Search Results

Search found 47861 results on 1915 pages for 'sql update'.

Page 151/1915 | < Previous Page | 147 148 149 150 151 152 153 154 155 156 157 158  | Next Page >

  • Using IF in T-SQL weakens or breaks execution plan caching?

    - by AnthonyWJones
    It has been suggest to me that the use of IF statements in t-SQL batches is detrimental to performance. I'm trying to find some confirmation of this assertion. I'm using SQL Server 2005 and 2008. The assertion is that with the following batch:- IF @parameter = 0 BEGIN SELECT ... something END ELSE BEGIN SELECT ... something else END SQL Server cannot re-use the execution plan generated because the next execution may need a different branch. This implies that SQL Server will eliminate one branch entirely from execution plan on the basis that for the current execution it can already determine which branch is needed. Is this really true? In addition what happens in this case:- IF EXISTS (SELECT ....) BEGIN SELECT ... something END ELSE BEGIN SELECT ... something else END where it's not possible to determine in advance which branch will be executed?

    Read the article

  • Deployment of SQL Server: installing a second instance?

    - by Workshop Alex
    Simple problem. I'm working on a Delphi 2007/WIN32 application which now uses MS Access as simple data store. I have to modify it to support SQL Server Express, which is easy. These modifications are working so the application can be deployed using either SQL Server or MS Access. (Whatever the user prefers.) I did consider deploying the whole application together with the SQL Compact but this is not practicak. Using SQL Server Express 2008 instead of 2005 is an option, but also has a few nasty side-effects which we don't want to resolve for now. The problem is deploying the whole project. The installation with SQL Server would need a quiet installation so the user won't notice it. SQL Server is mentioned in the documentation so they know it's there. We just don't want to bother them with technical issues. In most cases, such an installation will go just fine. But what if the user already has an SQL Server (2005) installation which is used for something else? Personally, I would prefer to just install a second instance of SQL Server on their system so it won't conflict with the other installation. (Thus, if they uninstall the other app, the SQL instance will just stay installed.) While SQL Server 2005 and 2008 can be installed on the same system simply by using two different names for the instance, I wonder if it's also possible to install SQL Server 2005 twice on a single system to get two instances. And if possible, how?

    Read the article

  • How to limit the number of connections to a SQL Server server from my tomcat deployed java applicati

    - by CJ
    I have an application that is deployed on tomcat on server A and sends queries to a huge variety of SQL Server databases on an server B. I am concerned that my application could overload this SQL Server database server and would like some way to preventing it making requests to connect to any database on that server if some arbitrary number of connections were already in existence and unclosed. I am looking at using connection pooling but am under the impression that this will only pool connections to a specific database on the SQL Server server, I want to control the total of these combined connections that will occur to many different databases (incidentally I can only find out the names of individual db's dynamically as they change day to day). Will connection pooling take care of this for me, are am I looking at this from the wrong perspective? I have no access to the configuration of the SQL Server server. Links to tutorials or working examples of your suggested solution are most welcome!

    Read the article

  • Why would someone use WHERE 1=1 AND <conditions> in a SQL clause?

    - by Bogdan Maxim
    Why would someone use WHERE 1=1 AND <conditions> in a SQL clause (Either SQL obtained through concatenated strings, either view definition) I've seen somewhere that this would be used to protect against SQL Injection, but it seems very weird. If there is injection WHERE 1 = 1 AND injected OR 1=1 would have the same result as injected OR 1=1. Later edit: What about the usage in a view definition?

    Read the article

  • updating a column in a table only if after the update it won't be negative and identifying all updat

    - by Azeem
    Hello all, I need some help with a SQL query. Here is what I need to do. I'm lost on a few aspects as outlined below. I've four relevant tables: Table A has the price per unit for all resources. I can look up the price using a resource id. Table B has the funds available to a given user. Table C has the resource production information for a given user (including the number of units to produce everyday). Table D has the number of units ever produced by any given user (can be identified by user id and resource id) Having said that, I need to run a batch job on a nightly basis to do the following: a. for all users, identify whether they have the funds needed to produce the number of resources specified in table C and deduct the funds if they are available from table B (calculating the cost using table A). b. start the process to produce resources and after the resource production is complete, update table D using values from table C after the resource product is complete. I figured the second part can be done by using an UPDATE with a subquery. However, I'm not sure how I should go about doing part a. I can only think of using a cursor to fetch each row, examine and update. Is there a single sql statement that will help me avoid having to process each row manually? Additionally, if any rows weren't updated, the part b. SQL should not produce resources for that user. Basically, I'm attempting to modify the sql being used for this logic that currently is in a stored procedure to something that will run a lot faster (and won't process each row separately). Please let me know any ideas and thoughts. Thanks! - Azeem

    Read the article

  • SQL Express 2008 R2 on Amazon EC2 instance: tons of free memory, poor performance

    - by gravyface
    The old SQL Express 2005 was running on a low-end single Xeon CPU Dell server, RAID 5 7200 disks, 2 GB RAM (SBS 2003). I have not done any baseline measurements on the old physical server, but the Web app is used by half a dozen people (maybe 2 concurrently), so I figured "how bad can an Amazon EC2 instance be?". It's pretty horrible: a difference of 8 seconds of load time on one screen. First of all, I'm not a SQL guru, but here's what I've tried: Had a Small Instance, now running a c1.medium (High Cpu Medium) Windows 2008 32-bit R2 EBS-backed instance running IIS 7.5 and SQL Express 2008 R2. No noticeable improvement. Changed Page File from fixed 256 to Automatic. Setup a Striped Mirror from within Disk Management with two attached 1 GB EBS volumes. Moved database and transaction log, left everything else on the boot EBS volume. No noticeable change. Looked at memory, ~1000 MB of physical memory free (1.7 GB total). Changed SQL instance to use a minimum of 1024 RAM; restarted server, no change in memory usage. SQL still only using ~28MB of RAM(!). So I'm thinking: this database is tiny (28MB), why isn't the whole thing cached in RAM? Surely that would speed up performance. The transaction log is 241 MB. Seems kind of large in comparison -- has this not been committed? Is it a cause of performance degradation? I recall something about Recovery Models and log sizes somewhere in my travels, but not positive. Another thing: the old server was running SQL Express 2005. Not sure if that has any impact, but I tried changing the compatibility level from SQL 2000 to 2008, but that had no effect. Anyways, what else can I try here? Seems ridiculous to throw more virtual hardware at this thing. I know I/O is going to be rough on EBS volumes, but surely others are successfully running small .NET/SQL apps on reasonably priced instances?

    Read the article

  • Determining Azure SQL Database requirements

    - by Gerald
    I'm looking into moving an SQL Server database project to the cloud using Azure SQL Database. I'm just wondering what metrics I can use from SQL Server to help determine what my needs will be on Azure. The size of the database is around 150GB, so I understand what my needs are in terms of storage, I'm just not sure what metrics I can use to translate my database usage to the DTU benchmark metrics that the various service tiers on Azure SQL use.

    Read the article

  • Updating to linux-image-3.2.0-26-generic occupies all disk space

    - by user42228
    I just ran a normal update through the update manager that wanted to update me to linux-image-3.2.0-26-generic. The installation paused halfway with a message that the root was full. I checked the disk usage, and noticed that one of the newly installed files: /lib/modules/3.2.0-26-generic/modules.ccwmap took up 63GB(!). Compared to the previous version: /lib/modules/3.2.0-24-generic/modules.ccwmap that took up only 4KB it seems like something went awfully wrong! As mentioned the update was paused when i ran out of disk space. There is no option in the update dialog to cancel or perform rollback on the update. Is it asking for trouble to kill the update manager? Any ideas as to what went wrong, and what I can do to remedy it? It's only minimal how much space I can free on that partition (without deleting the above mentioned file). If it is any help, the update was paused after this: Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/dkms 3.2.0-26-generic /boot/vmlinuz-3.2.0-26-generic

    Read the article

  • UPDATE Table SET Field

    - by davlyo
    This is my Very first Post! Bear with me. I have an Update Statement that I am trying to understand how SQL Server handles it. UPDATE a SET a.vField3 = b.vField3 FROM tableName a INNER JOIN tableName b ON a.vField1 = b.vField1 AND b.nField2 = a.nField2 – 1 This is my query in its simplest form. vField1 is a Varchar nField2 is an int (autonumber) vField3 is a Varchar I have left the WHERE clause out so understand there is logic that otherwise makes this a nessessity. Say vField1 is a Customer Number and that Customer has 3 records The value in nField2 is 1, 2, and 3 consecutively. vField3 is a Status When the Update comes to a.nField2 = 1 there is no a.nField2 -1 so it continues When the Update comes to a.nField2 = 2, b.nField2 = 1 When the Update comes to a.nField2 = 3, b.nField2 = 2 So when the Update is on a.nField2 = 2, alias b reflects what is on the line prior (b.nField2 = 1) And it SETs the Varchar Value of a.vField3 = b.vField3 When the Update is on a.nField2 = 3, alias b reflects what is on the line prior (b.nField2 = 2) And it (should) SET the Varchar Value of a.vField3 = b.vField3 When the process is complete –the Second of three records looks as expected –hence the value in vField3 of the second record reflects the value in vField3 from the First record However, vField3 of the Third record does not reflect the value in vField3 from the Second record. I think this demonstrates that SQL Server may be producing a transaction of some sort and then an update. Question: How can I get the DB to Update after each transaction so I can reference the values generated by each transaction?

    Read the article

  • Create a CDROM Bootdisk to update BIOS

    - by osij2is
    So, I have a Tyan Opteron board with a very old BIOS version. I realize Opteron's aren't exactly common like Athlons, Phenoms, Intel CPUs, etc. but my question revolves around updating the BIOS, however I don't have a floppy drive and there's no option to boot off of a USB key. Tyan has incomplete instructions on their website (link) on how to flash the BIOS via USB. So my second tactic has been to create a Windows 98 boot-able CDROM with the flash utilities on it. It's been years since I've made one but after going to sites like bootdisk.com and such I haven't had any success. Can anyone tell me step-by-step how to make a boot-able Windows 98 CDROM? I can't believe I'm having such a hard time doing this but I've failed on four different attempts and I must be doing something wrong or I'm not accounting for something.

    Read the article

  • update samba on ubuntu 8.04ltr

    - by Crash893
    I have had a few problems getting windows 7 pc's to join my samba domain. The reason I've gathered is because the samba server software is outdated. What is involved in updating to the newest 3.5.x from the version that comes with 8.04ltr are there any pitfalls i should know about. what about very detailed instructions (I'm still learning Linux in general)

    Read the article

  • Jan 2010 Microsoft update trashed my Win XP (64bit) PC

    - by Mark Pawelek
    I waited until this morning to install these 5 updates. My ancient Win XP (32 bit) PC has no problems but my Win XP 64 bit will not start. From the startup menu none of the 5 options given (e.g. safe mode, last known good configuration, etc) work. After selecting an option, the Windows Logo screen appears. About 9 seconds later a blue screen of death flashes [I can't read the error messages because it's there for about 100 ms] then it cycles through the reboot again. PS: This is a pretty cheap mobo (Ge Force) with an AMD 3 GH chip - but until today it did actually work. What should I do? Reinstall the O/S?

    Read the article

  • Could today's windows update have caused boot problems?

    - by gjvdkamp
    I have a 64 bit box that is dual boot Windows 7 64bit and Ubuntu. I booted into windows today and saw the 'updates ready' sign on the shutdown button so I clicked to let it install. It took a while to install 2 updates. Then I rebooted but now it doesn't get past the motherboard splash screen. So I don't even get the disks found messages or let alone the prompt to choose windows or Linux. Cold this be caused by the updates? Seems weird for a windows patch to have consequences beyond the windows os, but it seems unlikely to be a coincidence Thanks, Gert-jan

    Read the article

  • Mac OS X: Update Python for Shell

    - by Nathan G.
    So, I see similar questions, but none of the answers work for me. I updated Python to 3.1.3 from 2.6.1. Everything works, except: When I type python into Terminal, I get: Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> So, how do I change the version of Python that runs in the Shell? I've tried the script that they provide. It adds their directory to my $PATH, but it still doesn't change the version that'd displayed from Terminal. Here's what I get when I echo $PATH: /Library/Frameworks/Python.framework/Versions/3.1/bin:/Library/Frameworks/Python.framework/Versions/3.1/bin:/Library/Frameworks/Python.framework/Versions/3.1/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin It appears that the script provided has added their directory for every time I ran the script (I tried it a few times, naturally). I'll gives links to caps of what is in the other relevant folders it mentions: /Library/Frameworks/Python.framework/Versions/3.1/bin /usr/local/bin /usr/bin Thakns in advance for any ideas!

    Read the article

  • Check services at startup of SQL Server

    - by SQL DBA
    I am trying to check the state of services when SQL Server is started. I am using xp_cmdshell and 'sc query SQLServerAgent | FIND "STATE"' for example to load the output to a global temp table. It works when SQL Server has already started but does not work when the proc is set to autoexec, via sp_procoption.

    Read the article

  • How to commit inside a CURSOR Loop?

    - by user320587
    Hi, I am trying to see if its possible to perform Update within a cursor loop and this updated data gets reflected during the second iteration in the loop. DECLARE cur CURSOR FOR SELECT [Product], [Customer], [Date], [Event] FROM MyTable WHERE [Event] IS NULL OPEN cur FETCH NEXT INTO @Product, @Customer, @Date, @Event WHILE @@FETCH_STATUS = 0 BEGIN SELECT * FROM MyTable WHERE [Event] = 'No Event' AND [Date] < @DATE -- Now I update my Event value to 'No Event' for records whose date is less than @Date UPDATE MyTable SET [Event] = 'No Event' WHERE [Product] = @Product AND [Customer] = @Customer AND [Date] < @DATE FETCH NEXT INTO @Product, @Customer, @Date, @Event END CLOSE cur DEALLOCATE cur Assume when the sql executes the Event column is NULL for all records In the above sql, I am doing a select inside the cursor loop to query MyTable where Event value is 'No Event' but the query returns no value even though I am doing an update in the next line. So, I am thinking if it is even possible to update a table and the updated data get reflected in the next iteration of the cursor loop. Thanks for any help, Javid

    Read the article

  • When running UPDATE ... datetime = NOW(); will all rows updated have the same date/time?

    - by Darryl Hein
    When you run something similar to: UPDATE table SET datetime = NOW(); on a table with 1 000 000 000 records and the query takes 10 seconds to run, will all the rows have the exact same time (minutes and seconds) or will they have different times? In other words, will the time be when the query started or when each row is updated? I'm running MySQL, but I'm thinking this applies to all dbs.

    Read the article

  • My tricky SQL Update query not working so well.

    - by Spooks
    I am trying to update a table in my database with another row from another table. I have two parameters one being the ID and another being the row number (as you can select which row you want from the GUI) this part of the code works fine, this returns one column of a single row. (select txtPageContent FROM (select *, Row_Number() OVER (ORDER BY ArchiveDate asc) as rowid from ARC_Content Where ContentID = @ContentID) as test Where rowid = @rowID) its just when i try to add the update/set it won't work. I am probably missing something update TBL_Content Set TBL_Content.txtPageContent = (select txtPageContent FROM (select *, Row_Number() OVER (ORDER BY ArchiveDate asc) as rowid from ARC_Content Where ContentID = @ContentID) as test Where rowid = @rowID) Thanks for the help! (i have tried top 1 with no avail)

    Read the article

  • Stairway to T-SQL DML Level 10: Changing Data with the UPDATE Statement

    Unless you are working on a reporting-only application you will probably need to update tables in your SQL Server database. To update rows in a table you use the UPDATE statement. In this level we will be discussing how to find and update records in your database, and discuss the pitfalls you might run into when using the UPDATE statement. Is your SQL Database under Version Control?SSMS plug-in SQL Source Control connects SVN, TFS, Git, Hg and all others to SQL Server. Learn more.

    Read the article

  • SQL Server 2000 and SSL Encryption

    - by Angry_IT_Guru
    We are a datacenter that hsots a SQL Server 2000 environment which provides database services for a product we sell that is loaded as a rich-client applicatin at each of our many clients and their workstations. Currently today, the application uses straight ODBC connections from the client site to our datacenter. We need to begin encrypting the credentials -- since everything is clear-text today and the authentication is weakly encrypted -- and I'm trying to determine the best way to implement SSL on the server with minimizing the impact of the client. A few things, however: 1) We have our own Windows domain and all our servers are joined to our private domain. Our clietns no nothing of our domain. 2) Typically, our clients connect to our datacenter servers either by: a) Using TCP/IP address b) Using a DNS name that we publish via internet, zone transfers from our DNS servers to our customers, or the client can add static HOSTS entries. 3) From what I understand from enabling encryption is that I can go to the Network Utility and select the "encryption" option for the protocol that I wish to encrypt. Such as TCP/IP. 4) When the encryption option is selected, I have a choice of installing a third-party certificate or a self-signed. I have tested the self-signed, but do have potential issues. I'll explain in a bit. If I go with a third-party cert, such as Verisign, or Network solutions... what kind of certificate do I request? These aren't IIS certificates? When I go create a self-signed via Microsoft's certificate server, I have to select "Authentication certificate". What does this translate to in the third-party world? 5) If I create a self-signed certificate, I understand that the "issue to" name has to match the FQDN for the server that is running SQL. In my case, I have to use my private domain name. If I use this, what does this do for my clients when trying to connect to my SQL Server? Surely they cannot resolve my private DNS names on their network.... I've also verified that when the self-signed certificate is installed, it has to be in the local personal store for the user account that is running SQL Server. SQL Server will only start if the FQDN matches the "issue to" of the certificate and SQL is running under the account that has the certificate installed. If I use a self-signed certificate, does this mean I have to have every one of my clients install it to verify? 6) If I used a third-party certificate, which sounds like the best option, do all my clients have to have internet access when accessing my private servers of their private WAN connection to use to verify the certificate? What do I do about the FQDN? It sounds like they have to use my private domain name -- which is not published -- and can no longer use the one that I setup for them to use? 7) I plan on upgrading to SQL 2000 soon. Is setup of SSL any easier/better with SQL 2005 than SQL 2000? Any help or guiadance would be appreciated

    Read the article

< Previous Page | 147 148 149 150 151 152 153 154 155 156 157 158  | Next Page >