Unsplit access database - workable solutions
Can you unsplit an Access database?
Access Database can be split into either a front-end application or a back-end application. After this splitting procedure, back-end database contains tables and it gets stored on file server. Whereas, the front-end database links contains all the forms, queries, reports, macros, and modules.
Hi everyone, thank you for joining us for a article on Mike Accessing Shared Databases in this article I want to discuss what we mean, let's say split in an Access database. You like to talk about why you want to split an Access database, and then we'll go ahead and talk about the different ways I've hosted databases and what a split database deployment looks like. So let's start with what we mean, we're talking about splitting an Access database.
Here is a picture of a database that has not been split. We have a single Accessdatabase file and an ACC DB file and it contains all the different things you would expect in an Access Database You have Forms Reports Code modules Macros Queries Tables are all the same single file This is a good arrangement you have a single user database that you will be using say your machine for your personal use or someone else's single machine for their personal use so in a shared database design we have at least two databases involved, we have a front end database we have hold our forms or reports, our code modules and macros and our queries and we have what is called a back end database that just contains our data tables, not necessarily all of the data tables, but each of the data tables expects your dinner to change often and then what we do we link the frontend database with the backend database, do we do that and we will see that in a later article, but we create linked tables there so that you have table entries in the front end that look like tables but actually refer to the tables that are in that back end-enddatabase There are several Reasons why we want to do this. One reason would be if you have a multi-user environment where you want a lot of people to share a copy of data that you know, for example, you don't want someone who changes data in person B to not see that change Data Another reason you might want to do this is for ease of deployment when you have a single database that holds all of your reports and modules and tables form in a single database and let's say you are like me and you do You develop on a machine at home and you deliver your changes to someone's workplace.
I mean, if you deliver, he will carry an Access database with him, either on an installation package or on a drive or something similar if your customer has one only Access database that contains data that you cannot easily replace with your version because your version will have the same data in these tables when it have been using them in the past two weeks while you code, they have added more data and changed data in these tables that you haven't reflected in your version of the tables. So when you get to your client's location, you have to import and import the changed forms from your computer from your copy to their copy to change reports and so on etc etc making it harder to deploy in a split design like this, all that user interfaces -Stuff is not a front end and all the data is in your back end which you can take with you Our copy of the front end so replace your copy with yours and you are good you have your data next for a much easier one Deployment Untouched One more note about the shared database design This design is a little more complicated for this to work, if you have a multi-user environment for this to work, this guy has to be in some sort of central location so you will likely get one Need some kind of file server to sit on, whether it's an external drive, any of the? Reach office or if you have a full network with a network server this guy has to sit in one central place and the rest of these people and then their finances can get paid, so we talked about what a shared database is. Now let's talk about what it might look like when you deploy it and what I want to start with is that I want to go over several types of deployments that I've seen, and start with a singlecombine database like this one, and become one skip complete file A sophisticated, multi-user split database design, more like a client-server arrangement, often has a single combined database hosted on a single person's PC.
For example, I have several Access databases that I have at home and I keep track of things just for myself and no one else has to see them for them to sit on my computer, they could be combined and there isn't one Problem with the fact that the complexity increases. You could put a single combined database on multiple machines, but if that person updates data in their copy, those two people won't be able to see that change of data, they know they are for a copy and their data is updated and you know these guys are seeing it can, either now you're in a mess, okay and and don't try to resort to replication now as replication is out of date in version 2013 can't be a member of the cool programmer club okay please please don't here is a C one combo database that we put on a file server and we have multiple users w with shortcuts to this copy on the file server, we have multiple people opening the same combined database. Now I've seen a successful implementation this way and that's why I think it works because it's rare that two people have B logged into this database at the same time, if you expect multiple people to be there at the same time, it probably will don't work for you Multiple people log into the same UI and interact with the same UI elements the same forms and what not I have seen corruption have occurred and these databases are getting locked, but one of these types for example this type often gets the Blue screen of death, sometimes there is a network hiccup and you lose connection to your file server in the middle of a race and I've seen these databases get blocked and when that happens you need to have some kind of backup that you are active and the database is sometimes completely replaced to make it tricky whoever den can that will work for you i would say in probably in ar there are cases when it will be a very low volume low usage the situation and again when you have that single copy updating that copy you have the same problems where you discussed how you are going to deploy your king here I created an Asplit database and put both databases on a file server so you have multiple users, all shortcuts point to the same front end in the same user interface elements and it's fun and of course pointing back to the backend database with tables similar to the problems you'll have with this one, okay you have multiple users logging into the same front end database so you become potential again Corruption problems if these guys had problems with our machines while they were doing something on their computers in this database k it can be locked and damaged and destroyed.
You need to replace Replace this copy to fix network issues but it was not said that I have two installations in the area of the same database, both of which are this agreement that they are from a Citrix server service, and Citrix takes care of all of these splitting different copies to different users, this works very well, I've never had a corruption problem with any of these customers and they have had this exact arrangement, but it's Citrix that handles it, different users different To give copies when they need it. This version works pretty well and our final arrangement or paradigm, if you will, is just a split database design that emulates a client-server arrangement and here we put a copy of the front end on each user's PC and then we have the back end even on the file server using these funends and being connected to the backend over the network is faster than this if you have the money on a server so these guys can open the database, even the database pretty far up front and needs to be over the network going into this user PC before at the end of their instance of access they even want to start and run all the forms or all the forms they want to use in the code models and connect to the network before they can actually use the database, every time when they open a new form again the forms i search through and the query is run for it in this version you have not and I can say with certainty that I can say for sure from direct observation with these forms, and queries and reports on your hard drive speed up access considerably. I can see you speed it up visually and you do it that way instead of having both the front and back end on the same file server after everything is said nothing is clear, fine in this case, now we say we have an easier deployment since if I want to replace those fun endings I can just bring my new front end and copy these guys and that's true but that can get awkward, this is f ine, when there are 2 or 3 people and they are in the same office but what if you know 30 users that can get awkward the field where the users actually have two databases - the phone ends up on the computer, their tie points too what I call a version check and it will run and check that the other fun end on your computer is the same version as a master copy I have on the server nd the version checker opens this database and they start using it when it finds that the version on their computer is less than the master copy that I put here and the version checker made a file copy is rebooted under their computer them then But definitely if you go for a split database design I would encourage you to try this version, this version will I believe will be the fastest for you and in the end probably g I think they will find it faster and you'll be happier with it, okay, that's all I have for this article.
I wanted to outline what a shared database is and why we should do it and what it might look like in broad outline and the next couple of articles I intend to show how to split an existing database and how to create a shared database from scratch newly created. We are going to cover setting a password for our database and how to deal with it in shared databases and I want to show the VBA that we use to see the connection strings to our linked tables, that would be the link from our front end that is in the article points to the backend. After that I want to recap what we learned there about how to deal with the connection strings and see them and read text reading files from the Lastarticle series and we will create code that will run on startup and your front end will automatically match yours Backend can link databases, so for example I have a copy of a database on my home computer and it's linked to a database on my home computer and that's a completely different folder structure and my clients have their computers in their office, so of course don't take my copy of the front end and put it on your machine in the office, it can't find the back end and you're all in your office just looking for it, still looking for the links pointing to the back end Show my machine at home so that the code is executed and automatically finds the backend on your computer.
Your office just runs automatically, it does the ready Making updates a lot easier than having to read the link manually and use that link from Table Manager and after that I'm not sure I could make a article of this version checker, but I just discussed it a few minutes ago so hope you guys liked this article, I hope it brought you something thanks for watching and we'll see you next time
How do I rejoin a split Access database?
All you need to do is, in the front end delete all of the linked tables. Then go to IMPORT > Access > and then select your backend and select IMPORT instead of LINK and select all the tables.
How do I recombine a split database?
- Open the front end database.
- Open Link manager and delete all the links.
- then import the data from the original back end database.
- change the data source for all forms, queries reports etc to the imported tables ? Is my assumption on this step correct or is it unnecessary?
Sometimes the data you need is spread across two or more databases. While it is possible to split the screen to get a horizontal or vertical view of the data, it is often more convenient to simply merge the databases together to create a new file. Here's how you do it.
Open the database which will be your primary file, in which case I will be using the pooled transaction database. Now open the customer file and split your screen horizontally. When I look at these files, i can see that they both have a customer number field.
This is known as the key and is the data I'll use to make the association between these two files. To do this, I need to make sure these two fields are the same data type - which means both characters or both are numeric or whatever. Hover your mouse over the field headings in each file to view the data types.
In this case, both are characters so we can proceed to create a shortcut for this field, make sure the focus is on the aggregated transaction ons database by clicking the 'Header' tab, then the tab Click on 'Analysis' and click on 'Join' in the 'Link' group. The Join Databases dialog box appears. Make sure you have Summarized Transactions as the primary database.
In the Secondary database area, click Select to choose which file you want to link to Summarized Transactions.We want Customer. Select this file and click OK.
You have the option to choose which fields should appear in your output by clicking the Fields button. All fields are selected by default. Next, enter a name for your new database.
I call it customer balances. Next, you need to tell IDEA which field to associate the files with. Click the Match button and select the Customer ID option in the Primary field.
Do the same in the Secondary field. Note that the field names do not have to be the same, but the data type does. Click OK to return to the Connect Databases dialog box.
Lastly, you need to define what type of connection IDEA should make. There are five options which are best explained by hovering over them. Hover over each option and study the Venn diagrams and explanations that appear.
Select the All records in both files option and click OK to complete the link. Your new file should have 351 records. I mentioned history earlier in this article series and said that it records everything that is done to a database.
Let's open that up and see what it looks like, as well as some of the other information you can get from it. With customer balances as the active file, click History in the properties pane, expand each section of the log and see what information is available Here we have merged the two files, I can see that there are 351 records, that I have 10 mismatched records in the primary file and 48 mismatched records in the secondary file. The primary file was summary transactions and the secondary file was the customer database.
This means that there are 10 records in the transaction file for customers that are not in my customer file. The 48 secondary files mismatched aren't all that alarming - they indicate customers who haven't made any transactions during that period. Review the IDEA Script code section of history.
If you need to do that join task again, you can use this section of code to create a macro for it. Click Data in the Properties window to return to Data View. You've used history to learn more about your data, and now you want to examine the data to see the mismatched records.
Find record number 9. Notice that the CUST_NO1 field is empty. IDEA has a feature called 'Show All Records' that will help you identify any similar records.
Right-click in the space under Cust_no1 and select Show all records contained in empty brackets. A dialog box will appear. This dialog box works similar to setting filters in the Equation Editor, but provides an interface for creating the equation.
Click OK. You now have a subset of your data with the 10 records that did not have a corresponding entry in the customer database file. Note that the criteria created in the dialog box are also visible in the properties pane.
You could save this file if you wish . For now I'll go back to the full record, right click on the criteria link in the properties window and select Delete; repeat the process of isolating records, finding all customers who have not made any sales in the period, right click any entry in the AMOUNT_SUM column. Make sure the operator is the == sign and make sure the value is 0.00 and click OK.
You should have 49 records as shown in the IDEA window below.
How do I relink Access database?
- Select External Data > Linked Table Manager. ...
- In the Linked Table Manager dialog box, select a data source or individual linked tables. ...
- Select Relink.
- Whether or not Access locates the data source, Access prompts you for a new data source location.
What happens when you unsplit MS Access database?
Actually backend helps in protecting off your database design. And this unable user to directly access the tables via the interface objects in the front end. After unspliting MS Access database any of your users can alter or delete tables. So, unspliting the Access database has negative impact.
Can a access database be split into front end and back end?
But before that take a quick review over the Splitting Of Access Database. Access Database can be split into either a front-end application or a back-end application. After this splitting procedure, back-end database contains tables and it gets stored on file server.
Why did SQL Server split my access database?
Accidentally split the database using Access Database instead of SQL Server. Unfortunately, a backup was not done before the split and there are several program changes since last backup with a different file name. I need to run the front end on three computers and the back end on one.
What can I do about MS Access database?
That option is Access Repair And Recovery Tool for advanced troubleshooting and solutions of MS Access Database issue.