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  • [EF + Oracle] Inserting Data (Sequences) (2/2)

    - by JTorrecilla
    Prologue In the previous chapter we have see how to create DB records with EF, now we are going to Some Questions about Oracle.   ORACLE One characteristic from SQL Server that differs from Oracle is “Identity”. To all that has not worked with SQL Server, this property, that applies to Integer Columns, lets indicate that there is auto increment columns, by that way it will be filled automatically, without writing it on the insert statement. In EF with SQL Server, the properties whose match with Identity columns, will be filled after invoking SaveChanges method. In Oracle DB, there is no Identity Property, but there is something similar. Sequences Sequences are DB objects, that allow to create auto increment, but there are not related directly to a Table. The syntax is as follows: name, min value, max value and begin value. 1: CREATE SEQUENCE nombre_secuencia 2: INCREMENT BY numero_incremento 3: START WITH numero_por_el_que_empezara 4: MAXVALUE valor_maximo | NOMAXVALUE 5: MINVALUE valor_minimo | NOMINVALUE 6: CYCLE | NOCYCLE 7: ORDER | NOORDER 8:    How to get sequence value? To obtain the next val from the sequence: 1: SELECT nb_secuencia.Nextval 2: From Dual Due to there is no direct way to indicate that a column is related to a sequence, there is several ways to imitate the behavior: Use a Trigger (DB), Use Stored Procedures or Functions(…) or my particularly option. EF model, only, imports Table Objects, Stored Procedures or Functions, but not sequences. By that, I decide to create my own extension Method to invoke Next Val from a sequence: 1: public static class EFSequence 2: { 3: public static int GetNextValue(this ObjectContext contexto, string SequenceName) 4: { 5: string Connection = ConfigurationManager.ConnectionStrings["JTorrecillaEntities2"].ConnectionString; 6: Connection=Connection.Substring(Connection.IndexOf(@"connection string=")+19); 7: Connection = Connection.Remove(Connection.Length - 1, 1); 8: using (IDbConnection con = new Oracle.DataAccess.Client.OracleConnection(Connection)) 9: { 10: using (IDbCommand cmd = con.CreateCommand()) 11: { 12: con.Open(); 13: cmd.CommandText = String.Format("Select {0}.nextval from DUAL", SequenceName); 14: return Convert.ToInt32(cmd.ExecuteScalar()); 15: } 16: } 17:  18: } 19: } This Object Context’s extension method are going to invoke a query with the Sequence indicated by parameter. It takes the connection strings from the App settings, removing the meta data, that was created by VS when generated the EF model. And then, returns the next value from the Sequence. The next value of a Sequence is unique, by that, when some concurrent users are going to create records in the DB using the sequence will not get duplicates. This is my own implementation, I know that it could be several ways to do and better ways. If I find any other way, I promise to post it. To use the example is needed to add a reference to the Oracle (ODP.NET) dll.

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  • How to remove Ubuntu and put Windows back on?

    - by Josev King
    I installed Ubuntu 12.04, as a dual boot on my windows Vista laptop, and the next thing I know, I get black screen with error: unknown filesystem. grub rescue> I have tried reinstalling Windows, reinstalling Ubuntu, booting from Ubuntu disk, and managed to actually get into the OS, but there is nothing I can find of uninstalling Ubuntu, and deleting the partition it created. I know nothing at all about Linux, and I desperately need to get my laptop back up and running.

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  • ViewSonic PC Mini VOT132 Review

    Is that a paperweight on your desk? Oops, sorry, it's a PC -- a space- and energy-saving desktop hardly bigger than a VHS cassette, priced at just $449, but with a dual-core Intel Atom CPU and all the power that office productivity workers need.

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  • system requirement

    - by Sol
    My laptop developed a bad sectors and not working well. It was with ubutuntu 12.04 LTS operating system. Now, I want to install ubuntu in an relatively old desktop with the following specifications Hp compaq dx 2390 Intel ® Pentium Dual Core CPU, E2180 @ 2.00 GHZ, 1.20 GHz, 1 GB Ram, 160 GB Hard Drive Which k/x/ubuntu version is suitable to this desktop? PS. I am working in my final thesis and I need a stable k/x/ubuntu to this specification. Thank u

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  • How to fix SLOW graphics printing on Ubuntu 12.10? Text is OK

    - by vbasic246
    Ubuntu 12.10 32-bit upgrade (dual boot with Win-7). Custom PC, onboard NVidia graphics. Motherboard: ECS EliteGroup GF8200A Black Series "HP LaserJet 3015" multifunction printer. Graphics printing fine with UB12.04, VERY SLOW on UB12.10. Per an article ran: ~$ sudo apt-get install mesa-utils ~$ glxinfo | grep renderer Output: OpenGL renderer string: GeForce 8200/integrated/SSE2/3DNOW! Do I need to get a graphics card to fix or will software tweaks solve this?

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  • How to remove installation like SET ,metasploit

    - by Renado
    i have installed into me laptop dual boot windows 7 and ubuntu 13.04 and i have install into ubuntu SET form www.trustedsec.com .it create direcotry set but when i try to start set it dosent start .when i type ./set it get error or ./set is a direcory can you give me a solution how to install it step by step or how to remove set for my pc. a second problem is when i install aircrack-ng when i type airmon-ng on terminal my desktop go crazy and i must restart manyally form my power button. Thanks

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  • How do I disable a Nvidia 9600GT on MacBookPro 5.1?

    - by Gjan
    i finally put up a Dual Boot with Ubuntu and Lion on my old MacBookPro 5.1 As reported in many cases the discrete graphics card is turned on all the time consuming a lot of power and thus heating up the laptop. Since the discrete graphics card does not support the nvidia optimus technology, the corresponding packge nvidia-prime does not help in this case. Therefore my question is, how to manually disable the discrete graphics card Nvdidia 9600GT ? Preferably a 'switch-on-the-run' version, but a 'set-on-boot' would be totally fine!

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  • Cannot install Nvidia drivers

    - by Sagar_R
    I have 12.04 running on Intel dual core with Nvidia 8400 GS. I had installed the post-relase updates for Nvidia, but encountered some problems, so removed [deactivated] them through "Aditional drivers". After restarting, when I went to install the recommended version current drivers through "Additional drivers", I get the following error: Sorry, installation of this driver failed. Please have a look at the log file for details: /var/log/jockey.log

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  • How can I merge two non-contiguous partitions using GParted?

    - by theprise
    My dual-boot machine has partitions as follows: sda1 50 GB NTFS sda2 15 GB unallocated sda3 20 GB ext3 sda4 20 GB ext4 I would like to allocate the unused space on sda2 to my Ubuntu partition on sda4, hopefully leaving the other two partitions untouched, leaving this configuration: sda1 50 GB NTFS sda3 20 GB ext3 sda4 35 GB ext4 Is this possible? If so, how can it be done, preferably using GParted?

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  • Installing NVIDIA driver causes black screen (750M)

    - by aftrumpet
    I have a dual boot set up on a Lenovo Ideapad Y500 with NVIDIA 750M and I am having problems installing the graphics cards. I have made sure to install both linux-headers-generic and linux-source, and yet have ended up with a black screen whether I install nvidia-current, nvidia-current-updates, nvidia-experimental-310, and nvidia-319. I even tried enabling proprietary drivers through settings and still ended up with a black screen on boot. Is my graphics card just not supported yet, or is there a way to fix this?

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  • Lenovo Ideapad p500 having Windows 8 booting issues. Boot repair pastebin included!

    - by piratetone
    I recently installed Ubuntu 13.10, and thought I properly set things up to dual boot into Windows 8, but I continually get .efi errors when I attempt to boot into Windows 8. I installed Boot-Repair and used that to run the recommended fixes. It provided additional boot options within the GRUB2, but none (other than Ubuntu) are working. Here's the file I pulled from Boot Repair that shows no errors! http://paste.ubuntu.com/6321946/ I do appreciate any help - thank you!

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  • Questions on first install

    - by Jordan March
    I've just installed Ubuntu 12.10 64bit on dual boot with windows 7. I've been looking for a lot of the things people say to download, like myunity but when I search in the software center, nothing comes up, just stuff like magazines. Do I need to add some ppas for it to see them? What are some that I should add on a new install? And can anyone help me get myunity on here so I can start customising my desktop? Thanks

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  • Run windows and ubuntu parallely

    - by user3185902
    I have read about Virtualbox using which we can run both windows and ubuntu parallely, but it seems that for this we have to make one host and install the other one using Virtualbox in it. (Please correct me if wrong) I am already using both ubuntu and windows on my pc (dual boot) and I want to run the already existing ones parallely instead of installing one of them again (don't want to install the softwares again). So, is there a way by which I can do this? Thanks

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  • No upgrade option when booting from USB (12.04)

    - by Ramzi Njeim
    I am trying to upgrade my ubuntu 11.10, i know that it is better to upgrade using a live cd/usb, i booted from the live usb, followed the instructions as usual, but only found three options: Cleen install Install alongside your other operating systems Other The upgrade choice was missing. I even tried installing it after running ubuntu 12.04 from usb, and ended up with the same result. I have a dual boot Ubuntu 11.10 and Windows 7, i think it is only seeing the windows 7 and missing the ubuntu 11.10 partition. Any help ?

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  • GUI stops responding after a few seconds

    - by Nucklear
    I'm dual-booting Windows 7 and Ubuntu 12.04. When I boot Ubuntu, the interface doesn't respond to my requests. I can launch applications from the unity launcher, but when I try to close them it doesn't respond; even when I try to maximize it does nothing. I tried restarting the GUI, but after a few seconds it happens again. I had the same issue with older versions of Ubuntu and never figured it out.

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  • Micorsoft office excel in ubuntu [duplicate]

    - by user204653
    This question already has an answer here: Is it possible to run Microsoft Office 2010? 9 answers some of my files are not working in libre office and require Microsoft office please help me in installing that, i have Ubuntu 12.04, 786 MB RAM, 3.0 GHZ pentium dual processor

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  • so disappointed at ubuntu 12.04 [closed]

    - by Min
    it's been almost a month I've installed ubuntu I can't afford windows cd anymore it is my fault that I didn't dual boot it but, it doesn't make sense in that I can't use my own graphic card in my own computer because certain company doesn't support the driver card for the OS it is seemingly ridiculous that I can't even run a simple 2d game or not even a flash game with this OS a video of 480 and up doesn't run for closely a month I've tried my best to run everything my computer spec provides, but nothing works. not even sound quality

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  • ?????3:????“??”

    - by Todd Bao
    ?????SQL???????... =D select c from(select * from(select 'oracle' cc, level no from dual connect by level <= length('oracle'))model return updated rowsdimension by (no)measures (cc c, no n)rules (   c[any] = substr(c[cv()],n[cv()],1)))/ ????itpub?????????oracle????????,???????,?????????“???”,????????????????????????????????????=D ??? Todd ????:http://www.itpub.net/forum.php?mod=viewthread&action=printable&tid=1253982 Todd

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  • The boot selection failed because a required device is inaccessible 0xc000000e

    - by bbodenmiller
    A family member of mine recently went on vacation and turned off their computer, something they normally do not do, upon returning home it would not turn on and now returns the error message below. Generally friends and family come to me for help with computers and I have no problem, however this time I am a bit stumped. Any suggestions would be greatly appreciated. As you can see the error message is: Status: 0xc000000e Info: The best selection failed because a required device is inaccessible. Before going to this error message it briefly flashes the Windows loading screen. I have been able to confirm through the Windows RE Command Line and the dir command that the C: drive is accessible and likely is just suffering a bootup issue. I have tried: Launching the repair process discussed in the error message three times however each time it requires a restart and then returns to the same error message. Changing the boot order to be hard drive first Getting into safe mode; F8 just results in the same error message before I can get to the menu to select safe mode I have checked to make sure the BCD (bcdedit, Boot Configuration Data) is still intact as per https://www.symantec.com/business/support/index?page=content&id=TECH160475 I plan to try (but would like additional comments on): sfc /scannow; requires a restart and thus will likely result in the error message again A memory scan Bootrec as per http://support.microsoft.com/kb/927392#method1 Swapping IDE cables/ports Resetting the BIOS I noticed others with similar issues around the web are dual-booting however this machine is not setup in a dual-boot environment. Additionally at one point this error message supposedly showed up before I started working on the computer: The instruction at 0xfbe2584d referenced memory at 0x00000008. The memory could not be read. As previously stated any additional suggestions or words of advice would be greatly apprecaited.

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  • How do multiple displays work on a AMD 785G / ATI HD 4200 motherboard?

    - by aireq
    I just ordered a ASUS M4A785TD-V EVO which has the AMD 785G chipset and HD4200 integrated graphic. The board has VGA, DVI, and HDMI outputs. I'm wondering how many outputs I can run at once, and from what connectors? My guess is that I can only use the VGA, and either the DVI or the HDMI in a dual setup. But not the HDMI and the DVI at the same time. Is this correct? If I have devices plugged into both the HDMI and the DVI ports is there a way to choose between which port I want to use? I have a dual 19" monitor setup, as well as a LCD TV. I'd like to run the VGA and the DVI into my two monitors, and then the HDMI to my TV. Then when I want to watch something on the TV I'd like to be able to switch over from the DVI to the HDMI. Is this possible with out crawling under my desk and unplugging/plugging things in? Update I found the following in the manual off ASUS's website, which confirms my original suspicion that HDMI and DVI can't be used at the same time. But I'd still like to know if it's possible through software to switch between using the HDMI and DVI.

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  • How powerful of a PC do you need to edit HD videos?

    - by Xeoncross
    I have a Core2Quad Q8200 (2.3GHz) with 4GB of RAM, a 512MB PCIe video card, and a SATA-2 HD. Yet it still isn't fast enough to edit 720i/p video in Sony Vegas or Adobe Premiere/Aftereffects. My RAM usage never peaks over 1.6GB, but my CPU cores make it to 95% quick! Right now the preview panes in all these programs lag to bad to actually work on the videos. I get to see 1-3 frames every second or two! So how fast do I have to go? At what point will my CPU be fast enough to actually edit these videos? I have to assume that regular people and their regular sub $2k computers can actually work with this footage. Another way to answer this is, how fast is the PC you used to edit videos? Update: I'ts worth noting that now that I have Adobe Pre/AF CS4 I am more interested in getting that working than my older Vegas 6. If you didn't have to re-run RAM preview every, single, time you made one change it would be my answer. But since I like to test many filters and effects before choosing one - I have to re-render a 1-sec section of footage over-and-over and it drives me nuts waiting. Perhaps a motherboard with Dual Xeon chips or something would be able to handle this. It would probably be as much as a dual-crossfire setup and would also speed up other applications.

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  • SQL Server on Linux

    - by TimothyAWiseman
    For a particular project that is coming up, I am trying to expand my knowledge of Linux, so I am going to set up a Linux system at home. Rather than dual booting, I am thinking about putting SQL Server on a Windows Virtual Machine with Linux as the host at least until this project is over when I will probably switch back to Linux. So, I have a couple of different, but interrelated questions: How well does this work? This is only a test machine at home, so I can easily accept a fair bit of degradation, but if it is going to be a horrible reduction in performance I will dual boot instead. Is there a particular virtual machine manager I should look at to go this route? Since this is my personal machine, price is an issue but I am quite happy to pay a reasonable amount. And finally, given the choice of VMM, is there a particular Linux Distro I should be looking at? [This has been cross posted at Ask.SqlServerCentral.com . I think it may be appropriate at both sites. ]

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  • Symantec Protection Suite Enterprise Edition

    - by rihatum
    We (our company) are planning to deploy Symantec Endpoint Protection and Symantec Desktop Recovery 2011 Desktop Edition to our 3000 - 4000 workstations (Windows7 32 and 64) with a few 100s with Windows XP 32/64 Bit. I have read the implementation guide for SEP and have read tech-notes for Desktop Recovery 2011. Our team have planned to deploy this as follows : 1 x dedicated SQL 2008R2 for Symantec Endpoint Protection (Instead of using the Embedded Database) 1 x Dedicated SQL 2008R2 for Symantec Desktop Recovery 2011 (Instead of using the Embedded Database) 1 x Dedicated W2K8 R2 Box for the SEPM (Symantec Endpoint Protection Manager - Mgmt. APP) 1 x Dedicated W2K8 R2 Box for the Symantec Desktop Recovery 2011 Management Application Agent Deployment : As per Symantec Documentation for both of the above, an agent can be pushed via the Mgmt. Application (provided no firewalls are blocking ports required etc. - we have Windows firewall disabled already). Above is the initial plan we have for 3000 - 4000 client workstation (Windows) Now my Questions :-) a) If we had these users distributed amongst two sites with AD DC / GC in each site, How would I restrict SEPM and Desktop Mgmt. solution to only check for users in their respective site ? b) At present all users are under one building but we are going to move some dept. to a new location (with dedicated connectivity), How would we control which SEPM / MGMT Server is responsible for which site ? c) What Hardware would you recommend as a Server spec for the SQL server 16GB RAM, Dual XEON? d) What Hardware would you recommend as a Server spec for the MGMT Servers 16GB RAM each with DUAL xeon and sas disks? e) Also, how do you or would you recommend to protect these 4 servers (2 x SQL and 2 x MGMT Servers)? f) How would you recommend to store backups for these desktops? We do have a SAN and a NAS in our environment and we do have one spare DAS (Dell MD3000). If you have anything to add / correct - that will be really helpful before diving into the actual implementation phase. Will be most grateful with your suggestions, recommendations and corrections with above - Many Thanks ! Rihatum

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