Certificates Versus Keys
Jul 14, 2005Hi,
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Composite Primary Keys Versus Composite Unique Indexes
Feb 20, 2007Hello,
I have a table which has a composite primary key consisting of four columns, one of them being a datetime called Day.
The nice thing afaik with this composite key is that it prevents duplicate entries in the table for any given day. But the problem is probably two-fold
1. multiple columns need to be used for joins and I think this might degrade performance?
2. in client applications such as asp.net these primary keys must be sent in the query string and the query string becomes long and a little bit unmanagable.
A possible solutions I'm thinking of is dropping the existing primary key and creating a new identity column and a composite unique index on the columns from the existing composite key.
I would like to have some tips, recommendations and alternatives for what I should do in this case.
Creating Inter-table Relationships Using Primary Keys/Foreign Keys Problem
Apr 11, 2006Hello again,
I'm going through my tables and rewriting them so that I can create relationship-based constraints and create foreign keys among my tables. I didn't have a problem with a few of the tables but I seem to have come across a slightly confusing hiccup.
Here's the query for my Classes table:
Code:
CREATE TABLE Classes
(
class_id
INT
IDENTITY
PRIMARY KEY
NOT NULL,
teacher_id
INT
NOT NULL,
class_title
VARCHAR(50)
NOT NULL,
class_grade
SMALLINT
NOT NULL
DEFAULT 6,
class_tardies
SMALLINT
NOT NULL
DEFAULT 0,
class_absences
SMALLINT
NOT NULL
DEFAULT 0,
CONSTRAINT Teacher_instructs_ClassFKIndex1 FOREIGN KEY (teacher_id)
REFERENCES Users (user_id)
)
This statement runs without problems and I Create the relationship with my Users table just fine, having renamed it to teacher_id. I have a 1:n relationship between users and tables AND an n:m relationship because a user can be a student or a teacher, the difference is one field, user_type, which denotes what type of user a person is. In any case, the relationship that's 1:n from users to classes is that of the teacher instructing the class. The problem exists when I run my query for the intermediary table between the class and the gradebook:
Code:
CREATE TABLE Classes_have_Grades
(
class_id
INT
PRIMARY KEY
NOT NULL,
teacher_id
INT
NOT NULL,
grade_id
INT
NOT NULL,
CONSTRAINT Grades_for_ClassesFKIndex1 FOREIGN KEY (grade_id)
REFERENCES Grades (grade_id),
CONSTRAINT Classes_have_gradesFKIndex2 FOREIGN KEY (class_id, teacher_id)
REFERENCES Classes (class_id, teacher_id)
)
Query Analyzer spits out: Quote: Originally Posted by Query Analyzer There are no primary or candidate keys in the referenced table 'Classes' that match the referencing column list in the foreign key 'Classes_have_gradesFKIndex2'. Now, I know in SQL Server 2000 you can only have one primary key. Does that mean I can have a multi-columned Primary key (which is in fact what I would like) or does that mean that just one field can be a primary key and that a table can have only the one primary key?
In addition, what is a "candidate" key? Will making the other fields "Candidate" keys solve my problem?
Thank you for your assistance.
Creating Indexes On Columns That Are Foreign Keys To Primary Keys Of Other Tables
Jul 16, 2014what the best practice is for creating indexes on columns that are foreign keys to the primary keys of other tables. For example:
[Schools] [Students]
---------------- -----------------
| SchoolId PK|<-. | StudentId PK|
| SchoolName | '--| SchoolId |
---------------- | StudentName |
-----------------
The foreign key above is as:
ALTER TABLE [Students] WITH CHECK ADD CONSTRAINT [FK_Students_Schools]
FOREIGN KEY([SchoolId]) REFERENCES [Schools] ([SchoolId])
What kind of index would ensure best performance for INSERTs/UPDATEs, so that SQL Server can most efficiently check the FK constraints? Would it be simply:
CREATE INDEX IX_Students_SchlId ON Students (SchoolId)
Or
CREATE INDEX IX_Students_SchlId ON Students (SchoolId, StudentId)
In other words, what's best practice for adding an index which best supports a Foreign Key constraint?
X.509 Certificates
May 3, 2006
With the new functionality provided by sql server 2005, can we use the certificate functionality to act as a db store for third party certificates. Posts that I have seen so far indicate that there is no direct access to the certificate store once a certificate has been imported to the db. Given that the database is more portable (for failover purposes for certificate storeage, lack of access to the certificate store should be considered a considerable problem for ISV's.
Failing that, if we need to impliment this functionality ourselves what is the best format to store certificates in the database (blob or other)
thanks
Mike
SQLexpress Certificates
Sep 29, 2006Hello:
I have access to a microsoft certificate server and I have generated a server certificate for use in my SQLexpress installation. The certificate was installed into the personal folder of the local machine. The MMC certificate snap in can see it fine.
When I use the SQL server configuration manager and look in the certificate tab and try to use the drop down to find the certificate so SQL express can use it, nothing shows up.
Can someone please give instructions on how I can get SQl express to use the server certificate that I just installed?
Thanks.
Larry
Wildcard Ssl Certificates?
Apr 27, 2007Does SQL Server support wildcard Certificates. When you install the wild cert in the certificate store, the sql configuration manager does not see it in its drop down list. Id it does, what are the steps or please point me to the right direction. Does the cert need to be specifically for that particular hostname. Thanks
View 1 Replies View RelatedLive Of Certificates
Apr 17, 2008I am looking for a good introduction into the handling of certificates in SQL 2005.
I need to sign a procedure to allow it to access a dm view.
I do understand the theory and the syntax, but I have trouble coming up with an easy but still secure way to create these certificates on all customer servers without allowing misuse.
All articles I could find are going through creating a new database, setting up a certificate with or without password, signing an example proc and then dropping the database.
Non seems to care about the problems that occur later on during the life of a certificate.
Thanks
Generate Script For Primary Keys And Foreing Keys
May 16, 2008
Pls let me know How I generate script for All primary keys and foreign keys in a table. Thereafter that can be used to add primary keys and foreign keys in another databse with same structure.
Also how I script default and other constraints of a table?
Students Who Have 3 Certificates (was Need Help In SQL Query)
Aug 11, 2005Hi,
I want to get all the student from a Database table which store student certificate. For example, I need a query of student who "HAVE" 3 certificate(Cert A, B, C).
Certificate Table:
StudentName CertificateName
John Cert A
Wilson Cert B
John Cert B
John Cert C
Michael Cert A
Output:
John
sqlQuery = "Select * from CertificateTable Where (CertificateName = 'Cert A') AND (CertificateName = 'Cert B') AND (CertificateName= 'Cert C')"
This is my query, but it not works.
Calvin
Replication With SSl And Wildcard Certificates
Dec 8, 2006
Need to replicate mobile device that uses a wildcard certificate. Heard that ms windows mobile 5.0 does not support wildcard certificates. Is there a solution around this using vb.net.
https://myrep.domain.com/dbname/sqlcesa30.dll
Microsoft CF 2.0
Microsoft SQL Mobile 2005
Microsoft SQL Mobile 2005 Replication
Certificates For Endpoint Authentication
Mar 10, 2008Hi There
I just want to be 100% sure about something.
Certificates generated for use with service broker endpoints must be generated in the maste database, correct?
What are the implecations of the master key is changed for the master database ?
Thanx
Certificates Expiration Date
Jul 24, 2006Hi There
This may seem like a stupid question but i am trying to get the hang of the new security model.
I have not really heard anything mentioned about certficate expiration date when it comes to creating certificates for keys or service broker endpoints etc.
We have created certificates for keys and service broker endpoints, now what exactly happens when the expiration date, by default 1 year i think is reached, will we no longer be able to decrypt encrypted data and will the service broker endpoints stop working etc ?
Or is this expiration date when the certificate can no longer be used to create security objects ? And all security objects already created with this certificate will always work ?
In other words is there ever danger that keys and endpoints or basically any object referrencing this certificate will just suddenly stop working one day, or will all objects work indefinately regardless of an certificate/objects expiration date ?
Thanx
Mirroring Problem Using Certificates ( Between LAN And DMZ )
Nov 20, 2006Hello Guys,
Here it is my scenario;
My principal server in LAN and my mirror server in DMZ and Iam using certificates both partners (I dont use witness server).
I did not use wizard.I have just Setting Up Database Mirroring Using Certificates (Transact-SQL)
(http://msdn2.microsoft.com/en-us/library/ms191140.aspx)
Iam sure all steps are ok!(I mean ports,certificates,users,logins,endpoints,GRANT CONNECT ON ENDPOINT,SP1....)
But I am still getting error Principal Server;
Database mirroring connection error 4 'An error occurred while receiving data: '64(error not found)'.' for 'TCP://195.xx.yy.zz:5022'.
Also,Mirror Database status changed (Restoring---->In Recovery)
I tried many tests but I did not succeed.Do you have any ideas in this case or any experince in database mirroring using certificates.
Many thanks for your reply...
Regards..
Tarkan G.
Urgent !!!!! Nee Explanation On Primary Keys And FK Keys
Jul 15, 2002Can somebody explain to me how to best do inserts where you have primary keys and foreign keys.l'm battling.
Is there an article on primary keys/Pk ?
Foreign Keys - On Which Kind Of Keys Do The Base On?
Nov 22, 2007Hello!I have a table A with fields id,startdate and other fields. id and startdateare in the primary key.In the table B I want to introduce a Foreign key to field id of table A.Is this possible? If yes, which kind of key I have to build in table A?Thx in advance,Fritz
View 6 Replies View RelatedClient Certificates With SQL Mobile Replication
Dec 5, 2006I am currently trying to replicate a SQL Mobile 2005 database with a SQL Server 2005 database through web synchronization using SSL Server AND Client Certificates. On IIS, with "Require Client Certificates" unchecked, I can replicate fine. Once I turn it on, I get a message from replication saying "A Secure Socket Layer connection is required to access this site". I have installed a client certificate in IE, and can access the https://servername/Ojt/sqlcesa30.dll site (I tried removing the client certificate, and I was denied access, then reinstalled it and it worked - so I think that part is working). Does anyone have any experience with this? My production operating environment requires client-side certificates.
View 5 Replies View RelatedCreation Of Credentials And Certificates To Protect A DB
Jun 22, 2006Hi, i want to know if its posible to create credentials or certificates in order to protect a SQL 2005 data base.
Because if someone Buckups one of my DBs from my server, and try to restore it in orther server i dont want they to see my DB information because he dont have the correct credentials or certificates for it.
This is posible?. if is, How i do it ?
Best Regards.
Cant Get Two Servers To Connect With Certificates Kb 915852
Mar 14, 2007I am trying to use the example in http://support.microsoft.com/kb/915852. This creates two databases SourceDB and TargetDB. If I put SourceDB on the same SQL Server instance as TargetDB, the messages is received with no problem. If I put the SourceDB on another Server so than I am using two separate servers in the same domain, the message never gets to the TargetDB. I have changed the routes to the correct server names and set the route port to 8286.
CREATE ROUTE [myRoute]
WITH
SERVICE_NAME = 'SourceService',
address = 'TCP://toto:8286';
and:
CREATE ROUTE [myRoute]
WITH
SERVICE_NAME = 'TargetService',
address = 'TCP://devbox05:8286';
My SourceDB is on one of several instances on the server toto. My instance is totofoxylady01,52005.
The certificates were generated using the passwords in the article.
Using Service Broker To Send Certificates
Jun 18, 2007Hi,
The project I'm currently working on has to be relatively simple for the users to install, so I had the idea of using service broker to "set itself up". The idea is that there will be a server with a service and suchlike already set up. Somehow the clients will get the information required to create a remote service binding, and once that has been accomplished will send a registration message to the server.
What I'm wondering is can I somehow create and send a certificate using service broker via t-sql, and also is this approach reasonable or is it a bad idea. The reason I had thought of something like this is because the people setting up the client sites may (and probably will) have very little knowledge (probably no sql server knowledge) so we need the installation to basically be a click and install.
Thanks in advance,
Adam
SQL Server 2008 :: Export / Import TDE Certificates
Oct 14, 2015Any way to bulk export / import TDE Certs? I've got a bunch of databases that need to be moved to another system. Just about every database is using TDE and was wondering if there was a way to move these certs in a bulk fashion. I've got SQL and Powershell scripts to backup and restore multiple databases, but won't do me any good without the certs.
View 0 Replies View RelatedNo Certificates Available In The Protocols For MSSQKSERVER Properties Window
Apr 4, 2007I am trying to set up SQL Server 2005 to use a test certificate from Thawte for SSL encryption. I have installed the certificate in the local computer, current user and service account's personal certificates folders. I have also installed the root certificate in the Trusted Root Certification Authorities folders of each. All this was done using MMC.
However, when I go to tell SQL Server to use the certificate, no certificates show up in the drop down box. I am using SQL Server Configuration Manager and doing the right-clickPropertiesCertificate steps shown in multiple KB and forum articles.
I have also checked the registry entry at HKEY_LOCAL_MACHINESOFTWAREMicrosoftMicrosoft SQL ServerMSSQL.1MSSQLServerSuperSocketNetLibCertificate. It is blank, which tells me SQL Server should be looking in the certificate store.
If I simply set the ForceEncryption flag, SQL Server starts up OK and generates a self-signed certificate. Using that, the session does get encrypted. However, I need to use a third party certificate.
I have hit a brick wall and am at a loss. Any help would be greatly appreciated.
Examples Of Certificates Created With Private Key And FROM EXECUTABLE FILE Options
Apr 4, 2006Hi
I am looking at documentation of CREATE CERTIFICATE statement. I am having hard time in understanding if I want to create CERTIFICATE with above mentioned options, how I am supposed to create either PRIVATE KEY file or EXECUTABLE file. any example would be really helpful for what I am doing here.
thanks
Satya
Auto Incremented Integer Primary Keys Vs Varchar Primary Keys
Aug 13, 2007Hi,
I have recently been looking at a database and wondered if anyone can tell me what the advantages are supporting a unique collumn, which can essentially be seen as the primary key, with an identity seed integer primary key.
For example:
id [unique integer auto incremented primary key - not null],
ClientCode [unique index varchar - not null],
name [varchar null],
surname [varchar null]
isn't it just better to use ClientCode as the primary key straight of because when one references the above table, it can be done easier with the ClientCode since you dont have to do a lookup on the ClientCode everytime.
Regards
Mike
@@ Versus @ In T-SQL
Apr 13, 2006I'm sorry to be ignorant on this point. It seems trivial, but what's the difference between @@ and @ when using variables in T-SQL? I have a developer that always uses @@ for local variables and @ for reference variables (meaning variables declared as parameters for a stored procedure or function).
Is that purely stylistic? Is it a holdover from some previous version? Or is it a legitimate best practice that I've not seen before?
My google-shui is weak today; I found nothing when searching.
Regards,
hmscott
SP2 Versus SP1
Feb 21, 2007Do you need SP1 installed before installing SP2?
http://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/servicepacks/sp2.mspx
SQL - SP1 Versus SP2
Apr 13, 2007Hi everybody. I am just confused. What is the difference between SQL SP1 and SP2 ? Can anyone explain further to me.
Thanks.
-Ron-
NOT EXISTS Versus NOT IN
Jan 30, 2004I have two tables :
tableA
a_id (int)
value (varchar 255)
tableB
id (int)
a_id (int)
b_id (int)
c_id (int)
d_id (int)
Both these tables contain considerable amounts of rows, but over time tableA will end up containing orphaned values (i.e. the a_id is not used in tableB) and this problem cannot be rectified by setting, for example, cascade deletes.
To fix this problem I decided to write a simple stored procedure to purge all values in tableA where its a_id is not used in tableB :
DELETE FROM tableA WHERE a_id NOT IN (SELECT a_id FROM tableB)
Now although the following document relates to postgres :
http://archives.postgresql.org/pgsql-sql/2003-12/msg00174.php
I was interested to find out if I should be wary of using NOT IN in my query.
SET Versus SELECT
Feb 12, 2007Hello,
I have an Output parameter as follows:
@Feedback INT OUTPUT
I want to give it a value and return it.
What is the difference between using:
SELECT @Feedback = -1
RETURN @Feedback
And
SET @Feedback = -2
RETURN @Feedback
Thanks,
Miguel
SSIS Versus DTS
Jun 20, 2007Hello,
I wonder if anyone else out there has the same impression that I have: I find that DTS works much better than SSIS.
I find that DTS is so easy to use and reliable: it gets the job done and fast! On the other hand, SSIS seems to be so needlessly complex that it takes hours of troubleshooting just to get it to work, and sometimes it doesn't work at all. For example I have just spent hours trying to get SSIS to import a flat file with 300,000 rows. It just crashes and doesn't even give an error message so that one can fix it. On the other hand I have just now successfully accomplished the same task with DTS and it took me 5 minutes!
I honestly don't see a valid reason for using SQL Server 2005 instead of 2000. So far it's much more productive to use 2000.
I hope Microsoft can clarify this issue.
Regards,
Jerome Smith
ADO.NET DATAVIEWS VERSUS SQL ENGINE
Jan 4, 2006Hi All,
Any suggestions / views / help on below question would be welcomed.
I am building an asp.net 2.0 application with sql 2005 express as back end. My back end has 3 major tables which are:
tblArticles - saves basic info on articles posted by user (like articleid, title, short desc, rating, views, etc)
tblCategories - saves various categories and their hierarchies (id, parented, name, etc)
tblArticleCategories - saves info on which articles fall in which categories (like articleid, categoryid)
as of now, i am caching all rows from the first 2 tables, but i am in a bit of doubt for caching the third table (tblArticleCategories), although data in this table wont change very often and also this table will just have 2 columns and not many rows as well and this is a good target for caching,
but the reason I am in a bit of doubt to cache this table is, when my website visitor clicks on any category link in the category tree view, I need to use an inner join across all these 3 tables to locate and return all articles found in that particular category.
But I can do the same thing without hitting the database as I already have 2 of the required 3 tables in my cache, I can simply add the third table to my cache and then using the dataview objects rowfilter property on these 3 cached tables, I can very well get the appropriate results.
But I wonder which of the 2 methods would you prefer and suggest, I mean do you feel that just to save hits against the database, I am going to far and doing a lot of crap using the dataview (which might not be as efficient as sql engine) or you feel that the inefficiency of the dataview will still win compared to the cost of hitting the database for this
Thanks in advance, bye take care
Raj Chaudhari, Mumbai, India (MCAD.NET)
www.xtremebiz.biz
Trigger Versus SQL Insert
Feb 16, 2006Hello all,
I have table 'statistics' which holds information about another table, i.e. number of rows belonging to each user.
Would I be better off using a trigger after each insert to increment a certain row.
Or would I be better off selecting the data by means of an sql statement and updating the column whenever the statisitcs page is requested.
Does sql provide any methods which allow a column to count other rows or columns?
SQL Server Versus Informix
Oct 25, 2000Hi all,
Anyone here ever used the Informix database and can give me some differences between Informix and SQL.
One of our users is thinking about purchasing a COTS product that only supports an Informix database. I need to convince the user to evaluate other rival applications that can support SQL and need some arguments in favor of not going with Informix.
Any ideas appreciated,
Faustina