Database Compatibility Mode - When To Change???
Sep 14, 2004
I have been migrating Databases from a SQL Server 7.0 Instance to a 2000 Instance. Basically the method I use is as follows:
a)Create a new Database on the Destination Server (same name as the Source) When I create the new Database on my destination server, the compatibility mode is '80' and the source is always '70'
b) do a 'revlogin' on the Source Server and use the output from that query to recreate the logins on the destination server
c) make sure that the default DB for the newly creates logins are correct and change them if necessary
d) Backup the DB on the Source Server and Restore it to the Destination Server.
e) Check login permissions and fix any orphaned users - usually I don't find any that need to be fixed, but I always check.
I've read BOL on Changing the compatibility mode on the Database... but I'm still unsure when I would have to do this and why???????????????? SHOULD I be changing the compatiblity mode from 80 to 70 when migrating Databases from 7.0 to 2000???? Any advice on moving DBs in this manner would be appreciated.
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Mar 11, 2008
Hi,
We are planning to upgrage our SS 2000 databases(couple of hundreds) to SS 2005.
To minimise the potential work arounds, it is agreed to have complex databases, continue running on compatibility mode 80. What are the potential impact of having database on mode 80(apart from not being able to use new feature)on SS2005?
Fruther how we can we import SS 2000 DTSs to SS 2005 SSIS in an cluster environment?
Thanks,
Sajish
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Jul 16, 1999
We have some users who are nervous about our upgrading to SQL Server 7.0 even though we will use 6.5 compatibility mode initially while we work through 7.0 upgrade issues in the applications.
Has anyone had bad experiences with the 6.5 compatibility mode feature? Just how good is it?
Cheers
Matt
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May 1, 2008
I have a Sql Server 2005 instance that was upgraded from 2000. The compatibility mode of master is still set to 80. Can I change this to 90?
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Dec 20, 2006
I currently use MSDE and now I need to upgrade because we moved to 2005. The problem for me is teh compatibility mode. I need to change it to 80 (2000).
I also need to do it via command line because we have a base command line install for users.
We use it to attach databases and view information.
Is there a way to install SQL Express with a default mode of 80 (SQL 2000).
THanks
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Jul 20, 2015
I have a 2005 database sitting on a 2012 server, we're looking to change its compatibility mode from 90 to 110 so we can avail of what 2012 offers.I did a migration project a couple years ago for SQL Server 2000 databases changing to 2008 R2 and we ran into loads of problems where we left most databases in compatibility mode 80 as these were application databases that the owners couldn't stand over in terms of deprecated code / features no longer in use in 2008 R2.
From what I can see with changing from 90 to 110, there doesn't seem to be as many issues but I just want to double check if there's a way to confirm this. I know upgrade advisor is a handy tool but will it pick up database specific issues as opposed to database server compatibility issues? URLs...I know UA won't cover all the bases but it would look good when attached to the report I'm submitting recommending the change.
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Feb 1, 2008
On my current contract we have a SQL 2005 box with a user database and the tempdb database in 6.5 compatibility mode. I would like to remove the user database and change the tempdbs compatibility mode. When you try and use EM just about everything fails with errors about collation or syntax. From what I have found it could be related to the tempdb being in 6.5 compatibility mode but either way I would like to remove this old unused DB.
My question is after I remove the user DB and reset the tempdb compatibility mode what will or could break? I haven't been able to find much on what would change or what to look out for after the change is made. Has anyone else done this? If so what issues did you face.
Thanks
Doug
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Mar 10, 2015
Recently we had multiple production failures because one database was in single-user mode. I am trying to recreate this scenario to write a script that will kick out that connection that was holding database in single-user.In SSMS window 1 I run the following code:
use master
go
alter database test
set single_user
with rollback immediate
[code]....
Yes, it shows one record, but the database name is master, not test. And indeed, I run it from the context of master. Also tried sp_who, sp_who2, sys.dm_exec_requests - nothing works. For dm_exec_requests it shows nothing because it does not run at the current moment.Any other solutions to catch this SPID with a script?
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Jan 5, 2001
I'm running SQL Server 7.0. I have a DB running with 6.5 compatibility mode.
Do INSERT, UPDATE or DELETE queries use row level locking in this DB ?
(I know if I set the db compatibility mode to 7.0 row level locking will be enabled)
Thanks in advance for your help.
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Aug 8, 2015
We recently upgraded out SQL version from SQL2008R2 to SQL2014. As such, the compatibility mode changed to SQL2104 (120).
We have several queries that used to run fine that now take forever to bring back results. There are no errors (which surprised me). They just take way too long now. PLus they seem to be causing high I/O and CPU.
If I change the compt level back to SQL2008 - these queries run fine.
QUERY with SQL2008 compt level - finished in 2 minutes.
QUERY with SQL2014 compt level - finishes in 3 hours 22 minutes.
same exact query - same server - only thing changed was compatibility level.
WHat do I look for in the queries that could be causing this? (they look fine but obviously I'm missing something here)..
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Oct 29, 2007
Hi,
I've been scouring the forums and the web for anything that would substantiate an argument for database application developers to keep developing in SQL 8.0 when we have migrated to SQL 2005.
I read somewhere that compatibility 8.0 mode is an intern stepping stone for migrating from 8 to 9, but it seems 2005 will handle and run compat 8.0 databases just fine.
So am finding it really diffucult to substantiate my argument against running 2005 with all databases in compatibility 8 mode indefinitly.
Any suggestions or links that could help me with this.
Joe
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Mar 24, 2014
We upgraded QA and production to sql server 2012 last year ( in place) leaving the user databases at sql 2005 ( 90 ). A few months ago the QA user databases were set to sql 2012 compatibility mode. Management is worried about upgrading production and wants to know if we can quickly roll back.
I want to confirm that we can roll back using the same command, and if dbcc freeproccache can be used to avoid having to update all statistics.
ALTER DATABASE <mydatabase> SET COMPATIBILITY_LEVEL = 110
ALTER DATABASE <mydatabase> SET COMPATIBILITY_LEVEL = 90
This works fine in QA on my own test user database. No errors.
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Nov 15, 2007
Hi All
I€™m having a problem setting up maintenance plans on one of our SQL 2005 servers but first here€™s a bit of back ground.
The server is a Virtual machine running win2k3R2 SP2 server std and SQL 2k5, A supplier arrived to install and app on the server when discovering there app didn€™t work with 2k5 they seem to have set the 2 dbs on the server into 2k compatibility mode and set the entire SQL install to think its a 2000 install. (I€™m not sure how this is done all I can see is the wrong version number in management studio) The problem this is giving me it that the folder in management studio for Database Maintenance Plans is no longer under the management folder instead it under a sub folder called Legacy (which is how management studio seems to deal with all registered 2000 instances) and as such a can no longer right click and create new database maintenance plans is there any way around this or will I have to setup my backup job manually?
Ohh and have the supplier shot at dawn
Thanks All
Jon
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Sep 17, 2007
Can you run SQL Server 2005 in SQL Server 2000 compatibility mode and still use it with Reporting Services 2005?
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Mar 24, 2008
Hi All.,
How can I change the compatibility level in sql server 2005
to 90., It provides option only to 80., I changed multiuser to single user and I am using the server only but still it gives option only to 80., How can I change to 90 in this case,
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Aug 23, 2006
I have a SQL 2005 server that has more than 90 databases, and I need to change the compatibality level to 9.0. Is there an easy way to do this in SQL?? any help is greatly appreciated.
Emad
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Aug 6, 2007
Hi everybody:
We have recently migrated our DDBB from SQL 2000 to SQL 2005 in several Servers. We have 2 DDBB per Server and the size of mdf files are between 10 and 40 GB.
We put Compatibility Level in 90 in SQL 2005 but when we arrive at work we see that our Maintenace Plans failed because the Compatibility Level of one of Data Bases changed to 70.
We have a Trace executing the whole day registrying the execution of stored procedure 'sp_dbcmptlevel' but in despite of Compatibility Level changes, the Trace does not registry anything.
Has anyone passed before me for this situation? Thank you in advance and greetings,
Nuria
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Dec 18, 2007
I am in the process of migrating from Sql Server 2000 to 2005. Part of my plan is to move some database's to 2005, but use the 2000 compatibility mode for the short term. My issue is this, our DR boxes are still on SQL Server 2000, would I still be able to use our log shipping processes? Or would I be better off in starting with migrating the DR boxes to 2005 first?
Thanks in advance.
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Jul 27, 2015
how to put sql server database in suspect mode intensely and  get it out from suspect mode to normal mode.
  i am using SQL server 2008 R2
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Aug 26, 2007
Dear All..
I am using sql server 2005 , the problem with me is that I want to change my Authentication type.... now It has setted as 'Windows Authentication and Sql Server Authentication', Here I wants to change to 'Sql Server Authentication' Only... Can I do it without re-installing my sql server... I did try by going Securiy Tab in properties of my server... there are two options 1)Windows Authentication 2)Sql Server and windows Authentication mode, I want to change it to only Sql server Authentication....meaning to say - shld ask for authentication whenever log on to server
hope any one can help me
Thanks in Advance
Akbar
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Sep 25, 2000
Hi,
How I can change a license mode?
I choose PER SERVER, but I need PER SEAT.
Thank you at advance.
Mira.
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Dec 22, 1998
I choose "PERSERVER" as licensing mode during the installation of the SQL Server by running the Setup. Now I want to change it to "PERSEAT" but I don't know how.
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Nov 14, 2007
Change the Authentication Mode of the SQL server from "Windows Authentication Mode (Windows Authentication)"
to "Mixed Mode (Windows Authentication and SQL Server Authentication)".
How do I do this?
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Feb 19, 2008
We have 300+ databases on one sinlge server (SQL 2005). If I need to change recovery mode from full to simple for all of them, is there any way to do so? Please advice.
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Jul 23, 2005
I need to change the SQL server license mode on an installed SQL server2000 cluster from processor license to per seat.Does anyonw know?
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Dec 12, 2006
I installed SQL Server 2005 using Windows Authentication Mode (Windows Authentication)"
How can I change the Authentication Mode of the SQL server from "Windows Authentication Mode (Windows Authentication)"
to "Mixed Mode (Windows Authentication and SQL Server Authentication)"?
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Jul 6, 2005
Does anyone know how to change the SQL Express authentication mode from Windows Authentication to Mixed Mode after it's already been installed?
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Jan 25, 2008
I have a database that is set to Full recovery model, I would like to switch to simple. I must perform some procedure before doing so?
The size of the transaction log is very high in this database, I would like to decrease it before moving to simple, have a problem doing that?
Thank You,
Ralph Haddad
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Jun 7, 2006
I am unable to change the mirror operating mode on a test database mirror I have set up. I installed (from MSDN) the RTM SQL 2005 Std Edition and applied SP1, then set up a mirror, which works fine but only on High Safety mode. I want to use High Performance mode, but the operation mode radio buttons are greyed out for me in the mirror properties page. Also, I tried running:
alter database TestDB set safety off
and recieve the error:
Msg 1473, Level 16, State 6, Line 1
This SQL Server edition does not allow changing the safety level. ALTER DATABASE command failed.
Are the various mirror modes not supported on the Std edition or am I overlooking something?
Thanks.
From the db engine server properties:
Product: Microsoft SQL Server Standard Edition
OS: Microsoft Windows NT 5.2 (3790)
Platform: NT INTEL X86
Version: 9.00.2047.00
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Nov 13, 2015
I have a new 2014 SSAS installation. During VS2013 Tabular Project create I get an error Cannot connect, Reason The workspace database on server ***** is not running in tabular mode.I've changed   msmdsrv.ini  - DeploymentMode>2...The server wont start.
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Sep 11, 2006
Hello,
I have created one application in visual studio 2005 and also created setup project of that application. now i want to install SQL Server Express edition with my application. so i have checked SQL Server Express 2005 in Setup Project Properities(Prerequisites...). now i want to change SQL Secirty Mode during setup. and i don't know how can we do this?
Any idia?
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May 13, 2015
I need to change the authentication mode from 'windows' to mixed, its a 4-node participating in always-on... Will this brake/impact alwayson in any way? I know I have to restart the sql instance.
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Feb 20, 2001
Hi!
After upgrading SQL Server from 6.5 to 7.0 my production database compatibility level is "65".
I checked that by executing sp_dbcmptlevel <database_name>.
I can change it to "70" but my question is how it's going to affect the application and do I have to change it?
Thank you
Lena
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