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  • How to backup database to disk using JPA?

    - by Nitesh Panchal
    Hello, Which query to write in JPQL for backing up database on disk? If in JPQL it's not available even native sql query will do. Also, i would like to bring one issue in front of stackoverflow developers :- This site doesn't properly work in Opera (Opera 9.63). Whenever i write question and click "Post Your question" The button click event doesn't fire at all, may be, the server side event doesn't fire or something. However, no such problem comes in IE and firefox.

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  • Looking for exercises to learn SQL, using the Northwind database

    - by MedicineMan
    I am trying to become more familiar with SQL by writing queries against the Northwind database. I am looking for some exercises that would help me to learn SQL and features of SQL Server. It is important that the exercises have solutions, and in complicated cases, it would be great if there was an explanation for the query. Thanks for the answers so far but I still have not found what I am looking for: Is there any free resource, available online, without registration, that I can find a list of these exercises?

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  • Release Process Improvements

    - by wallismark
    The process of creating a new build and releasing it to production is a critical step in the SDLC but it is often left as an afterthought and varies greatly from one company to the next. I'm hoping people will share improvements they have made to this process in their organisation so we can all takes steps to 'reduce the pain'. So the question is, specify one painful/time consuming part of your release process and what did you do to improve it? My example: at a previous employer all developers made database changes on one common development database. Then when it came to release time, we used Redgate's SQL Compare to generate a huge script from the differences between the Dev and QA databases. This works reasonably well but the problems with this approach are:- ALL changes in the Dev database are included, some of which may still be 'works in progress'. Sometimes developers made conflicting changes (that were not noticed until the release was in production) It was a time consuming and manual process to create and validate the script (by validate I mean, try to weed out issues like problem 1 and 2). When there were problems with the script (eg the order in which things were run such as creating a record which relies on a foreign key record which is in the script but not yet run) it took time to 'tweak' it so it ran smoothly. It's not an ideal scenario for Continuous Integration. So the solution was:- Enforce a policy of all changes to the database must be scripted. A naming convention was important for ensuring the correct running order of the scripts. Create/Use a tool to run the scripts at release time. Developers had their own copy of the database do develop against (so there was no more 'stepping on each others toes') The next release after we started this process was much faster with fewer problems, indeed the only problems found were due to people 'breaking the rules', eg not creating a script. Once the issues with releasing to QA were fixed, when it came time to release to production it was very smooth. We applied a few other changes (like introducing CI) but this was the most significant, overall we reduced release time from around 3 hours down to a max of 10-15 minutes.

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  • Rails offen lost connection to oracle database

    - by qichunren
    I sometimes got this error from my log/production.log file: #<ActiveRecord::StatementInvalid: OCIError: ORA-03114: not connected to ORACLE: select decode(table_name,upper(table_name),lower(table_name),table_name) name from all_tables where owner = sys_context('userenv','session_user')>, How to solve this? How to rescue this and reconnect to oracle database?

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  • WordPress deactivate a plugin via database?

    - by Scott B
    I have a wordpress script, wp-supercache, that I need to disable (as its cached on a nasty error), however, the error is causing the wp-admin redirect to fail, which means I can't get into the site to disable the plugin. Any advice? I can access the database via cpanel.

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  • NoSQL DB for .Net document-based database (ECM)

    - by Dane
    I'm halfway through coding a basic multi-tenant SaaS ECM solution. Each client has it's own instance of the database / datastore, but the .Net app is single instance. The documents are pretty much read only (i.e. an image archive of tiffs or PDFs) I've used MSSQL so far, but then started thinking this might be viable in a NoSQL DB (e.g. MongoDB, CouchDB). The basic premise is that it stores documents, each with their own particular indexes. Each tenant can have multiple document types. e.g. One tenant might have an invoice type, which has Customer ID, Invoice Number and Invoice Date. Another tenant might have an application form, which has Member Number, Application Number, Member Name, and Application Date. So far I've used the old method which Sharepoint (used?) to use, and created a document table which has int_field_1, int_field_2, date_field_1, date_field_2, etc. Then, I've got a "mapping" table which stores the customer specific index name, and the database field that will map to. I've avoided the key-value pair model in the DB due to volume of documents. This way, we can support multiple document types in the one table, and get reasonably high performance out of it, and allow for custom document type searches (i.e. user selects a document type, then they're presented with a list of search fields). However, a NoSQL DB might make this a lot simpler, as I don't need to worry about denormalizing the document. However, I've just got concerns about the rest of the data around a document. We store an "action history" against the document. This tracks views, whether someone emails the document from within the system, and other "future" functionality (e.g. faxing). We have control over the document load process, so we can manipulate the data however it needs to be to get it in the document store (e.g. assign unique IDs). Users will not be adding in their own documents, so we shouldn't need to worry about ACID compliance, as the documents are relatively static. So, my questions I guess : Is a NoSQL DB a good fit Is MongoDB the best for Asp.Net (I saw Raven and Velocity, but they're still kinda beta) Can I store a key for each document, and then store the action history in a MSSQL DB with this key? I don't need to do joins, it would be if a person clicks "View History" against a document. How would performance compare between the two (NoSQL DB vs denormalized "document" table) Volumes would be up to 200,000 new documents per month for a single tenant. My current scaling plan with the SQL DB involves moving the SQL DB into a cluster when certain thresholds are reached, and then reviewing partitioning and indexing structures.

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  • Free Spectral Images database?

    - by Hani
    I am working on a project "object detection using multi spectral imaging", but i am finding troubles because i dont have images to start testing my ideas. Now i am working with the hardware. Please Does any one knows a database for any spectral imaging(faces, flowers,..etc) such that i can test my ideas for classification until i finish the hardware.

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  • Spring, autowire @Value from a database

    - by Guido
    I am using a properties File to store some configuration properties, that are accessed this way: @Value("#{configuration.path_file}") private String pathFile; Is it possible (with Spring 3) to use the same @Value annotation, but loading the properties from a database instead of a file ?

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  • How to Configure SSL over Database in Spring?

    - by Sameer Malhotra
    Hi, I want to add SSL security in the Database layer. I am using Struts2.1.6, Spring 2.5, JBOSS 5.0 and Informix 11.5. Any idea how to do this? I have researched through a lot on the internet but could not find any solution. Please suggest! Here is my datasource and entity manager beans which is working perfect without SSL: <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> <property name="database" value="INFORMIX" /> <property name="showSql" value="true" /> </bean> </property> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="com.informix.jdbc.IfxDriver" /> <property name="url" value="jdbc:informix-sqli://SERVER_NAME:9088/DB_NAME:INFORMIXSERVER=SERVER_NAME;DELIMIDENT=y;" /> <property name="username" value="username" /> <property name="password" value="password" /> <property name="minIdle" value="2" /> </bean> <bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean" lazy-init="false"> <property name="targetObject" ref="dataSource" /> <property name="targetMethod" value="addConnectionProperty" /> <property name="arguments"> <list> <value>characterEncoding</value> <value>UTF-8</value> </list> </property> </bean> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" scope="prototype"> <property name="dataSource" ref="dataSource" /> </bean> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> <tx:annotation-driven transaction-manager="transactionManager" />

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  • Database Structure for vBulletin Message Board

    - by zen
    I am wondering if someone would be willing to post the database structure for a vBulletin message board? The SQL or screen shots would be nice. I am currently setting out a business plan for a website that will include a message forum, however, assessing the $195-$295 message board fee has me thinking about other possible solutions. I am brave.

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  • Entity Framework: Generating database from classes

    - by Anonymous Coward
    Hi Everyone Is it possible to create the database from the classes with entity framework 4.0? I found many tutorials on how to do it the other way round. But since we have already implemented and tested all classes of the domain we'd like to avoid changing them to much. If I used the wrong keywords in Google I'd appreciate you could post a link. Cheers, CA

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  • Error querying database in PHP, MySQL

    - by user296516
    Hi guys, I have this code in PHP. It connects to the DB fine, but pops an error, when tryinto to insert the info. $dbc = mysqli_connect('localhost', 'root', 'marina', 'aliendatabase') or die('Error connecting to MySQL server.'); $query = "INSERT INTO aliens_abduction (name, email) VALUSE ('John', '[email protected]')"; $result = mysqli_query($dbc, $query) or die('Error querying database.'); mysqli_close($dbc); Here's a screenshot: http://img532.imageshack.us/img532/2930/63306356.jpg Thanks, R

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  • select similar values from mysql database

    - by mathew
    Hi I have several data s in MySQL database. In my table there is a column called rank. what I want is when some one enter a rank say 25 then the result should display names on similar(+ or -) ranks LIMIT to 10 from table. example mathew - 25 john - 26 joe - 25 stewart - 27 kelly - 24 brandon -23 magy - 22 .......etc. Thanks Mathew

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  • No filenames in pdb program database.

    - by Nick
    I have a .pdb program database from a C++ application compiled in debug on Windows VS2005. I use the DIA SDK to find function names but I can't seem to retrieve the filenames for the symbols. Is there some switch I need to turn on? Does this work?!

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  • Saving images inside iPhone application without using database or server side saving technique

    - by bugs_bugs
    Hi Fellas, I am developing an application which requires saving images in the "saved folder" of iPhone Photo album after performing some animations on ImageViews. Is it possible to save the incomplete images temporarily in the iphone application without using database or server side saving technique, so that user can use it for future use and only completely changed ones should get saved in Photo Album? If yes then it would be a great help to get any code or suggestion. Thanks in advance :) !!!!

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  • Hotel Reservation system Database schema

    - by SpikETidE
    Hi Everyone.... I am about to develop a online hotel reservation system...using php and mysql... I have some doubts about my current database schema and the business logic to get the hotels in which rooms are free between two particular dates... Does anyone know of some kind of tutorial where i can get some idea about the hotel reservation schema and the business logics that should be used in the system...? Thanks for your suggestions....

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  • Srping, autowire @Value from a database

    - by Guido
    I am using a properties File to store some configuration properties, that are accessed this way: @Value("#{configuration.path_file}") private String pathFile; Is it possible (with Spring 3) to use the same @Value annotation, but loading the properties from a database instead of a file ?

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  • Sql-server Database query help

    - by menacheb
    Hi, I have a Database (Sql-server) with table named 'ProcessData' and columns named 'Process_Name' (Data Type: nvarchar(50)), 'Start_At' (DataType: DateTime) and 'End_At' (Data Type: DateTime). I need to konw for each 'Time-Interval' (let's say 1 second) how many processes (Process_Name = PN) was open (after or equal to the 'Start_at' column and before or equal to the 'End_At' column) during this time (It can be a few rows with the same data). Does anyone know how to make this query? Many thanks,

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  • Slow (to none) performance on SQL 2005 after attaching SQL 2000 database

    - by ploft
    Issue: Using the detach/attach SQL database from a SQL 2000 SP4 instance to a much beefier SQL 2005 SP2 server. Run reindex, reorganize and update statistics a couple of times, but without any success. Queries on SQL 2000 took about 1-2 sec. to complete, now the same queries take 2-3 min on the SQL 2005 (and even 2008 - tested it there also). Have looked at the execution plans and the overall percent matches or are alike on each server.

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