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  • How to merge data using php.

    - by bob
    Currently my MySQL data stored like below product | total ------------------------------------------ puma,adidas | 100.00,125.00 puma | 80.00 reebok,adidas,puma | 70.00,100.00,125.00 adidas,umbro | 125.00,56.00 How to combine, explode, merge and total it like this in php? puma 485.00 adidas 350.00 reebook 70.00 umbro 56.00

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  • Parallelism in Python

    - by fmark
    What are the options for achieving parallelism in Python? I want to perform a bunch of CPU bound calculations over some very large rasters, and would like to parallelise them. Coming from a C background, I am familiar with three approaches to parallelism: Message passing processes, possibly distributed across a cluster, e.g. MPI. Explicit shared memory parallelism, either using pthreads or fork(), pipe(), et. al Implicit shared memory parallelism, using OpenMP. Deciding on an approach to use is an exercise in trade-offs. In Python, what approaches are available and what are their characteristics? Is there a clusterable MPI clone? What are the preferred ways of achieving shared memory parallelism? I have heard reference to problems with the GIL, as well as references to tasklets. In short, what do I need to know about the different parallelization strategies in Python before choosing between them?

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  • SQL query for select distinct with most recent timestamp first

    - by Josh
    I have a mysql table with three columns: username, location, timestamp. This is basically a log of user activity of what location they are in and the time that they were there. What I want to do is select a distinct username+location where only the most recent item (by timestamp) is provided. So say the table consists of: tom roomone 2011-3-25 10:45:00 tom roomtwo 2011-3-25 09:00:00 tom roomtwo 2011-3-25 08:30:00 pam roomone 3011-3-25 07:20:23 I would want only these to be selected: tom roomone 2011-3-25 10:45:00 tom roomtwo 2011-3-25 09:00:00

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  • How to output two ddl files at the same time with using maven hbm2ddl plugin

    - by daniel-cai
    Our application needs to use two different kinds of databases.One is oracle, the other is mysql and we want to use maven plugin hbm2ddl to generate the ddl file, and want to output the two ddl files at the same time, I don't know how to set the configuration in pom.xml. I tried to use this plugin twice, but it always generated one ddl file. Any one encountered such case before ? could u please give some advice.

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  • PHP fckeditor problem?

    - by TaG
    How do I correct the following error that is listed below. I'm using PHP & MySQL. I get the following error. Not Found The requested URL /fckeditor/editor/fckeditor.html was not found on this server. I followed the directions on http://docs.cksource.com/FCKeditor_2.x/Developers_Guide/Integration/PHP

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  • Formating Contents in RSS

    - by shoaibmohammed
    Hi, I'm making a RSS 2.0 feed powered by PHP & MySQL. I would like to know how to make simple formatting in the contents like Line Breaks, Bold, Italics, Links, Images. When I try to insert a <br> in the database for a newline, the feed reader is displaying it as Invalid Feed. Please help Thanks

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  • Find date difference in php?

    - by Karthik
    Is there anyway to find the date difference in php? I have the input of from date 2003-10-17 and todate 2004-03-24. I need the results how many days is there within these two days. Say if 224 days, i need the output in days only. I find the solution through mysql but i need in php. Anyone help me, Thanks in advance.

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  • Hadoop on windows server

    - by Luca Martinetti
    Hello, I'm thinking about using hadoop to process large text files on my existing windows 2003 servers (about 10 quad core machines with 16gb of RAM) The questions are: Is there any good tutorial on how to configure an hadoop cluster on windows? What are the requirements? java + cygwin + sshd ? Anything else? HDFS, does it play nice on windows? I'd like to use hadoop in streaming mode. Any advice, tool or trick to develop my own mapper / reducers in c#? What do you use for submitting and monitoring the jobs? Thanks

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  • Python - excel - xlwt: colouring every second row

    - by konjo
    Hi, i just finish some MYSQL to excel script with xlwt and I need to colour every second row for easy reading. I have tried this: row = easyxf('pattern: pattern solid, fore_colour blue') for i in range(0,10,2): ws0.row(i).set_style(row) Alone this colouring is fine, but when when I write my data rows are again white. Can some please show me some example 'cuz I m lost in coding :/ Best Regards.

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  • Any good SQL Anywhere database schema comparison tools?

    - by Lurker Indeed
    Are there any good database schema comparison tools out there that support Sybase SQL Anywhere version 10? I've seen a litany of them for SQL Server, a few for MySQL and Oracle, but nothing that supports SQL Anywhere correctly. I tried using DB Solo, but it turned all my non-unique indexes into unique ones, and I didn't see any options to change that.

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  • Where can I find an introduction to using PDO?

    - by aslum
    I know my SQL safety isn't up to par. I've read on this site that PHP PDO would be a good first step, and while I did take a look at the PDO Manual it's a bit daunting. Is there somewhere I can find a tutorial on the basics of using PDO rather then straight MySQL calls?

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  • Clojure / HBase: How to Import HBaseTestingUtility in v0.94.6.1

    - by David Williams
    In Clojure, if I want to start a test cluster using the hbase testing utility, I have to annotate my dependencies with: [org.apache.hbase/hbase "0.92.2" :classifier "tests" :scope "test"] First of all, I have no idea what this means. According to leiningens sample project.clj ;; Dependencies are listed as [group-id/name version]; in addition ;; to keywords supported by Pomegranate, you can use :native-prefix ;; to specify a prefix. This prefix is used to extract natives in ;; jars that don't adhere to the default "<os>/<arch>/" layout that ;; Leiningen expects. Question 1: What does that mean? Question 2: If I upgrade the version: [org.apache.hbase/hbase "0.94.6.1" :classifier "tests" :scope "test"] Then I receive a ClassNotFoundException Exception in thread "main" java.lang.ClassNotFoundException: org.apache.hadoop.hbase.HBaseConfiguration Whats going on here and how do I fix it?

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  • process killed -- delete output file?

    - by user151841
    I have a bash script that runs on our shared web host. It does a dump of our mysql database and zips up the output file. Sometimes the mysqldump process gets killed, which leaves an incomplete sql file that still gets zipped. How do I get my script to 'notice' the killing and then delete the output file if the killing occurred?

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  • Help I don't know how to handle this error (java.lang.RuntimeException: EMBEDDED Broker start failur

    - by HC
    I follow this tutorial (http://www.netbeans.org/kb/docs/websvc/rest-mysql.html) and it's success, but when i try with my database, it become error. I already follow step by step , but still error, anyone know how to handle this error? or it's bug too? MQJMSRA_RA4001: start:Aborting:Exception starting EMBEDDED broker=EMBEDDED Broker start failure:code = 1 java.lang.RuntimeException: EMBEDDED Broker start failure:code = 1 at com.sun.messaging.jms.ra.EmbeddedBrokerRunner.start(EmbeddedBrokerRunner.java:268) at com.sun.messaging.jms.ra.ResourceAdapter.start(ResourceAdapter.java:472)

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  • Essential skills of a Data Scientist

    - by harshsinghal
    I would like to know more about the relevant skills in the arsenal of a Data Scientist, and with new technologies coming in every day, how one picks and chooses the essentials. A few ideas germane to this discussion: Knowing SQL and the use of a DB such as MySQL, PostgreSQL was great till the advent of NoSql and non-relational databases. MongoDB, CouchDB etc. are becoming popular to work with web-scale data. Knowing a stats tool like R is enough for analysis, but to create applications one may need to add Java, Python, and such others to the list. Data now comes in the form of text, urls, multi-media to name a few, and there are different paradigms associated with their manipulation. What about cluster computing, parallel computing, the cloud, Amazon EC2, Hadoop ? OLS Regression now has Artificial Neural Networks, Random Forests and other relatively exotic machine learning/data mining algos. for company Thoughts?

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  • Getting clusters of rows close together in time

    - by Mike
    I have a table basically like so ID | ItemID | Start | End | --------------------------------------------------------------- 1 234 10/20/09 8:34:22 10/20/09 8:35:10 2 274 10/20/09 8:35:30 10/20/09 8:36:27 3 272 10/21/09 12:15:00 10/21/09 12:17:00 4 112 10/21/09 12:20:14 10/21/09 12:21:21 5 15 10/21/09 12:22:39 10/21/09 12:24:15 There are two "clusters" of entries here, 1-2 and 3-5 separated by a gap in time, specifically 30 minutes is what I'm interested in. What I would like is the first and last rows of the cluster of entries. This is fairly easy to achieve by retrieving all the rows and looping through them in order of start time, but I'd like to have it in SQL if possible. I'm using SQL Server 2008, thanks.

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  • SQLite long to wide formats?

    - by Stephen
    Hi, I wonder if there is a canonical way to convert data from long to wide format in SQLite (is that operation usually in the domain of relational databases?). I tried to follow this example for MySQL but I guess SQLite does not have the same IF construct... Thanks!

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  • facebook quote application error

    - by fusion
    how do i code a facebook quote application taking its data from php/mysql page generating quotes randomely? i've already developed one, but it's using jquery which fbml doesn't support and since i'd like the profile tab i'd rather go for fbml instead of iframe. anyone have any ideas on how to do this without jquery or using fbjs? thanks!

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  • MPAPI vs MPI.NET vs ?

    - by Olexandr
    I'm working on college project. I have to develop distributed computing system. And i decided to do some research to make this task fun :) I've found MPAPI and MPI.NET libraries. Yes, they are .NET libraries(Mono, in my case). Why .NET ? I'm choosing between Ada, C++ and C# so to i've choosed C# because of lower development time. I have two goals: Simplicity; Performance; Cluster computing. So, what to choose - MPAPI or MPI.NET or something else ?

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