Cache Database Structure (How To Detect If Database-design Has Changed..)
Feb 24, 2006
Hello everyone,
I have a webcontrol that uses database-structures alot, it uses the system tables in SQL to read column information from tables. To ease the load of the SQL server I have a property that stores this information in a cache and everything works fine.
I am doing some research to find if there are anyway to get information from the SQL server that the structure from a table has changed.
I want to know if a column or table has changed any values, like datatype, name, properties, etc.
Any suggestions out there ?!
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Dec 27, 2007
Im getting this error when trying to set up a cache dependency...are there any special permissions etc?From CS:SqlCacheDependency dep = new SqlCacheDependency("MySite-Cache", "Products");Cache.Insert("Products", de.GetAllProductsList(), dep); From connectionStrings.config:<add name="SiteDB" connectionString="Data Source=localhost,[port]SQLEXPRESS;Integrated Security=true;User Instance=true; AttachDBFileName=|DataDirectory|ASPNETDB.MDF" providerName="System.Data.SqlClient" />Also tried this using my machinename<add name="SiteDB" connectionString="Data
Source=<machinename>,[port]SQLEXPRESS;Integrated Security=true;User
Instance=true; AttachDBFileName=|DataDirectory|ASPNETDB.MDF"
providerName="System.Data.SqlClient" /> From web.config: <caching> <sqlCacheDependency enabled="true" pollTime="10000"> <databases> <add name="MySite-Cache" connectionStringName="SiteDB" pollTime="2000"/> </databases> </sqlCacheDependency> </caching> EDIT: So making progress I can't seem to get the table registered for cache dependency:The sample i have says"aspnet_regsql.exe -E -S .SqlExpress -d aspnetdb -t Customers -et"and the command line response is "Enabling the table for SQL cache dependency..An error has happened. Details of the exception:The table 'Customers' cannot be found in the database."Where does this "Customers" table come from? There is obviously not an application specific "Customers" table in aspnetdb I'm confused probably more by the example than anything....
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Jul 20, 2005
I have a need to insert rows into an Audit type table when valueschange in certain fields in a table. I thought I could do this via atrigger. However, on requirement is to include in the audit both theold and new value.Is there a "simple" way to do this? I know I could query the tablebefore the update and compare to what the new value is and reactaccordingly.Just wondering if there is something nifty in Sql Server that I ammissing that could help me with this.Thanks in advance for your help.Bill
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Jan 2, 2008
Hi, I wonder where I can see last update over a table. Maybe sqlserver write some information about every table.
For example there are 300 tables in a database an I want to execute some query to see the last tables updated (list of tables updated > 2008-01-02 )
Hope to be clear,
Best regards
Ariel
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Jun 1, 2006
HI,
Any help here is appreciated, I work in a large software company that has many small teams. I am faced with the issue of some of the other teams are changing the structure of tables and views and even SPs and functions without letting the rest know of these changes.
My question is, is there a way of tracking these changes through a job to alert everyone else in case this situation happens.
regards
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Jan 6, 2008
Hi,
I have a complicated sql server mobile database (.sdf) and need to create a SQL SERVER database with the same tables. How can I do it without scripting the whole thing? I thought of using the views.information_schema databases, but it is still a lot of coding.
thanks
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Mar 1, 2004
Hi all,
How can i get the information as to when was the last my particular table structure was changed (for ex. adding of a column/dropping a column)
Pls let me know
TIA
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Feb 2, 2008
I am currently writing an install wizard for my web application. One of my steps is Installing asp.net membership, roles, and session state to the new database. My wizard detects if this step has already been completed through the page_Load event. Currently I am writing makeshift code just to see if the tables exist.Does ASP.Net provide a way to detect what services have been installed on the database? So far I have only found Install and uninstall functionality in the System.Web.Management Namespace.I have been searching for this for a while, I am sure this question has been answered somewhere, but there is so much base information on how to initially set up membership that I cant seem to find the answer.
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Jul 20, 2005
How do I detect with a query which database is off-line.And how do I detect with a query the recovery model of a database.ByeArno de Jong
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Mar 13, 2007
I been asked recently in the interview thatHow can I detect changes automatically in the SQL Server Database when anything is updated, deleted or inserted?if anyone can help me in this that will be really great.
I dont actually know whether I can ask this here but I wanted to know the answer for this and thought this might be right place to ask?
sorry if I am wrong?
Thanks in Advance
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Oct 29, 2015
I actually work in an organisation and we have to find a solution about the data consistancy in the database. our partners use to send details to the organisation and inserted directly in the database, so we want to create a new database as a buffer database to insert informations from the partners then make an update to the main database. is there a better solution instead of that?
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Oct 3, 2007
Hello,
is there a way to find out that SQL Server 2005 (Express) engine is performing startup checked of a selected database?
The problem we are faced to is that our users shutdown brutally their laptops running their database. When they start laptops again, they impatiently start the application that tries to connect to the database. However, they get an error message:
Cannot open database XXXXX requested by the login. The login failed.
When they try after a minute or two, it works.
What we would like to do is provide an information message that the SQL server is checking the database and that they must wait for a while. Is there is a specific error code for this, can anyone help? We are using .NET 2.0.
Thank you,
Jan
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Jul 23, 2005
I have a system that basically stores a database within a database (I'msure lots have you have done this before in some form or another).At the end of the day, I'm storing the actual data generically in acolumn of type nvarchar(4000), but I want to add support for unlimitedtext. I want to do this in a smart fashion. Right now I am leaningtowards putting 2 nullable Value fields:ValueLong ntext nullableValueShort nvarchar(4000) nullableand dynamically storing the info in one or the other depending on thesize. ASP.NET does this exact very thing in it's Session State model;look at the ASPStateTempSessions table. This table has both aSessionItemShort of type varbinary (7000) and a SessionItemLong of typeImage.My question is, is it better to user varbinary (7000) and Image? I'mthinking maybe I should go down this path, simply because ASP.NET does,but I don't really know why. Does anyone know what would be the benifitof using varbinary and Image datatypes? If it's just to allow saving ofbinary data, then I don't really need that right now (and I don't thinkASP.NET does either). Are there any other reasons?thanks,dave
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Aug 16, 2007
Hi All,Can u please suggest me some books for relational database design ordatabase modelling(Knowledgeable yet simple) i.e. from which we couldlearn database relationships(one to many,many to oneetc.....),building ER diagrams,proper usage of ER diagrams in ourdatabase(Primary key foreign key relations),designing smallmodules,relating tables and everything that relates about databasedesign....Coz I think database design is the crucial part of databaseand we must know the design part very first before starting up withdatabases.....Thanks and very grateful to all of you....Vikas
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Dec 6, 2007
Hi everyone,
I posted a related thread before about this error below when I process a dimension. And seems that the solution by using "ClearCache" can not fingure out the issue when I want to process a mining structure...... .
OLE DB error: OLE DB or ODBC error: There is not enough procedure cache to run this procedure, trigger, or SQL batch. Retry later, or ask your SA to reconfigure SQL Server with more procedure cache.
; Sort failed because there is insufficient procedure cache for the configured number of sort buffers. Please retry the query after configuring lesser number of sort buffers.
Could someone please give me some suggestions?
Your help will be very appreciated:-)
Thanks^_^
Winnie
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Aug 16, 2000
Hi,
I was wondering if anyone knew where I could find good information on performing a database cache. I want to cache tables and run queries from them within a Cold Fusion Application.
Thanks.
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May 29, 2007
Is there a simple way to tell when a database was last accessed or changed?
We have some databases on old servers which we would like to discontinue but do not know if they are being used.
We would rather not just take them offline.
Is there anyway I can find out if they are still being used?
Please help if you can.
Regards, Major (that is my Christian name ;-)
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Mar 8, 2001
How do i find who has changed the settings in the database.
basically when i looked at this morning i saw a database which is set in single user mode.when i tried to look at the errorlog i found nothing except the spid's of different people and as far as i know i think that spid's are assigned randomly depending on there availability.
Now this has happened twice recently and now i want to find out who the culprit is his username, machine name but not spid.
Can i do it if how can i.
how do i track each and every users info what he is doin and at what time.
do i need to set up or configure any options.
sometimes i also see that there is a dbcc command run by as it says winnt/system what does this mean how is this running.
Thanks in advance for ur great help.
Its very urgent because its a production machine.
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Jan 13, 2005
I am in a bind here..
I am getting the message (after do any sort of query) Database context changed to <dbname> I am using PHP as the p language.
Does anyone have any clue on why it is doing that..
Recently my host upgraded there PHP to version 4.3.10 and before the upgrade the queries were working fine.
Im on a windows server that runs PHP and im using a MSSQL database.
I've checked the bug reports on PHP and didn't come up with anything as well as googling the error..
IF you have any insite on this problem please let me know.. It may be a stupid error that I am overlooking on my part.
Thanks in advance
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Sep 27, 2007
Hi All,
I am designing database where few of the master tables will reside in different database or in case different server. Scenario is
Server "A" with Database "A" may host the "Accounts" table.
Server "B" with Database "B" may host the "Product" table.
I am designing database "Project" which will hosted in Server "A".
My application requires this master tables [readonly access] as data inserted in my application refers this tables. Also there are reports to be generated which refer this tables.
How do i design my database and sql queries?
I am thinking of approach of having equivalent tables created in my database and writing service which keep tables in my database in sync. This will ensure good perfomance during transaction and reports as they will need to refer this table locally as opposed to different database or different server.
Any thoughts on above approach?? or any better/standard way for such scenarios ?
Thanks in Advance. Your inputs will be of great help.
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Apr 12, 2007
Hello:
My client has a db with the following structure:
Online US Searchable Map of the 50 US States. Users search criteria is the following: Query records by selecting state, county, then record. Each County table has 10-20 tables. All databases combined = 500MB and TLogs = 100MB.
How would you re-design a relational DB where users could query data by state-county-record. Currenty the DB's are created by the County of each state which creates hundreds of DB's in SQLServer with no realtionship to each US state. What would be the best design to ensure good performance, data integrity and maintenance? Would you create 1 DB with all 50 states, create 4 DB's and divide by region(N,S,E,W), 50 DB's of each state or leave it as is with each county it's on DB? Any suggestions would be appreciated.
thx
rob
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May 4, 2004
Dear all,
I wasn't able to connect to my SQL server 2000 database (which reside in the network in a windows 2003 server) after the IP address of the server has changed and the server is shut down, moved and re-started.
I was able to connect to this server by using ADO using VB. I was able to register this server in my EM and was able to create ODBC connection. Just when using ADO.NET, I wasn't able to connect. Any ideas? Will there be any caching within ADO.NET still pointing to the old IP address?
Thank you for all the help in advance.
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Sep 28, 2015
We are troubleshooting a performance problem and the test result is slow the 1st time but the subsequent runs are faster.. Logging out of application and log back in ( connecting to a new database session) did not clear the buffer cache as I thought it would.. When does the database clear the buffer cache? Is it not per database session?
I can issue CHECKPOINT and then run DBCC DROPCLEANBUFFERS to clear the buffers in the disk. But since we are testing from the application,do we need to run these commands via application code to clear buffer/per database session OR can we run these commands from a management studio session?
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Sep 15, 2005
I do weekly full backups of my SQL databases via a scheduled T-SQL job.I noticed that I have some static databases that dont normally change,so I dont want to back it up if it has not changed, but when it does,then I want a backup.Is there something in the master table, as example, that I can checkprior to running the backup that will indicate any changes?An example is the Northwind database. I could exclude it from thebackup, but then I would not back it up if it where to change. Againthis is an example, I would not need to modify Northwind.Thanks in advance for any ideas; they usually give me ideas to problemsyet to come....Rob Camarda
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Jul 20, 2005
Hi all,We're looking at a vendor who uses the InterSystems Cache DatabasePlatform, but our IT department has zero experience with this system.This software package will have a pivotal and mission critical roll inour organization, so I'd like some comments on what others think ofthis database platform.Mainly I'm curious how easy/difficult it is to query a Cache Database,and does it use standard SQL calls like Oracle and MS SQL? What aboutODBC connections into the database from Crystal, MS Access, and OLAPtools? Any other caviets (backup, maintenance, etc)?Thanks in advance for any suggestions or comments Cache.Sam
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May 13, 2015
I have a scenario like below
Product1
Product2 Product3
Product4 Product5
Product1 1
1 0 0
1
Product2 1
1 0 0
1
Product3 0
0 1 1
0
Product4 0
0 1 1
0
Product5 1
1 0 0
1
How to design tables in SQL Server for the above.
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Dec 12, 2006
Dear Friends,
I want your help to know the best way to cache the data of a dropdownbox returned by a SQL Query.(SELECT FIELD FROM DBO.TABLE)
This data returned by database is used in more than one dropdown on multiple pages. I want to cache only the dropdown control, not the entire page. Which is the best way to do it? The data isn't refreshed often, probably once per month.
Could you tell me the best way?
THANKS
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Oct 30, 2015
We had a strange incident with our Database Mail today. We use sp_send_DBMail to send mail from stored procedures in our SQL Server 2012 (11.0.2138). There are 7 profiles available for use by different databases. The actual stored procedures are called by Web apps using a connection string that has a specific SQL user identified.
Last night app 1 was using profile 1 like usual and app 3 was using profile 3 like usual. This this morning (7 hours later) App 3 was sending from profile 1 everytime a call to sp_send_dbmail was made. Not good. App 1 was still correctly sending from profile 1.
We ran a call to sp_send_dbmail from a query window using profile 3 and it sent using the correct profile 3. We used the Database Mail right-click option of "Send Test Email..." to both profiles and they worked as expected.
Our investigation showed that in the Database Mail configuration wizard "Manage Profile Security" section Private Profiles tab... the User name that is used to call the stored procedures from web app 3's sp_send_DBMail did not have access to profile 3 anymore. It did have access to 5 of the other 7 profiles. 1 of the no access profiles was legitimate #7.
The only thing that has been changed lately was, 2 days ago a mail profile was deleted as it was no longer used. We used the Database Mail Configuration Wizard to remove it.
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Apr 21, 2015
I have an online SQL Server database, and my web site registered clients can change the records of this database. My need: if a record of this database is changed, whole the changed record send to me and to the person who changed it immediately. I thought it could be possible through Transact-SQL,
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Sep 25, 2007
Hello I am a final year student and for my final year project I have decided to try and create a price comparison website due to the fact that i feel it would be a good project to work on and develop my technical skills in C# and microsoft sql server 2005, since these are mainly the two programs I would say i have more experience with. Basically I want to create a website such as www.pricerunner.com. At this point in time i have started playing around with how i feel the database will look, in terms of tables and columns, below is what i have produced;
Company
Company_ID
Company_name
ADDRESS
Website link
contact
Products
Product_ID
Product_name
Product_Category
Product_Price
I am now stuck as how i will link each company with a product bearing in mind a company will stock different categories of products, also do you think i need any more columns in any of the above tables, as well as am i missing out on anything, I am hoping someone with more knowlegde than myself can shed some knowledge on my problem, thank you.
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Aug 10, 2005
I'm sure there is a simple way to do this but I cannot think of it.I have an ASP.NET application that I am publishing to a webhost. I have chosen to use FTP to copy my files (aspx, etc.). They work as far as links etc. Now, the next step is to create my SQL database on their server as they instruct, which I have done in name only. (Oh, if it makes a difference, I access the hosting service using Plesk control panel.) Is there any simple way to get my database structure from my PC to the host server? All responses welcome. Thanks.
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Oct 9, 2001
Hi All,
I need to get some info on how I can get the script of the entire database stucture. I need to write a procedure to do this. I know in SQL Server I could get the script in a mouse click. But I need to write a procedure to do the task. Is there a package in SQL Server that I could use to accomplish this task?
Any thoughts will be of help.
Thanks in advance.
sj
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Sep 2, 1999
I am very new to SQL server, and am completely stumped here. I need to transfer the data from an old database to a new one (both SQL Server 6.5 DBs.) The only problem is that the database has been restructured, and I can't for the life of me figure out how to get the data imported. I am working on manually making all of the structure changes, but there must be a better way. Any ideas? Thank you SO much!
Jeff
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