How do I know if there is a duplicate value in database

hello, i am creating a user login system. When people register for the site I need a way for sql to check weather or not their is a duplicate username already in the databse. Currently, I am going through the whole member profile table searching for a duplicate name. Is there a better way to do this?i am not sure how u r performing the check and what is bothering u. however, u can create a unique index on that field and fire the insert without any check. a duplicate value will produce an error.|||Currently, I am going through the whole member profile table searching for a duplicate name. Is there a better way to do this?
If for some strange reason the unique index (actually this should be the primary key) is not an option for you, why do you "go through the whole table"?.
A simple

SELECT couint(*) from user_profile WHERE username = 'input_value';

will also tell you if there is another row with that username.|||hello, i am creating a user login system. When people register for the site I need a way for sql to check weather or not their is a duplicate username already in the databse. Currently, I am going through the whole member profile table searching for a duplicate name. Is there a better way to do this?

SELECT username, count(*)
FROM tblLogins
GROUP BY username
HAVING COUNT(*) > 1|||INSERT INTO Table(Collist) SELECT values
SELECT @.error = @.@.ERROR
IF @.@.ERROR <> 0
BEGIN
Error Handling|||hmmmm..so which way is the fastest and most efficient?|||I'd say the most efficient would be the unique index (or primary key) option, because, with correct error handling, not only can you prevent the problem from occurring, you can also provide a meaningful error message to users.sql

How do i hide my db schema from...

everybody except 1 login which is non-sa in sql server 2000.
Even sa should not be able to access the schema.
Also are there anyways encrypt data in sql server 2000You don't. Answer in .server, but it is not much longer than this one.
"w" <wilcorning@.hotmail.com> wrote in message
news:6a24cdf7.0402261136.176d7b10@.posting.google.com...
> everybody except 1 login which is non-sa in sql server 2000.
> Even sa should not be able to access the schema.
> Also are there anyways encrypt data in sql server 2000|||There are several third party products that will encrypt the data. A google
search should bring up several.
Cindy Gross, MCDBA, MCSE
http://cindygross.tripod.com
This posting is provided "AS IS" with no warranties, and confers no rights.

How do I get a user's domain?

I need to provide a UI to get the information to add a windows login to a SqlServer database. The CREATE LOGIN Sql statment requires the user name as "DomainName\UserName". I can get a list of users in XML using the following code:

public static XmlDocument GetAllADDomainUsers(string DomainPath)
{
string domain;
XmlDocument doc = new XmlDocument();
doc.LoadXml("<users/>");
XmlElement elem;

DirectoryEntry searchRoot;

ArrayList allUsers = new ArrayList();

if (DomainPath.Length == 0)
{
DirectoryEntry entryRoot = new DirectoryEntry("LDAP://RootDSE");
domain = entryRoot.Properties["defaultNamingContext"][0].ToString();
}
else
domain = DomainPath;

searchRoot = new DirectoryEntry("LDAP://" + domain);

DirectorySearcher search = new DirectorySearcher(searchRoot);
search.Filter = "(&(objectClass=user)(objectCategory=person))";
search.PropertiesToLoad.Add("samaccountname");
search.PropertiesToLoad.Add("distinguishedname");
search.Sort.PropertyName = "samaccountname";
search.Sort.Direction = SortDirection.Ascending;

SearchResult result;
SearchResultCollection resultCol = search.FindAll();
if (resultCol != null)
{
for(int counter=0; counter < resultCol.Count; counter++)
{
result = resultCol[counter];
if (result.Properties.Contains("samaccountname"))
{
elem = doc.CreateElement("user");
doc.DocumentElement.AppendChild(elem);
elem.SetAttribute("name", (String)result.Properties["samaccountname"][0]);
elem.SetAttribute("distinguishedName", (String)result.Properties["distinguishedname"][0]);
}
}
}
return doc;
}

This works for listing the names but how do I get the NetBIOS domain name for a selected user as required by SqlServer? I have tried using TranslateName from secur32.dll. That works on some machines but for some reason on other machines, it returns a blank. Is there another way?

Thanks for your help,
Rob

Is this the right one you are looking for? Try System.Environment.UserDomainName .|||

System.Environment.UserDomainName gets the domain of the current user. However, I need to be able to get the domain of a user that could come from any of multiple domains instead of the current user and I also need to support version 1.1 of .Net Framwork which makes it more difficult...unless I'm missing something.

Any ideas?

Thanks,
Rob

How do I determine if SQL Sever Login is disabled using T-Sql?

How do I determine if SQL Sever Login is disabled using T-Sql?
I can disable it and enabled it using the following T-Sql function:
ALTER LOGIN login [ENABLE | DISABLE]
I just want to know if it is enable or disabled?It's stored in the system table sys.server_principals, in the column called
is_disabled
However, in SQL Server 2005 system tables are not visible by default; you
must use the Dedicated Administrator Connection (DAC) which you can read
about in the Books Online.
--
HTH
Kalen Delaney, SQL Server MVP
<rodrigo.gloria@.gmail.com> wrote in message
news:1156370327.654473.140550@.p79g2000cwp.googlegroups.com...
> How do I determine if SQL Sever Login is disabled using T-Sql?
> I can disable it and enabled it using the following T-Sql function:
> ALTER LOGIN login [ENABLE | DISABLE]
> I just want to know if it is enable or disabled?
>|||Hi,
You can also query the system view and look into column is_disabled.1
denotes the login is disabled
select * from sys.sql_logins
Tahnks
Hari
SQL Server MVP
<rodrigo.gloria@.gmail.com> wrote in message
news:1156370327.654473.140550@.p79g2000cwp.googlegroups.com...
> How do I determine if SQL Sever Login is disabled using T-Sql?
> I can disable it and enabled it using the following T-Sql function:
> ALTER LOGIN login [ENABLE | DISABLE]
> I just want to know if it is enable or disabled?
>|||Thanks Hari. I totally blew that answer. I was doing some testing, and was
in a connection that was not a sysadmin, just a regular user. So when I
couldn't see server_principals, I assumed it was because it was a system
table.
Then of course logging in using the DAC, I was sysadmin, so I could see that
view.
So sys.server_principals is the answer.
If you check the BOL for sys.sql_logins, you'll see that it is a view based
on sys.server_principals, containing all the columns from that view, plus a
view others.
--
HTH
Kalen Delaney, SQL Server MVP
"Hari Prasad" <hari_prasad_k@.hotmail.com> wrote in message
news:OLo8wkxxGHA.2168@.TK2MSFTNGP06.phx.gbl...
> Hi,
> You can also query the system view and look into column is_disabled.1
> denotes the login is disabled
> select * from sys.sql_logins
>
> Tahnks
> Hari
> SQL Server MVP
> <rodrigo.gloria@.gmail.com> wrote in message
> news:1156370327.654473.140550@.p79g2000cwp.googlegroups.com...
>> How do I determine if SQL Sever Login is disabled using T-Sql?
>> I can disable it and enabled it using the following T-Sql function:
>> ALTER LOGIN login [ENABLE | DISABLE]
>> I just want to know if it is enable or disabled?
>|||Kalen Delaney wrote:
> Thanks Hari. I totally blew that answer. I was doing some testing, and was
> in a connection that was not a sysadmin, just a regular user. So when I
> couldn't see server_principals, I assumed it was because it was a system
> table.
> Then of course logging in using the DAC, I was sysadmin, so I could see that
> view.
> So sys.server_principals is the answer.
> If you check the BOL for sys.sql_logins, you'll see that it is a view based
> on sys.server_principals, containing all the columns from that view, plus a
> view others.
> --
> HTH
> Kalen Delaney, SQL Server MVP
>
> "Hari Prasad" <hari_prasad_k@.hotmail.com> wrote in message
> news:OLo8wkxxGHA.2168@.TK2MSFTNGP06.phx.gbl...
> > Hi,
> >
> > You can also query the system view and look into column is_disabled.1
> > denotes the login is disabled
> >
> > select * from sys.sql_logins
> >
> >
> >
> > Tahnks
> > Hari
> > SQL Server MVP
> >
> > <rodrigo.gloria@.gmail.com> wrote in message
> > news:1156370327.654473.140550@.p79g2000cwp.googlegroups.com...
> >> How do I determine if SQL Sever Login is disabled using T-Sql?
> >>
> >> I can disable it and enabled it using the following T-Sql function:
> >>
> >> ALTER LOGIN login [ENABLE | DISABLE]
> >>
> >> I just want to know if it is enable or disabled?
> >>
> >
> >
Thank you very much.

How do I determine if SQL Sever Login is disabled using T-Sql?

How do I determine if SQL Sever Login is disabled using T-Sql?
I can disable it and enabled it using the following T-Sql function:
ALTER LOGIN login [ENABLE | DISABLE]
I just want to know if it is enable or disabled?It's stored in the system table sys.server_principals, in the column called
is_disabled
However, in SQL Server 2005 system tables are not visible by default; you
must use the Dedicated Administrator Connection (DAC) which you can read
about in the Books Online.
HTH
Kalen Delaney, SQL Server MVP
<rodrigo.gloria@.gmail.com> wrote in message
news:1156370327.654473.140550@.p79g2000cwp.googlegroups.com...
> How do I determine if SQL Sever Login is disabled using T-Sql?
> I can disable it and enabled it using the following T-Sql function:
> ALTER LOGIN login [ENABLE | DISABLE]
> I just want to know if it is enable or disabled?
>|||Hi,
You can also query the system view and look into column is_disabled.1
denotes the login is disabled
select * from sys.sql_logins
Tahnks
Hari
SQL Server MVP
<rodrigo.gloria@.gmail.com> wrote in message
news:1156370327.654473.140550@.p79g2000cwp.googlegroups.com...
> How do I determine if SQL Sever Login is disabled using T-Sql?
> I can disable it and enabled it using the following T-Sql function:
> ALTER LOGIN login [ENABLE | DISABLE]
> I just want to know if it is enable or disabled?
>|||Thanks Hari. I totally blew that answer. I was doing some testing, and was
in a connection that was not a sysadmin, just a regular user. So when I
couldn't see server_principals, I assumed it was because it was a system
table.
Then of course logging in using the DAC, I was sysadmin, so I could see that
view.
So sys.server_principals is the answer.
If you check the BOL for sys.sql_logins, you'll see that it is a view based
on sys.server_principals, containing all the columns from that view, plus a
view others.
--
HTH
Kalen Delaney, SQL Server MVP
"Hari Prasad" <hari_prasad_k@.hotmail.com> wrote in message
news:OLo8wkxxGHA.2168@.TK2MSFTNGP06.phx.gbl...
> Hi,
> You can also query the system view and look into column is_disabled.1
> denotes the login is disabled
> select * from sys.sql_logins
>
> Tahnks
> Hari
> SQL Server MVP
> <rodrigo.gloria@.gmail.com> wrote in message
> news:1156370327.654473.140550@.p79g2000cwp.googlegroups.com...
>