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This database will be used for a one time data transport to another system, containing order of a few million entries. A test with 2 million dummy entries already reaches about 1. Split the database into two files, continuing the indexing during the transition from file1 to file2, taking care of independence for the entries in related tables. I would like to get some feedback on these ideas concerning concept, performance and usability or if there are any other ideas about this.
The microsoft access 2016 limitations free is distributed over several sources MS Access. So it's a classical ETL process. The "Compact and Repair" command won't help, since it is really just the large amount of data, not a large amount of operations leaving behind a lot of junk. This is not an issue with separating the interface front end and data back end; I need to split the data backend itself due to the large amount of data.
You can't bypass the built-in limitation of an Access database. The Access Specifications state :. Note: You can work around this size limitation by linking to tables in other Access databases. You can link to tables in multiple database files, each of which can be as large as 2GB. Tip: For more information on reducing the size of your database, see Help prevent and correct database file problems by using Compact and Repair.
You can even go a microsoft access 2016 limitations free further and, as you have already mentioned, split the data and the interface. Split an Access database. Consider splitting any database that several people share over a network. Splitting a shared database can help improve its microsoft access 2016 limitations free and reduce the chance of database file corruption. After you split database, you may decide to move the back-end database, or to use a different back-end database.
You can use the Linked Table Manager to change the back-end database that you use. Because it is Microsoft Access, I would recommend sticking with microsoft access 2016 limitations free supported options rather than trying another solution that might or might NOT work.
We used microsoft access 2016 limitations free have an application microsoft access 2016 limitations free had the interface FE and data BE split. No noticeable performance difference, when hosted on a file server.
I don't think there should be a noticeable performance impact when you access multiple BE files containing the different tables. But having the BE on file shares will generally be slower than storing them locally. Tables can be attached from access via linked table to SQL Server. The advantage of this approach is that you can scale up to avoid the access file restriction yet still make use of all the work you have done in access. There are even wizards to assist with importing and upscaling from access.
Performance will be directly affected by your sql file, table and index design. But roughly speaking should perform as well, if not better than access. Basic tips:. Ensure each table has a primary key defined in microsoft access 2016 limitations free server.
Not just a unique index. Access wont allow you to update a sql table without a primary key defined in the linked table definition. The equivalent of an access autonumber читать полностью an identity column.
If you have staging tables страница duplicates its worth adding an microsoft access 2016 limitations free column as a pkey. If you are unfamiliar with sql server there will be a bit of a learning curve, but it will be well worth the effort. SQL comes with some powerful tools that open up a lot of options for you.
If this is a one-time transport, why are you using Access at all? Most any system will import from that format. Sign up читать далее join this community.
The best answers are voted up and rise to the top. Stack Overflow for Teams — Start collaborating and sharing organizational microsoft access 2016 limitations free. Create a free Team Why Teams? Learn more about Teams. Asked 5 years, 4 months ago. Modified 4 years ago. Viewed 61k times.
I came up with two ideas so far: Split the database into two files, continuing the indexing during the transition from file1 to file2, taking care of independence for the entries in related tables. Improve this question. HeXor HeXor 1 1 gold badge 1 1 silver badge 5 5 bronze badges. Add a comment. Sorted by: Reset to default. Highest score default Date modified newest first Date created oldest first.
The Access Specifications state : Total size for an Access microsoft access 2016 limitations free. Split an Access database Consider splitting any database that several people share over a network. Improve this нажмите чтобы прочитать больше. John K. I would highly reccomend migrating the back end to SQL Server. Basic tips: Create a user db with a decent file size, and set the file growth to be Mb or 1Gb. If you dont have access to a sql instance you could install sql express or developer on your pc.
Sir Swears-a-lot Sir Swears-a-lot 3, 2 2 gold badges 24 24 silver badges 44 44 bronze badges. I totally agree with you, this would be the best way to proceed. HeXor I think its worth lobbying management to make an microsoft access 2016 limitations free. Trying to work around this limitation in access will take more time introduce risk to your migration. You could implement referential integrity either in access or SQL using foreign key constraints.
However if i was doing it id use queries rather than force with constraints. CalZ CalZ 4 4 silver badges 9 9 bronze badges. Since this is used as a temporary database, merging different sources together and preparing the Input for consistency, duplicate removal, etc. That sounds like something you should be doing on the source, the target, or within an ETL tool built for it, but not in an Access database. If you really want to do it in a file, you could use SQLite.
Using a professional ETL tool would be overkill for this project size, and since we are talking about several different sources, which are prepared individually and then merged together as one database for transport. The final database will Import microsoft access 2016 limitations free temporary database, and is implemented by a different developer.
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