what is causing the issue, but even running a simpler sub query such as: select trunc(avg(salary)) "Average Pay", count(salary) "Total Employees", ( select avg(salary) from employees ) UnderPaid from employees; still returns the same error. As both AVG and COUNT seem to be aggregate functions, I'm not sure why I'm getting the error? Thanks

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  • Query - Trying to SUM one field based on content of another field

    - by ShaneL
    Table: DayOfWeek Enrollments Monday 35 Monday 12 Saturday 25 Tuesday 15 Monday 9 Tuesday 15 Basically I'm trying to sum the total enrolments for each day. so the Output will look like: DayOfWeek Enrollments Monday 56 Saturday 25 Tuesday 30 I've spent around 4 hours trying to work this out trying many many different ways but no luck. The problem I'm having is i can count how many enrollments for each day but can't have it aligned with the correct day when i run the query e.g. I want The total to be on the same line as the day it was calculated from. (I hope that is clear enough)

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  • Trying to get unique records with MySQL

    - by Joshmattvander
    I have a query that is looking at a 'page_views' table. And I so far have the ability to get the total views by day. However, I am having an issue with getting unique views by day. The column I am testing against is user_id... Here's the query I have for total views. SELECT site_id, CONCAT(month(created_at) , '-', day(created_at), '-' , year(created_at)) as created_at_date, COUNT(*) as total_results FROM page_views GROUP BY day(created_at) I can't figure out the logic to just get the unique views, by day based on the user_id column though.

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  • How to keep the first result of a function from Prolog?

    - by zuhakasa
    I need to write a customized function that will be called many times by other fixed functions. In this function, at the first called time, it will return the total number of lines of a file. The second called time of this function, forward, will return the number of lines in small sections of this file. My question is how I keep the first returned result(total number of lines of a file) and use it for the next called times of my function. I need to write or declare any thing only in this function(not in the caller). Something like this: myFunction(Input, MyResult, FirstResult) :- calculateInputFunction(Input, Result), !, MyResult is Result, ... . The problem is, every time myFunction is called, it receives different Input and returns different MyResult. But I would like to keep the first MyResult to use for next called times of myFunction. How can I do that? Thanks very much for your answer in advance.

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  • How do I show the number of images attached to a post on the image attachment page?

    - by mattloak
    I use the image attachment page to show images attached to a post one by one, in a slideshow sort of affect. I'd like to be able to display the total number of images attached to the parent post and the number of the particular image that's being shown on any given attachment page so you see the picture and the words "Image 3 of 15" for example. I've played around with some different code and can get the total number of images to show on the post page, but when I insert the code on the attachment page template it always shows "1 of 1." I was having this problem a while ago and decided to re-address it, unfortunately I don't have the original code that I used and can't remember it. Anyone have any suggestions?

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  • How can you get the average of the count of records in Reporting Services

    - by Tim Coker
    I have a report where I'm counting the number of records for a day. At the bottom, I have the total records for that time period. I'd like to display the average records for each day. An example: Day Tests 1/1/2010 5 1/2/2010 10 1/3/2010 8 Average 7.7 Total 23 I can accomplish this by aggregating the data by date in SQL then just doing the Average and Sum of the count from SQL, but that would complicate the report considerably as I'm doing other column filters for the types of tests performed. There seems to be a simple way to accomplish this that I'm missing. I can't do Average(Count(field)) in SSRS, unfortunately. Is there something I'm missing, or is there really not a way to accomplish this simply?

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  • Getting confused why i dont get expected amount ?

    - by Stackfan
    I have 1 result and which i will receive in Bank account, Based on that account i have to Put a balance to user account. How can you find the Handling cost from total tried 491.50 / 0.95 = 517.36 which is wrong ? It should be 500.00 (to my expectation) User balance requires 500.00 When 500.00 selected he gets 5% discount There is a handling cost for this ex: 1) Discount: 500.00 - 5% = 475.00 2) Handling cost: (475.00 x 0.034) + 0.35 = 16.50 3) Total: 475.00 + 16.50 = 491.50 So problem is from 491.50, i have to find atleast handling cost to get promised Balance. Any solution ? Cant figure it out myself...

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  • MDX , Calculate Number of days when the cummulative sum of Revenues from end of a month date match with the given debt amount.

    - by Shuchi
    Hi, I have a financial cube and i have to calculate Daily Sales Outstanding as : Number of Days between the selected month last date and the earliest transaction date when cummulative sum of Revenue from last date of the month till the date where sum revenue <= the debt amount for the date . e.g On 31/12/2009 my debt amount = 2,500,000 31-Dec-09 30-Nov-09 15-Oct-09 31-Oct-09 Revenue 1,000,000 1,000,000 500,000 1,0000 Cummulative sum of revenue 1,000,000 2,00,000 2,500,000 4,000,000 No of Days 31 30 16 On 15/Oct/09 cummulative revenue is 2,500,000 which equals my debt amount on that day Count of Days = 31 + 31 + 16 = 76 Days. In other words Sum Revenue from the selected date backwards until sum total equals or exeeds the total to date balance of the debtors. Any help will be highly appreciated . If i haven't explained clearly enough or if you need more information then please let me know. Thanks in advance . Shuchi.

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  • Operations in table data with javascript

    - by Zangrandi
    I'm working with rails and I don't know javascript. I have a table with a select_tag field and I want to have another field that capture the option selected, multiply for the price captured in another field and display the total. Like this <table> <tr> <td>(select_tag)</td> <td>price</td> <td>total</td> </tr> </table

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  • Sharepoint always down on the weekend?

    - by TheGambler
    For some reason, our sharepoint site always goes down on Saturday. It's the stangest thing and I can't figure out why. I'm a total noob at sharepoint and have been thrown into being the go to guy for sharepoint with my current employer. I've tried bouncing IIS on Fridays to see if there is anything I can do before hand. Is there anything that might be scheduled that I may not know about that would cause sharepoint to go down? Remember I'm a total noob as sharepoint. Thanks to all that reply. Edit: Also this our front-end and database instances are on virtual servers.

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  • mysql search using for loop from php.

    - by deb
    hi, i am a beginner. but I'm practicing a lot for few days with php mysql, and I am trying to use for loop to search an exploded string, one by one from mysql server. Till now I have no results. I'm giving my codes, <?php // Example 1 $var = @$_GET['s'] ; $limit=500; echo " "; echo "$var"; echo " "; $trimmed_array = explode(" ", $var); echo "$trimmed_array[0]"; // piece1 echo " "; $count= count($trimmed_array); echo $count; for($j=0;$j<$count;$j++) { e cho "$trimmed_array[$j]";; echo " "; } echo " "; for($i=0; $i<$count ; $i++){ $query = "select * from book where name like \"%$trimmed_array[$i]%\" order by name"; $numresults=mysql_query($query); $numrows =mysql_num_rows($numresults); if ($numrows == 0) { echo "<h4>Results</h4>"; echo "<p>Sorry, your search: &quot;" . $trimmed_array[i] . "&quot; returned zero results</p>"; } if (empty($s)) { $s=0; } $query .= " limit $s,$limit"; $result = mysql_query($query) or die("Couldn't execute query"); echo "<p>You searched for: &quot;" . $var . "&quot;</p>"; echo "Results<br /><br />"; $count=1; while ($row= mysql_fetch_array($result)) { $name = $row["name"]; $publisher=$row["publisher"]; $total=$row["total"]; $issued=$row["issued"]; $available=$row["available"]; $category=$row["category"]; echo "<table border='1'><tr><td>$count)</td><td>$name&nbsp;</td><td>$publisher&nbsp;</td><td>$total&nbsp;</td><td>$issued&nbsp;</td><td>$available&nbsp;</td><td>$category&nbsp;</td></tr></table>" ; $count++ ; } } ?>

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  • Count Records in Listing View

    - by 47
    I have these two models: class CommonVehicle(models.Model): year = models.ForeignKey(Year) series = models.ForeignKey(Series) engine = models.ForeignKey(Engine) body_style = models.ForeignKey(BodyStyle) ... class Vehicle(models.Model): objects = VehicleManager() stock_number = models.CharField(max_length=6, blank=False) vin = models.CharField(max_length=17, blank=False) common_vehicle = models.ForeignKey(CommonVehicle) .... What I want to do is to have a count of how many times a given CommonVehicle object is used in the Vehicle class. So far my attempts are giving me one number, which is a total of all the records. How can I have the count being the total appearances for each CommonVehicle

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  • Empty database output in CI

    - by den-javamaniac
    Hi. I'm building a simple app and trying to test DB result output. But unfortunately all I'm getting is an array of size 0. Here's the controller code excerpt: $data['query'] = $this->db->query('SELECT role_id, role_privilege FROM role'); $this->load->view('welcome_message', $data); And a view code excerpt: <?php echo count($query->result_array())."<br/>"; foreach ($query->result() as $row){ echo $row->role_id . '<br/>'; echo $row->role_privilege . '<br/>'; } echo 'Total result '.$query->num_rows(); ?> And what I get is next: 0 Total result Running query from a command line gives a 2 rowed output. Can someone point out what i'm missing?

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  • SQLite delete the last 25% of records in a database.

    - by Steven smethurst
    I am using a SQLite database to store values from a data logger. The data logger will eventually fills up all the available hard drive space on the computer. I'm looking for a way to remove the last 25% of the logs from the database once it reaches a certain limit. Using the following code: $ret = Query( 'SELECT id as last FROM data ORDER BY id desc LIMIT 1 ;' ); $last_id = $ret[0]['last'] ; $ret = Query( 'SELECT count( * ) as total FROM data' ); $start_id = $last_id - $ret[0]['total'] * 0.75 ; Query( 'DELETE FROM data WHERE id < '. round( $start_id, 0 ) ); A journal file gets created next to the database that fills up the remaining space on the drive until the script fails. How/Can I stop this journal file from being created? Anyway to combined all three SQL queries in to one statement?

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  • Apache+Tomcat VS Stand Alone Tomcat or GlassFish

    - by TonyZ
    Hi, I am setting up a Debian server to serve Java web applications. I have done quite a bit of research for several weeks now. Tomcat's web site says it is better to use stand alone Tomcat for speed if you are not clustering. However, I have seen many people suggest that using Apache + Tomcat gives you better security and protection against attacks. Please assume that the process will be running on port 80 as an unprivileged user. I would assume that if you are running a firewall in front the server, Tomcat should be fine. If, however, you just want to run an exposed webserver using Linux firewall, what is the best option? Or maybe someone can recommend another open source web server. I am trying to keep the solution as light as possible as these webapps will be running in containers. All opinions welcome and valued. Thanks, Tony Z

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  • Windows 2003 VM, not connecting to VM Network

    - by TheWellington
    I am running VMware's vSphere infrastructure. I have a windows 2003 VM that is suddenly not connected to the network. I can log into vSphere and see that the VM is running, but it does not connect to the VM network. The firewall on this VM is not running. The network adapter in the VM is configured correctly. The only evidence I see indicating an issue is in the event viewer. I have the following entry. Source: VMUpgradeHelper EventID: 270 Description: Not restoring network configuration for adapter with MAC address 00:50:56:xx:xx:xx. The device ID for this adapter is unchanged. THis VM is a webserver, and it was working beautifully just two days ago. "nothing" has happened... so I am at a loss as to what may have happened. Ideas??

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  • Sharepoint 2010 - One or more services have started or stopped unexpectedly

    - by Mr Shoubs
    Does anyone know why I keep getting the following message in Sharepoint 2010 review problems and solutions list: The following services are managed by SharePoint, but their running state does not match what SharePoint expects: SPAdminV4. This can happen if a service crashes or if an administrator starts or stops a service using a non-SharePoint interface. If SharePoint-managed services do not match their expected running state, SharePoint will be unable to correctly distribute work to the service. Failing Services: SPTimerService (SPTimerV4) I assume this is referring to Sharepoint 2010 Timer Service but I can only see this in the services msc (and it is running), not in the Application Management > Manage services on server. Does anyone know why this keeps occurring and how I can stop it? Note - I looked in the event log and all I can see is that same error.

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  • CHKDSK error code 766f6c756d652e63 3f1

    - by BenjiWiebe
    On a Windows 7 computer, running chkdsk /r /f C: in repair mode, it gives the error, Unspecified error 766f6c756d652e63 3f1. or something like that. I have tried the following: uninstalling all antivirus software scanning with MalwareByte's Anti-Malware doing a Disk Cleanup running Disk Defrag booting TRK and running fsck -t ntfs (gives error Unsupported case. and not implemented). I have also tried a System Restore, but there is a Temporary Internet file that appears to be in all restore points, and that file must be corrupted or something, because System Restore always grinds to a halt when it gets to that file. What should I try next? Thanks in advance.

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