Trusted Connections && Preventing Direct Db Access
Aug 29, 2007
Is there a way to use trusted connections in ASP.NET and WinForm applications yet prevent users from accessing databases directly (outside of applications) ? I know the use of trusted connections are recommended for several reasons however I have a lot of applications that I need to prevent users from accessing databases directly outside of the applications themselves.
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Oct 4, 2007
I have a user AD account SOPUSJSmith for example. I have given this account security admin at the SQL Server level and dbo at the database level. Is there any way to prevent them from using ODBC to pull data into an Access DB or an Excel spreadsheet?
Thanks in Advance - SOX is killing me!
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Apr 27, 2004
Hey all, not sure if this is even possible but is there a way to connection an SQL server with ASP.NET using my username and password as the trusted connection? As I am a trusted connection but the ASP.NET working process isnt. Anything can be done about this apart from addeing the ASP.NET account as a trusted connection?
Thanks
Luke
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Dec 14, 2005
I was just wondering about the old error:"user not associated with a trusted connection"I know how to solve it, but I dont really understand what im doing. If my connection string is like:Trusted_Connection=true;Initial Catalog=jobitdev;Data Source=192.168.109.4;Packet Size=4096;then how validation is done on the sql server side of things? If i specify the "Trusted_connection" property what does the server do to validate the user? I'm assuming that the user it checks is the current windows user?
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Oct 12, 2005
I am attemting to develop a link between a access and SQL2003 database on two different machines. The aim is to update information from a query within the access database to a table within the SQL2003 database - the stumbling block is that the SQL2003 database requires a user name and password to log into the database and append from the access database.
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Dec 2, 2005
seems a lot of people are having this problem but none of the solutions i tried has worked so far. I want to develop asp.net applications at my home pc running Win Xp pro SP2. I use MSDE as the database server and manage it with sql server enterprise manager. I do all the programming in Delphi 2005 and I run IIS 5.1, all on the same PC.
Now...if I build a test windows application and try to connect to the database with a connection object or UDL file, winnt authentication works. If I then try to connect through an asp.net application, where I have the connection string coded in the .aspx file I either get a "login failed" or "not trusted sql server connection". I have tried to set up login accounts on Enterprise manager both as winnt authentication or sql server authentication but none has worked with asp.net (no problem with windows apps). Funnilly I don't have that problem at work, though the sql server at the office is on a separate pc. I know many people face this problem, can anyone help me out?
thanx in advance
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Jan 3, 2001
i am attempting to bcp using the -T (trusted connection) option in sql 6.5. the login security mode is set to integrated. the bcp is however failing with msg 18452 error not associated with a trusted connection. why is this happening? i do not want to hardcode the sa password in the bcp command.
thanks
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Feb 19, 2001
Help!
I have rebuilt a very old sql server, and have managed to restore all databases etc.. and everything work okay logged in as sa, however if I try to link to it through odbc connections with the trusted connection option set I get a message like :
Login Failed User: Reason: Not defined as a valid user of a trusted SQL Server Connection.
Any suggestions?
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Dec 5, 2007
Hi,
How does one go about setting up a trusted connection to sqlserver 2005 so I don't have to put the username/password in the web.config file?
Are there any other adv/disadv. with doing this?
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Oct 9, 2007
I'm using MSSQL7, NT authentication and application roles so only my application can access the data. Also, other applications (like Excel) can not access the data and read it. So far, so good...
Yet, I noticed that if I try to access the SQL Server from another SQL Server on the network, it is allowed to see the list of tables, SP, etc. It is not allowed to open the table, but the Import/Export wizard is working and will allow retrieving data from the secured tables.
If I change to MSSQL authentication, any user will be able to access the data from my application and I don't want that either.
Unless I'm missing something, this is a big problem, especially today where any VPN connection with valid user name and password can actually log in to the domain and therefore connect to the database via SQL Server.
By the way, the server still must allow access to users via applications so logins must exist. I just don't want other SQL servers on the network to be able to connect to and import/export, view table and SP, etc.
Any ideas?
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Oct 10, 2007
I'm using MSSQL7, NT authentication and application roles so only my application can access the data. Also, other applications (like Excel) can not access the data and read it. So far, so good...
Yet, I noticed that if I try to access the SQL Server from another SQL Server on the network, it is allowed to see the list of tables, SP, etc. It is not allowed to open the table, but the Import/Export wizard is working and will allow retrieving data from the secured tables.
If I change to MSSQL authentication, any user will be able to access the data from my application and I don't want that either.
Unless I'm missing something, this is a big problem, especially today where any VPN connection with valid user name and password can actually log in to the domain and therefore connect to the database via SQL Server.
By the way, the server still must allow access to users via applications so logins must exist. I just don't want other SQL servers on the network to be able to connect to and import/export, view table and SP, etc.
Any ideas?
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Jun 28, 2001
Hello,
Does anyone know how to prevent a certain machine from accessing SQL server? We have users who use a generic username and password (i.e. one login for 15 users) and I need to prevent a certain machine (in a high risk location) from hitting my databases. Any ideas
Thanks for your time and help
Gurmi
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Feb 20, 2008
Hi €“
We have built a .NET on SQL Server application with extensive business functionality and security. It uses SQL integrated security to control logon and access to the database objects. There is business logic built into the .NET code, so I don€™t want any chance that users access the tables directly through a tool such as Management Studio - many users need update, delete, insert on tables in order to use the applications functions. With integrated security they can logon through SQL Management Studio and change data in the tables directly.
How are people who are using integrated security for their business applications preventing logons through unauthorized tools or applications?
Peter
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Dec 7, 2000
Does anyone know of a component or other mini application that can be run on the IIS server and allow IIS to access SQL Server 7 databases using Trusted Security.
Our security unit has required us to run SQL Server with Trusted Security so changing to Mixed mode is not an option. We are also not allowed to use Basic Authentication for Active Server Pages with IIS. IIS and SQL server are also on different machines.
We are looking into the possibility of trying to create a component that would run on the IIS machine to allow us to use Trusted Security to the SQL Server (in effect try to make it work the same way that the Cold Fusion product does).
Any help would be really appreciated.
Thanks
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Jan 19, 2005
hi at all, i know that in here there was a lot of thread over this argument, but none can helps me.
I'm newbie on sqlserver. I'm first installed an instance of SQL Server 2000 with enterprise manager.
As previous topics i cannot log into server because 'sa' user is not associated with a trusted connection. In installation time i selelected "windows only" authentication (because in mixed mode at end of installation i caught an error and installation was canceled). Now i **must** to connect with "sa" user, because i must to connect on sql server via jdbc driver from a java application. So i really cannot use windows authentication, but i must use sql authentication.
Someone, ***please*** (i'm really deprived of hope, i spent 1 entire day to install correctly server and client components!!!!), can guide me to configure my installed sql server instance to accept connections with sql authentication?
My sql server version is 8.00.194.
thank you at all!
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Jan 16, 2007
Being an IT consultant, I have to visit a number of customers having applications running on SQL Servers that implement trusted connection security model. In addition, all of these companies have their own DOMAIN settings, and security implementation.
How can I access to databases without changing the DOMAIN settings of MY notebook? I do not want them to switch to SQL security model, and I do not want to create any security hole in those companies.
What shall I want from the system administrator so that I can login into their domain without changing my domain settings?
Thanks,
EIO.
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Jul 23, 2005
I have two win2003 servers. One is IIS and the another is SQL server. Ican use MyConnection=newSqlConnection("server=SQLServerName;database=myDBName;UID=sa;PWD= mypwd")to access my data. But I can not use MyConnection=newSqlConnection("server=SQLServerName;database=myDBName;IntegratedSecurity=SSPI") to access it. If I put both IIS and SQL Server in onemachine, I can do anything. How can I do something to allow trustedauthority work ?Thanks
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Jun 27, 2007
I am unable to run a stored procedure that accesses a linked Oracle database as a dataset for a deployed report in Reporting Services. I receive the following error:
An error has occurred during report processing.
Query execution failed for data set 'spName'.
Access to the remote server is denied because the current security context is not trusted.
A few facts ...
The report previews fine in Microsoft Visual Studio 2005 Version 8.0.50727.762 (SP.050727-7600) report designer with VS being installed on my local machine and a shared data source referencing Server1
The deployed report on Server2 produces the error
The stored procedure code is similar to the following:
SELECT x.FieldName as OracleField
,y.FieldName as SSfield
FROM OracleLinkedServer..DatabaseName.TableName x
LEFT JOIN Server1.dbo.TableName y
The deployed report runs fine when the stored procedure code is changed as follows. This indicates to me that the problem is truly an Oracle connection issue;
SELECT 'ABC' as OracleField
,y.FieldName as SSfield
FROM Server1.dbo.TableName y
The Oracle database is a linked database on both SQL Server1 and on SQL Server2 database engines. (I don't see where in Server2 Reporting Services I can specify additional server connections.)
I've tried to trick Mr. Reporting Services on Server2 by creating a @L_TempTable in my stored procedure, inserting the data into it, then selecting from a SQL Server1.dbo.TableName LEFT JOIN @l_TempTable, but Server2 still knows I'm trying to get out to Oracle and rewards me with the error.
I can effectively run the Server1 stored procedure script on Server2 through MSSMS -- it's just the deployed report that references the stored procedure that doesn't work
The data source properties of the deployed report are as follows:
Select -- A Custom Datasource
Connection Type: Microsoft SQL Server
Connectoin String: Data Source=Server1;Initial Catalog=DatabaseName
Select -- Credentials stored securly in the report server
Username: UserName
Password: Password
Check -- Use as Windows credentials when connecting the the data source
Check -- Impersonate the authenticated user ...
(Please do not get sidetracked on the 'A Customer Datasource' selection above. I'd rather be using a shared data source, but right now, this is just the way it is.)
Anyone's expertise would be greatly appreciated. We have a great data warehouse but sometimes you just have to go back to the Oracle ERP and slug it out. What do I need to do to get a deployed report to effectively read from a stored procedure that references an Oracle table?
To everyone, thanks for reading!
~ Delora
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Aug 25, 2006
Hello,
In SQL 2005, from a stored procedure in a local database I am attempting to execute a remote stored procedure in another database on another server. I am getting the error referred to in the Subject when the local stored procedure tries to execute the remote stored procedure. A couple of comments:
The remote database is set up as a linked server in the local database. As part of the linked server definition I selected the 'be made using this security context', and provided a local user name and password.
The remote database is set to Trustworthy.
I have tried every combination of WITH Execute As on the remote stored procedure but nothing works.
I can query against the remote database successfully within Management Studio. I can even execute the remote stored procedure successfully from within M.S., but not from within my local stored procedure when it is run.
Thank you for your help on this - Amos.
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Jun 27, 2007
I am unable to run a stored procedure that accesses a linked Oracle database as a dataset for a deployed report in Reporting Services. I receive the following error:
An error has occurred during report processing.
Query execution failed for data set 'spName'.
Access to the remote server is denied because the current security context is not trusted.
A few facts ...
The report previews fine in Microsoft Visual Studio 2005 Version 8.0.50727.762 (SP.050727-7600) report designer with VS being installed on my local machine and a shared data source referencing Server1
The deployed report on Server2 produces the error
The stored procedure code is similar to the following:
SELECT x.FieldName as OracleField
,y.FieldName as SSfield
FROM OracleLinkedServer..DatabaseName.TableName x
LEFT JOIN Server1.dbo.TableName y
The deployed report runs fine when the stored procedure code is changed as follows. This indicates to me that the problem is truly an Oracle connection issue;
SELECT 'ABC' as OracleField
,y.FieldName as SSfield
FROM Server1.dbo.TableName y
The Oracle database is a linked database on both SQL Server1 and on SQL Server2 database engines. (I don't see where in Server2 Reporting Services I can specify additional server connections.)
I've tried to trick Mr. Reporting Services on Server2 by creating a @L_TempTable in my stored procedure, inserting the data into it, then selecting from a SQL Server1.dbo.TableName LEFT JOIN @l_TempTable, but Server2 still knows I'm trying to get out to Oracle and rewards me with the error.
I can effectively run the Server1 stored procedure script on Server2 through MSSMS -- it's just the deployed report that references the stored procedure that doesn't work
The data source properties of the deployed report are as follows:
Select -- A Custom Datasource
Connection Type: Microsoft SQL Server
Connectoin String: Data Source=Server1;Initial Catalog=DatabaseName
Select -- Credentials stored securly in the report server
Username: UserName
Password: Password
Check -- Use as Windows credentials when connecting the the data source
Check -- Impersonate the authenticated user ...
(Please do not get sidetracked on the 'A Customer Datasource' selection above. I'd rather be using a shared data source, but right now, this is just the way it is.)
Anyone's expertise would be greatly appreciated. We have a great data warehouse but sometimes you just have to go back to the Oracle ERP and slug it out. What do I need to do to get a deployed report to effectively read from a stored procedure that references an Oracle table?
To everyone, thanks for reading!
~ Delora
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Feb 10, 2014
We've got 3 SQL Servers all SQL Server 2012. We have a Master server and 2 production servers (let's call them A and B). The Master has linked servers defined for both A and B in an identical way.
A and B both have the same databases and each has a Stored Proc that gets called by the Master server.
An SQL Agent job executes the stored proc on both A and B.
It works fine against A but not B.
If we execute the stored proc in a query window under our windows account (domainowner) it works, if we use SetUser to pretend to be the SQL Server Agent account (let's call it domainagent) A works and B doesn't.
Executing against B returns the error "Access to the remote server is denied because the current security context is not trusted."
domainagent is a sysadmin on both Server A and B.
Trustworthy is set to ON in both the Master Server Database it's executing from and the remote databases on both A and B.
All 3 databases have the same owner (let's call it domainowner).
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Aug 25, 2006
Remus (or anyone who can help) -
I am sorry for posting this question here. The only reason I am doing so is because Remus answered a question similar to this late last year, but I couldn't get access to the whole thread.
In SQL 2005, from a stored procedure in a local database I am attempting to execute a remote stored procedure in another database on another server. I am getting the error referred to in the Subject when the local stored procedure tries to execute the remote stored procedure. A couple of comments:
a.. The remote database is set up as a linked server in the local database. As part of the linked server definition I selected the 'be made using this security context', and provided a local user name and password.
b.. The remote database is set to Trustworthy.
c.. I have tried every combination of WITH Execute As on the remote stored procedure but nothing works.
d.. I can query against the remote database successfully within Management Studio. I can even execute the remote stored procedure successfully from within M.S., but not from within my local stored procedure when it is run.
Thank you for your help on this - Amos.
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Sep 12, 2007
Hi,
I have a stored procedure servicing a queue (sql 2005).
The stored procedure updates some data in a different server and database.
If the queue contains messages and I execute manually the stored procedure, I don't have any problem at all.
However, if I set the queue to use the same stored procedure, it gives me the following error:
Error 15274: Access to the remote server is denied because the current security context is not trusted.
Any ideas?
Thanks,
Aron
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May 5, 2008
Hi 2 All,
I have installed MS SQL 2005 in my system. I have created one database in my server. When iam running my application with this connections it is working fine in my local system. When i uploaded the database to some where dataserver, Iam not getting the connectins due to no remote access .
Some body suggested that to start the SQL browser in the SQL Server Configuration Manager.
I go there n tried to start the service when i put the service properties to Automatic or Manual i am getting the error message that is saying that the service is disabled cannot start automatically.
What could be the wrong?
Please suggest me.
Thanks and regards,
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Sep 28, 2007
Hi,
We have the followoing:
-A "master domain" AD, a "sub domain" AD, a trust relationship between the two (sub trust master)
-A sql server 2005 on a win server 2003 in "sub domain" AD
-A linked server to "sub domain" AD
-A linked server login using a "sub domain" admin acccount
-A view to this linked server
-A grant on masterDomain/Domain Users to the database
-A grant on subDomain/Domain Users to the database
-We want all connections done through "Windows Authentication" not "Database Authentication".
Queries on the view work fine using "sub domain" user accounts.
Queries on the view fail using "master domain" user accounts (including master domain admin accounts)
"Msg 7399, Level 16, State 1, Line 1
The OLE DB provider "ADsDSOObject" for linked server "ADSI" reported an error. The provider indicates that the user did not have the permission to perform the operation."
All connections are done through "Windows Authentication" not "Database Authentication".
Can we establish cross domain connectivity with "Windows Authentication" ?
Below are details of the implementation:
SELECT TOP (100) PERCENT *
FROM OPENQUERY(ADSI,
'SELECT displayname, givenName, sn, cn (etc...)
FROM ''LDAP://OU=PEOPLE,DC=subDomain,DC=com''
WHERE objectCategory = ''Person'' AND objectClass = ''user'' ')
EXEC sp_addlinkedsrvlogin @rmtsrvname ='ADSI', @useself='false',
@rmtuser='subDomainAdminAccnt', @rmtpassword='sunDomainAdminAccntPassword';
In SQL Server Mngt Studio in Server Objects/Linked Servers/Providers/ ADSI properties security tab I have:
"connections will: <be made using this security context> Remote login:'subDomainAdminAccnt' With password: 'subDomainAdminAccntPassword'
Error:
Msg 7399, Level 16, State 1, Line 1
The OLE DB provider "ADsDSOObject" for linked server "ADSI" reported an error. The provider indicates that the user did not have the permission to perform the operation.
Msg 7320, Level 16, State 2, Line 1
Cannot execute the query "SELECT displayname, givenName, sn, cn
FROM 'LDAP://OU=PEOPLE,DC=subDomain,DC=com'
WHERE
objectCategory = 'Person'
AND objectClass = 'user'
" against OLE DB provider "ADsDSOObject" for linked server "ADSI".
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Sep 10, 2012
We have a SQL database that uses Active Directory with Windows Authentication. Can users that are members of the Active Directory group that has read/write access to the SQL database create ODBC connections to access the database directly and update the data? They dont have individual logins on the server. They are only members of the Active Directory group that has a login?
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Jul 4, 2007
1 ALTER PROCEDURE links_GetAllLinks
2 @startRowIndex INT,
3 @maximumRows INT,
4 @sortExpression nvarchar(50)
5 AS
6
7
8
9
10
11 SET @startRowIndex = @startRowIndex + 1
12 --SELECT @TopicsFrom = CASE @TopicsDays WHEN '1' THEN DATEADD(day,-1,getdate()) WHEN '2' THEN DATEADD(day,-7,getdate()) WHEN '3' THEN DATEADD(day,-14,getdate()) WHEN '4' THEN DATEADD(month,-1,getdate()) WHEN '5' THEN DATEADD(month,-3,getdate()) WHEN '6' THEN DATEADD(month,-6,getdate()) WHEN '7' THEN DATEADD(year,-1,getdate()) ELSE DATEADD(year,-1,getdate()) END
13 -- populate the table CAST(getdate() as int)
14
15
16 IF @sortExpression LIKE ''
17 BEGIN
18 SET @sortExpression = 'links_Links.link_date'
19 END
20 DECLARE @sql nvarchar(4000)
21 SET @sql = 'Declare @Links TABLE
22 (RowNumber INT,
23 link_id INT,
24 cat_id INT,
25 cat_title VARCHAR(100),
26 sub_id INT,
27 sub_name VARCHAR(100),
28 link_aproved BIT,
29 link_name VARCHAR(100),
30 link_url varchar(100),
31 link_desc varchar(500),
32 link_date datetime,
33 link_rating INT,
34 link_ratingscount INT,
35 link_ratingvalue INT,
36 link_poster uniqueidentifier,
37 link_comments INT,
38 hit_date datetime);INSERT INTO @Links
39 SELECT ROW_NUMBER() OVER (ORDER BY ' + @sortExpression + '), links_Links.link_id, links_Links.cat_id, links_Categories.cat_title, links_Links.sub_id, links_SubCategories.sub_name, links_Links.link_aproved, links_Links.link_name, links_Links.link_url, links_Links.link_desc, links_Links.link_date, links_Links.link_rating, links_Links.link_ratingscount, (links_Links.link_rating/links_Links.link_ratingscount) as link_ratingvalue, links_Links.link_poster, links_Links.link_comments, links_Links.hit_date
40 FROM links_Links INNER JOIN
41 links_Categories ON links_Categories.cat_id = links_Links.cat_id INNER JOIN
42 links_SubCategories ON links_SubCategories.sub_id = links_Links.sub_id
43 WHERE links_Links.link_aproved = 1;SELECT * from @Links
44 WHERE RowNumber BETWEEN ' + CONVERT(nvarchar(10), @startRowIndex) + ' AND (' + CONVERT(nvarchar(10), @startRowIndex) + ' + ' + CONVERT(nvarchar(10), @maximumRows) + ') - 1'
45
46
47
48 EXEC sp_executesql @sql
49
50
51 RETURN at row 39, i define a field by dividing to values. I use these for ratings (finding the mean). The problem is, when a new link is submited, it has no ratings, so it performs a divide by zero. how do I check if the column "link_ratingscount" is zero? if it is, then return a zero, and if it is not zero, then do the divide?
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Mar 25, 2003
Hi,
I have 2 jobs schedule to run after every alternate hour. Job A runs at 1 am, 3 am, 5 am etc. and job B runs at 2 am, 4 am , 6 am.
If job A is still running I would like Job B not to start at the scheduled time. How can I achieve this?
Thanks in Advance .... j
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Jan 21, 2007
I am building my first ASP.Net app from scratch and while working on the DAL I came across the problem of SQL Injection. I searched on the web and read different articles but I am still unsure about the answer. My question is should I add
db.AddInParameter(dbCommand, "AvatarImageID", DbType.Int32, avatarImageID);
Add in Parameters to my C# code to avoid SQL Injection. What is the best practice. I am unclear if the stored procedure already helps me avoid SQl Injection or if I need the add in parameters in the C# methods to make it work. I need some help. Thanks, Newbie
My C# update method in the DAL (still working on the code)
private static bool Update(AvatarImageInfo avatarImage)
{
//Invoke a SQL command and return true if the update was successful.
db.ExecuteNonQuery("syl_AvatarImageUpdate",
avatarImage.AvatarImageID,
avatarImage.DateAdded,
avatarImage.ImageName,
avatarImage.ImagePath,
avatarImage.IsApproved);
return true;
}
I am using stored procedures to access the data in the database.
My update stored proc
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[syl_AvatarImageUpdate]
@AvatarImageIDint,
@DateAddeddatetime,
@ImageNamenvarchar(64),
@ImagePathnvarchar(64),
@IsApprovedbit
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
BEGIN TRY
UPDATE[syl_AvatarImages]
SET
[DateAdded]= @DateAdded,
[ImageName]= @ImageName,
[ImagePath]= @ImagePath,
[IsApproved]= @IsApproved
WHERE[AvatarImageID] = @AvatarImageID
RETURN
END TRY
BEGIN CATCH
--Execute LogError SP
EXECUTE [dbo].[syl_LogError];
--Being in a Catch Block indicates failure.
--Force RETURN to -1 for consistency (other return values are generated, such as -6).
RETURN -1
END CATCH
END
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Jan 10, 2006
My problem is that the 'INSERT INTO' query that sends the records to thetable is dynamically compiled in VBA and and the target table has a twocolumn primary key. I have made a number of attempts at getting 'WHERENOT EXISTS' to cure the problem but so far without success and previouspostings have resulted in advice to create an 'ignore duplicates' index.This solved the problem in asmuch as it allowed the SQL to insert the records that did not alreadyexist but resulted in the message appearing every time the user ran thethe query. Whilst this is not a major problem it is vaguely irritatingand I would like to find a way to stop it happening. I suspect that thesolution may involve using the @@ERROR command but I am not sure of thesyntax.RegardsColin*** Sent via Developersdex http://www.developersdex.com ***
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Mar 2, 2006
My site has come under attack from sql injections. I thought I hadthings handled by replacing all single quotes with two single quotes,akaReplace(inputString, "'", "''")Alas, clever hackers have still managed to find a way to drop columnsfrom some of my tables. Can anybody direct me towards a best practicedocument on preventing these attacks?Thank you thank you,Kevin
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Nov 22, 2007
Using RS2000
I have a matrix control that is producing the data for my Row groups fine.
However, it is applying the "Hide Duplicate" rules when I don't want it to.
I have scanned the entire RDL file, running text searches against it to confirm that <HideDuplicates> does not exist anywhere in the file.
I have applied the "Hide Duplicates" rule, then removed it again but the matrix control appears to be doing its own thing.
Anybody able to shed some light on this please?
Thanks in advance,
Carl
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Aug 27, 2007
hi guys help please. I have a column name Quantity of type int in my table table1 and it has an intial value say 5. My question is, is it posible to update that column say, i want to add 10 from its initial value for it to have a value of 15, without querying it first from my application and store it to a varibale and add 10 to it for it to have 15 and execute update to set the initial to new value (15).
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