I am rebuilding a system so instead of using multiple Access and Excel files the business I am working for, uses SSRS for reporting requirements. Most things are coming along great but I have one sticking point.
One of the Access databases has a table within itself rather than replying on the server data, which is there to keep the grade level of staff up to date (as it is a very complex method on how staff go up a grade).
Now I could easily build a new table in the SQL Server, but I do not want management relying on me for updating this particular table. I could also rebuild the Access database to upload the data to the server which is probably what I will do, but what I wanted to ask first is there a way to join to the table in the Access Database from the T-SQL query, as if it was another table in the main database?
Yes. Attach the database file under Server Objects as a Linked Server.
To ease referencing the table in this, create a view in your database that "hides" the needed weird triple-dot syntax, like:
SELECT FIELD1, FIELD2, FIELDN
FROM THELINKEDSERVERNAME...YourTable AS LinkedYourTable
Then use this view to read the table.
Related
Not able to load multiple tables, getting error:
Exception in component tMysqlInput_1 (MYSQL_DynamicLoading)
java.sql.SQLException: Bad format for Timestamp 'GUINESS' in column 3
One table works fine. Basically after first iteration the second table trying to use the schema
of the first table. Please help, how to edit the component to make it
correct. Trying to load actor & country table from sakila DB mysql to
a another DB on the same server. Above image is for successful one table
dynamic loading.
you should not use tMysqlInput if output schemas differ. For this case there is no way around tJavaRow and custom code. I however cannot guess what happens in tMap, so you should provide some more details about what you want to achieve.
If all you need is to load data from one table to another without any transformations, you can do one of the following:
If your tables reside in 2 different databases on the same server, you can use a tMysqlRow and execute a query "INSERT INTO catalog.table SELECT * from catalog2.table2..". You can do some simple transformations in SQL if needed.
If your tables live in different servers, check the generic solution I suggested for a similar question here. It may need some tweaking depending on your use case, but the general idea is to replicate the functionality of INSERT INTO SELECT when the tables are not on the same server.
I was creating MySQL database to add medicine.I created a table and I need to add one more tabe.After creating it I tried to query the database from the sql workbench.But it donot show the table but it is present in the EER Model.How can I solve this problem.
Modeling is just the task of abstractly designing your schema and its objects (e.g. tables, views etc.). It does not actually create these objects. For this you have to forward engineer your model to a server (see Database menu). Once done you can use the Synchronization feature to update either model or server (or both) with any changes made.
But keep in mind this is only for the objects, not for any data.
I have a report in SQL server and I am migrating this to Oracle.
The approach I used in SQL server is load sum(sales) , person for given month into temporary tables (hash tables) and use this table to join with other transaction tables show the details, but when it comes to oracle I am not sure if I can use the same method here, because hash tables (temporary tables in SQL server) are specific to session and might not create any problem with output, please advise if there is anything in oracle which is analogous to that.
I came to know there are global temp tables in oracle, do they work in the manner I mentinoed above, also
If a user has no create/drop table privileges can they still use gloabal temp tables?
please help me.
You'll have to show some code or atleast some pseudo-code of how your process runs for anyone to help you. Having said that...
One thing that is different in oracle compared to temporary tables in other databases is that you do not create them each time you need them. You create them once and the data in the table is present either until you commit/rollback (transaction based) or until you end your session (session-based global temporary tables). Also, The data in a temporary table is visible only to the session that inserts the data into the table..
If you are generating the output files once and you don't need that data later, then Global temporary tables would probably fit in cleanly, with some minor changes.
Since you do not create the temporary tables each time you use them, you don't need the create/drop privilege. All you'd need is the insert/read privilege. Just read will not help because you cannot read another session's data anyways, so there is no use for it.
We have an application that creates new tables at runtime, but always with the same table schema. The only thing that varies from one of these tables to the next is the table name. Is it possible to access these tables using Entity Framework, specifying which table to access by name?
Entity Framework is not designed for DDL, it's an ORM tool for data access. You would want to use a simple ADO.NET query to create/drop the table.
Creating and dropping tables for every user session will make your log file grow very big very fast. I would consider carefully the reasons you think this is necessary. If the data is temporary, why not save the Session ID in each row and truncate the table on a daily basis?
UPDATE:
No, not really. The Entity Data Model is not dynamic, it's a static XML document that describes the structure of the database. If you want to interact with a table with a dynamic name, you're going to have to stick to "classic" ADO.NET.
With Linq to SQL I guess it would be possible with a stored procedure taking the table Name as a parameter.
A nice post about SP in L2SQL: http://weblogs.asp.net/scottgu/archive/2007/08/16/linq-to-sql-part-6-retrieving-data-using-stored-procedures.aspx
I don't know if that feature exists in EF.
What apps or tools do you use for data entry into your database? I'm trying to improve our existing (cumbersome) system that uses a php web based system for entering data one ... item ... at ... a ... time.
My current solution to this is to use a spreadsheet. It works well with text and numbers that are human readable, but not with foreign keys that are used to join with the other table's rows.
Imagine that I want a row of data to include what city someone lives in. The column holding this is id_city, which is keyed to the "city" table which has two columns: id (serial) and name (text).
I envision being able to extend the spreadsheet capabilities to include dropdown menu's for every row of the id_city column that would allow the user to select which city (displaying the text of the city names), but actually storing the city id chosen. This way, the spreadsheet would:
(1) show a great deal of data on each screen and
(2) could be exported as a csv file and thrown to our existing scripts that manually insert rows into the database.
I have been playing around with MS Excel and Access, as well as OpenOffice's suite, but have not found something that gives me the functionality I mention above.
Other items on my wish-list:
(1) dynamically fetch the name of cities that can be selected by the user.
(2) allow the user to push the data directly into the backend (not via external files/scripts.
(3) If any of the columns of the rows of data gets changed in the backend, the user could refresh the data on the screen to reflect any recent changes.
Do you know how I could improve the process of data entry? What tools do you use? I use PostgreSQL for the backend and have access to MS Office, OpenOffice, as well as web based solutions. I would love a solution that is flexible, powerful, and doesn't require much time to develop or deploy (I know, dream on...)
I know that pgAdmin3 has similar functionality, but from what I have seen, it is more of an administrative tool rather than something for users to use.
As j_random_hacker noted, I've used MS Access for years (since Access 97) to connect to an ODBC Data Source.
You can do this via linking to external tables: (in Access 2010:)
New -> Blank Database
External Data -> ODBC Database -> Link to Data Source
Machine Data Source -> New -> System Data Source -> Select Driver (Oracle, or whatever) -> Finish
Enter a new name for your DSN, the all of the connection parameters, then click OK
Select newly created DSN, hit ok.
You can do so much once Access sees your external table as a linked table, including sorting, filtering, etc. There's one caveat: as far as I can tell, ALL operations happen on the client side unless you're using a pass-through query. That's fine if you're looking at a table with 3000 records. With 2,000,000 records, that hurts. To be clear, all data in the table comes down to the workstation, for all tables being joined, and the join happens client-side, NOT server-side.
There are usually standalone tools for basic database management - e.g., for Oracle and MySQL a free tool called SQL Developer suffices for basic database data entry.
For more complex types (especially involving clobs) I can usually knock an application together in Java+SWT in a day if we already have the model and DAOs available on the Java side. Yeah, you have to put some effort in, but if it will be used regularly in the future then it is probably worth it.
In your case (well, the case where you have bulk imports of data) knocking up some Perl that reads from the CSV and does the city id lookup would be trivial to implement. Maybe a waste for a one-off thing? Depends on the amount of data to import.
I would be surprised if MS Access can't do what you're looking for -- this is basically the exact use case for it. Namely, quickly throwing together a nice UI for a simple CRUD DB application that a spreadsheet doesn't quite stretch to.
This is an answer, technically, but not a recommendation:
I've used Excel and SSIS for importing simple data entry files into MS SQL, but it's not adequate - there's very little ability to control the data, and SSIS is so very touchy, especially when working with Excel.
MS Access does not work well with some non-Microsoft databases. There is an open-source equivalent called Apache OpenOffice Base you may want to try.