I have a problem that arose last week and seems to be spreading. I installed a MS Access database front end on several pcs at a company, that link by ip address to SQL Server backend. This was done over a year ago and has been working perfectly until last week. The frontend accesses the user table in the back end to enable the user to login. It came up on one pc that the user table was not a valid name. When I looked at the database, the linked user table was missing from the linked tables in the front end. I put a fresh copy of the front end on the pc and when you try to login you get the same error and you can actually see the user table disappear from the frontend. If I go to the LTM, to add the table back again, it is not showing in the available tables from the backend. I have tried several times to put a fresh copy on the pc but the same thing happens every time.
Today, 5 computers in the same office have the same problem.
If anyone has any ideas, I would be most grateful.
Related
i have a blog with wordpress but sometimes i have problem with that
i got blow error
« Error establishing a database connection This either means that the username and password information in your wp-config.php file is incorrect or we can't contact the database server at %s. This could mean your host's database server is down.
Are you sure you have the correct username and password? Are you sure that you have typed the correct hostname? Are you sure that the database server is running? If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums »
by searching the internet some say that it can come from the database connection information but my concern in my case is that it only happens occasionally and if I wait 5 minutes and I refresh again, the site works again correctly, then if I wait a few hours and I try to reconnect the problem comes back again… it happens in my back end and my front end, I have searched in vain I can't find anything in my case please please help friends, here is the URL of the site:
(https://www.creationsjennah.fr/) host is 1&1 IONOS : offer web hosting option in business plan
I would like to remind you that I am probably the only one to use the site, it is in the test phase in an online environment, I see it in the statistics of my site.
this is something critical for me. In the last few days some data from one table is deleted (Oracle 11g).
I have checked with DBA but in the database, nothing is logged and he said that data is deleted from the front end.
Can anyone help me to find out what data is deleted and who did it as neither application's logs are having any information and Audit_trial in DB is set to none?
You may try using LogMiner. This is a built-in utility of oracle that scans redo-logs/archived-logs and displays all DML commands that were run.
I'm developing an asp.net mvc application at my office. I wanted to work at home as well, so, I pushed my project on github, when I came my home back, I pulled it from github to my projects folder, now I tried to access its SQL Server database in server explorer using windows authentication, on pressing ok, it showed me the following error :
Cannot open database "HrAndPayrollSystem.Models.HrAndPayroll" requested by the login. The login failed.
Login failed for user 'user'.
and here is my connection string :
<connectionStrings><add name="HrAndPayroll" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;Initial Catalog=HrAndPayrollSystem.Models.HrAndPayroll;Integrated Security=False" providerName="System.Data.SqlClient" />
What could be the reason, how should I resolve it? Thanks in Advance :)
So, I somehow managed to get through this.
In other words, this error says that you need to access your database at least for a single time, means you need to perform some transactions with the database, inserting something or retrieving something, at this point you accessed the database for the first time on the different machine. Since, I had to access database at the point when my application starts, so, crashing start crashes my whole application, so I created another controller that does not contain any authorize attribute, just to leave it open in order to access the database, created a single field, accessed the database, now go and check your database in server explorer, you are about to access it for the first time in the database, and now also, it will never crash anywhere.
So, the point is that you need to access your database at least for a first time..
I have a VB procedure that changes a connection string for all 360 linked tables in my Access 2002 database. If I run this procedure using an SQL server in my local network, it runs about 30 seconds. The problem is that I have to use an SQL server somewhere in the Internet. In this case the procedure runs for about 5 minutes.
The question is - how can I prevent Access from connecting to the server to check every table I re-connect?
An alternative question (maybe more correct).
I need to run that re-connection procedure on every user's computer every time I give them a new version of the database, to save user's login and password into every linked table. Maybe there is some other way to set the username and password for the ODBC connection?
Linked tables do NOT all of a sudden decide to connect to some some server. So the recommend approach here is to link the tables once (and leave the password + user name OUT of the link).
Then on startup, all you do is execute ONE logon command and then ALL OF THE tables are instant available and able to be used WITHOUT any re-link or re-fresh of the conneciton string. Same goes for any pass-ghouth queries etc.
So the existence of a linked table IS NOT USED on startup and you can have 3 or 300 linked tables and launch Access WILL NOT cause a connection to occur “unless” you decode to do something like a re-link.
Bottom line:
You don’t and should not re-link on startup
You do not need to include the user name + password in the table links.
A ONE TIME logon at startup will cause Access to “cache” the user name + password and this will be used for ALL CURRENT EXISTING table links. The beauty of this is when the user exits the applctaion then no passwords etc. are stored in the linked tables.
So you cannot prevent access from connecting to the server during a table re-link since that what it must do.
However there is LITTLE if not ZERO reason to re-link every time on startup? Why are you doing a re-link are startup?
I need to run that re-connection procedure on every user's computer every time I give them a new version of the database,
Why not link the database on your machine BEFORE you distribute it to that user? After all the connection is over the internet – so you should be able to link to that database system from your development computer. And assuming you cannot, then ok, perhaps you might beforced to do a ONE time re-link. Try the re-link with a cached logon – it likely will run faster, but then again it will only be a one time re-link anyway.
save user's login and password into every linked table.
NO NO this is NOT required nor is recommended. If a user holds their mouse over a linked table then if you included the user name + password it is in plan view.
You DO NOT want to include the user name + password in each linked table. How to execute a SINGLE logon and have that logon used for ALL tables (without a re-link) and for ALL tables EVEN without the user id + password saved is outlined here:
Power Tip: Improve the security of database connections
http://blogs.office.com/b/microsoft-access/archive/2011/04/08/power-tip-improve-the-security-of-database-connections.aspx
I'm fairly new to SQL Server. I have done basic admin, backups etc. I have also spent 2 years doing MySQL for a software company offering software support for their MySQL bespoke program. I'm mainly a tech guy (desktop, Networking) but getting my head round this DB stuff!
I have started with a company that run SQL Server 2005 and need some stuff doing, and I am struggling with the syntax more than anything. The company have 4 SQL Servers running the same db's (program wise) for 4 differing locations.
What I am trying to do is copy the updated cost price list from table 1 to the other tables with * criteria. Basically copy table.parts from server1.parts to server2.parts * currencyconvertion field * markup (%)
That bit seems to be quite easy except I cannot get the db's to link. I enter the server name which contains - and the syntax says wrong eg uk-server1 'can't find 'uk'? Also I am unsure in the 4 part address is correct servername, dbname, schema, table?
Right ok. Previously when tried I was unable to link the two servers. I have now resolved this and the server is now linked. I have been told that maybe there is a need for [] to quote'' server name. I have tried this with no success. The problem seems to be the name of the server having a - uk-efacs. as soon as I type this and remember it is now linked the herror is can't find server efacs an uk is wrong?? It's not ready the full server name? WHY?
Figured this out by trial and error just needs [] by server name ie [uk-efacs].db.table.field. This now is ok just need to work on my syntax as the query shows errors.
Try creating a Linked Server record on the server you're running this from. In Object Explorer (in SSMS) expand Server Objects, right click Linked Servers and select new. Select SQL Server and type the name of your remote server and then try your query again. Bit puzzled as the snippet you provided
update partmaster
set partmaster.fsunit = uk-efacs.efacsdb.partmaster.fsunit * uk-efacs.efacsdb.currency.currate * 1.32
Seems to parse just fine.