Since most use SQL server, I thought I would post the question here.Is it possible, or is there a product or DBMS that enforces referential integrity across multiple databases and database types? Such as SQL Server, Oracle, etc...Thanks,Zath
View 2 RepliesUsing SQL Server Express 2005, I have two databases. AppDB - The main application database.GeoDB - A somewhat static ZIP code / states / other geographic stuff databaseI need to have some foreign key columns in tables in AppDB reference columns in the GeoDB database tables. Eventually other application database besides AppDB will be doing the same thing in our infrastructure. After googling and reading for days, here is what I
think I know:You cannot create foreign keys that reference tables in another database in SQL Server.You
cannot create foreign keys that reference columns in a view, and you definitely cannot make an index on a view that has base tables in another database.You can create a trigger that references tables in another database, but this can be flaky? (nested/recursive trigger problem).SQLServer
2005 supports multiple schemas within the same database. Maybe I should logically separate my databases this way? Seems like it would be a tough solution to manage since I already have some databases live in production that will eventually use this 'static' GeoDB. Also, seems like it
wouldn't be as portable as keeping the GeoDB info in its own database,
but maybe I'm being too software engineer-ish here - afraid of low
cohesion, high coupling.I will greatly appreciate any advice I can get, or any more options I am missing. Thanks,Adam Nofsingerucnmedia.com
Hi all,
I am writing a portion of an app that is of intensely high online eCommerce usage. I have a question about identity columns and locking or not.
What I am doing is, I have two tables (normalized), one is OrderDemographics(firstname,lastname,ccum,etc) the other is OrderItems. I have the primary key of OrderDemographics as a column called 'ID' (an Identity Integer that is incrementing). In the OrderItems table, the 'OrderID' column is a foreign key to the OrderDemographics Primary Key column 'ID'.
What I have previously done is to insert the demographics into OrderDemographics, then do a 'select top 1 ID from OrderDemographics order by ID DESC' to get that last ID, since you can't tell what it is until you add another row....
The problem is, there's up to 20,000 users/sessions at once and there is a possiblity that in the fraction of a second it takes to select back that ID integer and use it for the initial OrderItems row, some other user might have clicked 'order' a fraction of a second after the first user and created another row in OrderDemographics, thus incrementing the ID column and throwing all the items that Customer #1 orders into Customer #2's order....
How do I lock a SQL table or lock the Application in .NET to handle this problem and keep it from occurring?
Thanks, appreciate it.
How can I make sure that a couple of commands are either all executed on the database or none of them. For example right now I have an insert, update and delete command. I'm calling each of them with a SqlCommand. So I am afraid that that one of them might be executed, then there's a bad connection and the other two are not. How can I prevent this so that only all commands or nothing is executed on the database?
View 2 Replies View RelatedI have transaction table where the rows entered into the transactioncan come a result of changes that take place if four different tables.So the situation is as follows:Transaction Table-TranId-Calc AmountTable 1 (the amount is inserted into the transaction table)- Tb1Id- Tb1AmtTable 2 (an amount is calculated based on the percentage and insertedinto the transaction table)-Tbl2Id-Tb2PercentageTable 3 (the amount is inserted into the transaction table)-Tbl3Id-Tbl3AmutTable 4 (an amount is calculated based on the percentage and insertedinto the transaction table. )-Tbl2Id-Tb2PercentageHow do I create referential integrity between the Transaction table andthe rest of the tables. When I make changes to the values in Table 1 -4, I need to be able to reflect this in the Transaction table.Thanks.
View 6 Replies View RelatedHi,
I am trying to display a report from a bug tracker that shows the number of issues logged per month, per year and how many issues have been closed in that month. I have no difficulty displaying the number of issues that have been logged within a particular months, but when I need to display the number of issues closed - I get stuck. I am calling from one table 'bugs', which contains date_reported, status_id. I can do a count on the number of bugs between certain dates but I cannot list the number of closed issues in that exact time. I get the feeling I need a select statement within a select statement? If anyone can help. Thanks
I have a text file to import where there are three file types: a header which has info about who sent the file and begins with 'H', detail records that begins with D and a trailer record that begins with T and just has the record count following that. The fields are delimited by '*'. H, D and T records each contain a different number of fields.
I suspect that what I should do is to split this file into three separate files. I tried to do this with SSIS but ran into problems. If I make the output a file destination, it won't let me use that output as input for the next process. There are no arrows I can grab onto to link to the next transform.
This is my first SSIS package although I made hundreds of DTS packages a few years ago. I can't figure this out in DTS either.
This sounds like it should be an EASY thing to do.
A flat file I must parse has multiple record types in the same file that must be processed together. For instance, in the following example:
01TestStuff888
02TestStuff2
03TestStuff3
01TestStuff4
02TestStuff5
Each 01 record type has the records after it associated to it until the next 01 appears, so TestStuff would have TestStuff 2,3 related to it while TestStuff 4,5 belong together. In the example the 888 in the 01 record is the key to the group, but it does not appear in the following lines.
The problem is that each record type has different line formats, columns, etc, so they must be parsed differently. I have created a conditional branch on the first two characters, and written each record type out to a seperate flat file for that type, so that they can be imported again and parsed with the Flat File Source, but I am unsure how to relate them again. I tried appending the 888 to the other lines before they were written out, but I can't find a way to share the variable across the conditional split branches using a script component.
Does anyone have an idea how I could parse these files and keep the relationship intact?
Is there a way to tell the flat file wizard to use a different map based on certain characters?
Is there a way to share a variable across the different braches of a conditional split.
Strange question I know, but thanks for any help.
Travis
im trying to set up maintenance plan for the check database integrity...
In sql 2000 you get a nice little log in SQL Logs
DBCC CHECKDB (WSS_Search_db3) executed by xxx found 0 errors and repaired 0 errors. Elapsed time: 0 hours 0 minutes 1 seconds.
But in SQL 2005
Im not getting a nice log of this but getting it against some system database and not the database i selected
Date1/22/2008 5:19:43 PM
LogSQL Server (Current - 1/22/2008 5:19:00 PM)
Sourcespid84
Message
DBCC CHECKDB (mssqlsystemresource) WITH no_infomsgs executed by XXX found 0 errors and repaired 0 errors. Elapsed time: 0 hours 0 minutes 1 seconds.
Anyone got this to work?
Trying to get the same message i got for SQL 2000 or at least so i can confirm it ran.
Hi,
I have no way to test this. If let's say the database has logical integrity errors, will it throw back an error to the Check database integrity object such that, the error arrow (the red line which is the error handler stuff) will be triggered for notification purposes?
cherriesh
what does check database integrity in maintenance plan do.
i heard that the transactional log growth in sql server should be fixed to maximum available disk space and must be monitore the threshold through maintenance plan.how can it be done. please advice me through maintance plan instead of
shrinking the log as it is unnecessary IO to the disk.
How often is the check database integrity scheduled. is it daily or weekly.
I have a database hosted that doesnt passes the integrity test. Here is the error it gives :
Executing the query "USE [db_cs]
failed with the following error: "Could not locate entry in sysdatabases for database 'db_cs'. No entry found with that name. Make sure that the name is entered correctly.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
Any idea whats wrong and how I can let the integrity test pass for this db.
Thanks,
Rubal Jain
Our database stores vehicle data in one table, but 3 different types of data are stored in the one table. The table contains all the columns for all 3 types so when you query the table you get at least 3 rows back with null values for all the columns that don't apply to that record. The data is imported to the table when it's updates so there's a possibility that they're updated at different times so they have a different BATCH like:
BATCH TYPE ID RATING INSURANCE SAFETY
300 SAFE 123 NULL NULL A
300 INS 123 NULL YES NULL
250 RATE 123 A NULL NULL
What I'd like returned is:
ID, RATING, INSURANCE, SAFETY
123 A YES A
I'm trying to do a case statement to pull the data down, but I keep ending up with multiple rows because of all the nulls. I tried doing a SUM of the case statement with an ISNULL(SAFETY,0) but I can't SUM char values. I can probably do this with 3 temp tables to load the data that I want for each TYPE into them and then select and join them together, but is there a better way to do this?
I want to return Order records which are one type and don't have the other type.
The issue is I have Orders with which has 2 distriubtion types .
Example
Order 12345 has Type S and Type X.
Order 67891 has Type S
I only want to return Order 67891 that are s Type and does not have type X
Hello All,
We are developing customer support application. We will have so many customers after launching this product. But my problem is how will i store data of all these customers in SQL Server. Please suggest me.
I have setup a full maintenance plan on SQL2005. When I run the job, I don't see any error but by loooking at the Log file viewer it appears that Check Database Integrity step failed because :
Alter failed for Server 'LUMONT001'.
Moreover, when I run DBCC CHECKDB from the console I have no error message. Any clue?
Thanks, Paul
Using SQL Server 2005, I have two databases.
AppDB - The main application database.
GeoDB - A somewhat static ZIP code / states / other geographic stuff database
I need to have some foreign key columns in tables in AppDB reference columns in the GeoDB database tables. Eventually other application database besides AppDB will be doing the same thing in our infrastructure. After googling and reading for days, here is what I think I know:
You cannot create foreign keys that reference tables in another database in SQL Server.
You cannot create foreign keys that reference columns in a view, and you definitely cannot make an index on a view that has base tables in another database.
You can create a trigger that references tables in another database, but this can be flaky? (nested/recursive trigger problem).
SQLServer2005 supports multiple schemas within the same database. Maybe I should logically separate my databases this way? Seems like it would be a tough solution to manage since I already have some databases live in production that will eventually use this 'static' GeoDB. Also, seems like itwouldn't be as portable as keeping the GeoDB info in its own database, but maybe I'm being too software engineer-ish here - afraid of low cohesion, high coupling.
I will greatly appreciate any advice I can get, any links to articles, or any more options I am missing.
Thanks,Adam Nofsinger
ucnmedia.com
Hi,
I want to what check database integrity task does in Maintenance plan..
Anyone help.
I searched the forum on this topic and saw the following explanation on Check Database Integrity Task, by DarrenSQLIS.
"The Check Database integrity task will fail if the DB has a problem. The task fails; the details are raised in the error event and dumped to the log etc. You can use on Failure precedence constraints or an OnError event handler to capture that failure and do something if you wish."
Here is the link to the quote above.
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2290253&SiteID=1
I would like to continue this discussion on this new thread to help my understanding.
I understand that this command does dbcc checkdb( ) command on a specified server for the databases you want to check. And if a database has a problem the task will fail and raise an OnError event. DarrenSQLIS goes on to say that the error is dumped to a log. What log is this? Where do I specifiy the location of this log?
Our system is 24/7, ldf file disk space is 30 gb.
As per the advice given by somebody
i set ldf initial log size as 29 gb and restricted the growth and set the autogrowth to 500 mb
i did not run and shrink ldf command on daily basis. this is the advice given by another dba.
then he suggested to create a maintenance plan to check database integrity check. whick will
check the disk space threshold.
i did not understand how will the maintenance plan check the disk space and give an alert.
where should i check the alert for this maintenance plan. secondly how can i stop my database log file to deliver a message that my disk is full.
please suggest me a best method. where i am wrong , how should i handle the situation without the dba monitoring.
and our system has lot of batches running for every minute.
Hi everbody,
Integare check job failing on replication(merge) database.Can you tell me how to schedule the this job.
Thanks
Mark
Hi,
I want to automate the process of database integrity checks in sql server any suggestions how to do
I'm using SSIS to import seven flat files (each containing a different record type) into a staging database. This part was easy.
Now I need to export the records from all seven tables into a single flat file structured in a nested hierarchy using common keys. (This format is required by the vendor for loading data into a new system).
I could use some ideas on the data transformations needed to combine all seven record types into an hierarchical record set which can then be written to my Flat File Destination. I'm currently looking at an article on SLQIS.com ("Handling Different Row Types In The Same File") which seems close to what I need, but they are importing (ref: www.sqlis.com/54.aspx ). I'm not sure if I should just reverse this for export or use something different. Any comments are appreciated.
Diagram of Record Hierarchy
typeA (parent key, ...)
typeB1 (parent key, childSet key, date, ...)
typeB2 (parent key, childSet key, ...)
typeC (parent key, childSet key, ...)
typeD (parent key, childSet key, ...)
typeE1 (parent key, childSet key, date, ...)
typeE2 (parent key, childSet key, ...)
The record types B1 through E2 form a complete set. Each set has it's own unique child-set key. There may be one or more sets for each typeA record (although it's possible that typeE records don't exist in the most recent set).
Howdy all,
I've seen several posts about reading and writing files that have different record types with varying column metadata. My particular file has 11 record types plus several header types and looks something like:
<Header1>
<Header2>
<Detail01-#1>
<Subdetail02>
<Subdetail03>
...
<Detail01-#2>
<Subdetail02>
<Subdetail03>
...
...
Since i need to get different detail and subdetail records, i can't really use the technique of 3 dest file connection managers found in http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=87269&SiteID=1
I've tried using an exec sql to get the main detail records and then a forech ADO en umerator that would get the subdetails, but it all seems so kludgy. I'm starting to think that I should just write the bulk of the file creation code in a c# app instead of trying to smush this into SSIS. Opinions? Am I missing some trick in SSIS?
TIA,
-Peter
Is there a way to disable referential integrity on all destination tables for an import?
Thanks.
Can someone give me an example on how to enforce cross-database referential integrity with triggers in SQL Server 2000?
Thanks,
Joel
In SQL Server 2012 (also 2005 and 2008), can you have Referential Integrity across a Database? Across a Schema?
View 1 Replies View RelatedHi,
We are in search of beta testers for our new software tool for SQL Server : Remote Keys allows you to define and enforce cross databases integrity constraint. With Remote Keys, you can create a foreign key between to SQL tables located in distinct databases.
Beta version can be downloaded here : www.remote-keys.com.
Thank you,
Tom
Hi,
We are in search of beta testers for our new software tool for SQL Server :
Remote Keys allows you to define and enforce cross databases integrity
constraint. With Remote Keys, you can create a foreign key between to SQL
tables located in distinct databases.
New version (beta 2) can be downloaded here : http://www.remote-keys.com
Thank you,
Tom
Hi gurus:
I met a very strange problem recently. I set up a database integrity check maintenance plan. But this job failed every time. I looked into the logs, the error message was that Databases that have a compatibility level of 70 (SQL Server version 7.0) will be skipped. I used the sp_helpdb to check the version of the databases included in my maintenance plan. The sp result shows that all the databases are above version 80....
Even more strange, i can successfully run the dbcc check query on each database.
Any comment and suggestion will be very appreciated.
Hi All,
I have built a package that firstly shrinks a database and then backs it up which is scheduled to run each day, but I would like to add a check (Check Database Integrity) in as the first task and if the Database checks out ok then continue on, if not send an email.
Now, I am unsure if the Check Database Integrity Task in SSIS actually returns the success or failure message back to the package that I am after. The SQL behind the task includes the NO_INFOMSGS option.
Can anyone advise if it is possible to have the status/integrity of the database returned to the SSIS task and to proceed based on the result?
Regards
Does anyone know if it is possible to have text in a single table cell where the first field is formatted in italics and the second is in normal?
eg: = Fields!firstname.Value(as italic) & " " & Fields!lastname.Value(as normal)?
shidot
In our production we have a database by name MyDb.The application team wanted another database by the name MyDbOld which contains the data of Mydb 1 month old. So I created a database MyDbOld in other instance(test) and restored MyDbOld from the one month backup of MyDb in production server. In test instance I backed MyDbOld as MyDbOld.bak...
In the production instance I created a new DB by the name MyDbOld and restored the MyDbOld in the production from the backup of MyDbold.bak in the test instance. Now I have 2 databases in the production instance ie MyDb and 2)MyDbOld. However I find the logical names of both the databases to be the same although the database name and the physical file name to be different.My questions are-:
1) Does it in any manner affect the integrity of the 2 databases if the 2 databases are in the same instance and have the same logical name?
2) Would the dml or data retrieval operations in the 2 databases have any conflict in any manner what so ever?
3) Having a unique database name, and unique file names for the physical files for any database in an instance what is the purpose and significance of additionally having a logical name for a database?
4) Which I could restore a database from the backup of another database in the same instance and at the same time change the logical and physical name of the files to correspond to the new database.