Codepolice.net » SQL

Problems with mssql_connect() on IIS

Ola — Wed, 14 Jul 2010 09:47:45 +0000

Lately I’ve been reinstalling my Windows servers a couple of time due to some problems. I’m running both PHP (WordPress) and ASP.NET on my server. From my WordPress blog I sometimes connect to MS SQL to get some data and this time i could not get the MSSQL extension in PHP to work. I got this error all the time.

call to undefined function mssql_connect()

When you Google this you mostly get the tip that you should put the file ntwdblib.dll in the /ext folder. I have a vague memory that this helped me the last time i had this problem but this time that didn’t help. I also noticed that MSSQL was not loaded when i run phpinfo().

Finally I found this post on the IIS forum that recommended me to run the command.

php-cgi.exe -v

When I did this I got an error message telling me that “This program cannot start because msvcr71dll is missing from your computer”. I then downloaded this dll file, put it in my C:\Windows\SysWOW64 (/system32 if you are on 32 bit). I also recycled my application on IIS and then everything worked. Hallelulja!

I have no idea if it’s related but i used “Web platform installer” to install PHP.

Return random rows from a MS SQL database

Ola — Tue, 17 Nov 2009 12:13:36 +0000

I always forget this command:

SELECT * FROM YourTable TABLESAMPLE SYSTEM (10 PERCENT)

This gives you some sample data from your database. In this case 10 percent of the content. You could also use TABLESAMPLE SYSTEM (1000 ROWS) to get 1000 sample rows. Great to use if you have a big database and do not want the same data again and again when you debug or something.

SQL Server: Saving changes is not permitted because table will be re-created

Ola — Thu, 10 Sep 2009 09:52:35 +0000

Microsoft has added a setting to Management Studio to prevent us from re-create tables when we make changes to them. I don’t like this settings and it would have be much better if they said ‘This table will be re-created, are you sure you want to do that?” instead of just stop us from doing it.

There is an option to turn this off if you go to “Tools -> Options -> Designers -> Table and Database Designers” and the uncheck the checkbox “Prevent saving changes that require table re-creation”.

ASP.NET membership: System.Web.Security. SqlRoleProvider problems

Ola — Tue, 16 Dec 2008 21:18:46 +0000

I had this really weird problem just now. I have done some work with the ASP.NET Membership provider and everything has been working great. But when i tried to deploy my application to the server i got this:

The ‘System.Web.Security.SqlRoleProvider’ requires a database schema compatible with schema version ’1′. However, the current database schema is not compatible with this version. You may need to either install a compatible schema with aspnet_reqsql.exe (available in the framework installation directory), or upgrade the provider to a newer version.

Alright, my database was exactly the same and everything looked fine. I tried to recreate my database with the aspnet_regsql.exe tool but nothing worked. Then i finally found this thread on the MSDN messageboard and one guy said that he gave his application a name in the aspnet_Applications table and put that name in the web.config like this.

connectionStringName="ApplicationServices"
applicationName="APPLICATION NAME"
name="AspNetSqlRoleProvider"
type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />

And that solved it. Really really strange and i have no idea if this is a bug or whatever. On my local machine (Vista with IIS7) it worked great to have a application named “/” but on my production machin (a Server 2003 with IIS6) it did not.

Now i should stop working for today.