Channel 9 Forums - Tech Off - Access Database http://mschnlnine.vo.llnwd.net/d1/Dev/App_Themes/C9/images/feedimage.png Channel 9 Forums - Tech Off - Access Database http://channel9.msdn.com/Forums Channel 9 keeps you up to date with the latest news and behind the scenes info from Microsoft that developers love to keep up with. From LINQ to SilverLight – Watch videos and hear about all the cool technologies coming and the people behind them. http://channel9.msdn.com/Forums en Wed, 19 Jun 2013 07:36:32 GMT Wed, 19 Jun 2013 07:36:32 GMT Rev9 7 -7 -1 Tech Off - Access Database I've been handed an Access Database to assess the possibility of moving to SQL and to put a new front end on to it.

I've opened the database. My exposure/experience to access is limited. 

The first thing I've done is to click the relationship button and add all the tables, there are no relationships defined. Crying Sad

Is it possible that these could be done in the code? (I've had a quick look, doesn't appear to be)  If so would it be exposed by the relationships view?

Thanks in advance.

 

]]> http://channel9.msdn.com/Forums/TechOff/Access-Database/3d7dddb3ef1942ea902ca0bb00f62cab#3d7dddb3ef1942ea902ca0bb00f62cab Tue, 28 Aug 2012 14:56:17 GMT http://channel9.msdn.com/Forums/TechOff/Access-Database/3d7dddb3ef1942ea902ca0bb00f62cab#3d7dddb3ef1942ea902ca0bb00f62cab Wayne Taylor 7 http://channel9.msdn.com/Niners/Kryptos/Discussions/RSS Tech Off - Access Database Have you looked at the "SSMA" tool from Microsoft?  It is a reasonably good "SQL Server Migration Assistant".  On simple databases its a point and click and you are done.  On more complex systems its at minimum a great first step.


I have migrated several major customized access database/applications used by several local municipalities with success.

 

One word of caution:  Watch out for the "Denial of Service" attack that Access will do on your SQL server.  The default login for Access is a user named "Admin".  If you use windows authentication against SQL, it will attempt to authenticate first as "Admin", then using the users credentials.  The combined number of users running your application can form an effective denial of service attack (even though it is unintended).  The only method I found around this was to not use windows authentication against SQL.

 

]]> http://channel9.msdn.com/Forums/TechOff/Access-Database/7ea5ed5f88674fca87b3a0bb0123ade7#7ea5ed5f88674fca87b3a0bb0123ade7 Tue, 28 Aug 2012 17:41:58 GMT http://channel9.msdn.com/Forums/TechOff/Access-Database/7ea5ed5f88674fca87b3a0bb0123ade7#7ea5ed5f88674fca87b3a0bb0123ade7 lensman 7 http://channel9.msdn.com/Niners/lensman/Discussions/RSS Tech Off - Access Database @Kryptos: It is more likely that there are no relationships involved in the design at all.

]]> http://channel9.msdn.com/Forums/TechOff/Access-Database/93f53d33e2f645479c0ca0bb014461da#93f53d33e2f645479c0ca0bb014461da Tue, 28 Aug 2012 19:41:02 GMT http://channel9.msdn.com/Forums/TechOff/Access-Database/93f53d33e2f645479c0ca0bb014461da#93f53d33e2f645479c0ca0bb014461da Dave Williamson 7 http://channel9.msdn.com/Niners/davewill/Discussions/RSS Tech Off - Access Database Relationships have nothing to do with the sheer number of connections to a database. 

I am familiar with the basics of database design.  I know when indexes are required, how to tune queries and such. If you are relying upon the "relationship" tool within access to optimize your database you are missing a lot of performance. 

If you are going to be migrating your application into a pure SQL database with an Access front end then get completely out of Access (data wise) and forget the toys.

]]> http://channel9.msdn.com/Forums/TechOff/Access-Database/f83297f946bd4adfa6b4a0bb014a1e55#f83297f946bd4adfa6b4a0bb014a1e55 Tue, 28 Aug 2012 20:01:55 GMT http://channel9.msdn.com/Forums/TechOff/Access-Database/f83297f946bd4adfa6b4a0bb014a1e55#f83297f946bd4adfa6b4a0bb014a1e55 lensman 7 http://channel9.msdn.com/Niners/lensman/Discussions/RSS Tech Off - Access Database There may be implicit relationships coded into the software without any relationships defined in the database schema, I have found that to be common in Access databases in the past (thankfully I no longer encounter them).

I'm with lensman; copy the schema and data into SQL Server and then set up indices and foreign key constraints.

Herbie

]]> http://channel9.msdn.com/Forums/TechOff/Access-Database/800f2b8a22974232943aa0bc006917c9#800f2b8a22974232943aa0bc006917c9 Wed, 29 Aug 2012 06:22:37 GMT http://channel9.msdn.com/Forums/TechOff/Access-Database/800f2b8a22974232943aa0bc006917c9#800f2b8a22974232943aa0bc006917c9 Herbie Smith 7 http://channel9.msdn.com/Niners/Dr Herbie/Discussions/RSS Tech Off - Access Database Thanks for your reply's.   I was ill yesterday.  Sad

OK, I look into it.  Thanks.

]]> http://channel9.msdn.com/Forums/TechOff/Access-Database/6cd581cd4b6042a38fa3a0bd008bd51c#6cd581cd4b6042a38fa3a0bd008bd51c Thu, 30 Aug 2012 08:29:06 GMT http://channel9.msdn.com/Forums/TechOff/Access-Database/6cd581cd4b6042a38fa3a0bd008bd51c#6cd581cd4b6042a38fa3a0bd008bd51c Wayne Taylor 7 http://channel9.msdn.com/Niners/Kryptos/Discussions/RSS Tech Off - Access Database  It is more likely that there are no relationships involved in the design at all.

This. Lots and lots of the time the table creators were apparently thinking 'flat file.' This probably has a lot to do with access being the entry point for talented amateurs to get into programming, ie

1. a company needs something done,

2. looks around the staff for someone with some ability,

3. said someone develops an app that works,

4. the app starts to be used,

5. now the company's stuck and can't get out of it

]]> http://channel9.msdn.com/Forums/TechOff/Access-Database/0758d56c5e834ba0aa8fa0d101229a8f#0758d56c5e834ba0aa8fa0d101229a8f Wed, 19 Sep 2012 17:38:03 GMT http://channel9.msdn.com/Forums/TechOff/Access-Database/0758d56c5e834ba0aa8fa0d101229a8f#0758d56c5e834ba0aa8fa0d101229a8f boogop 7 http://channel9.msdn.com/Niners/boogop/Discussions/RSS