I am new to MS Access and have some three linked data tables. Say cars, sites and prices. The cars table has a link to sites and prices, wherein n cars can each have a link to one site and one place. I set "must be filled: false" for both of sitesID and pricesID fields in the cars table but this didn't help it, surprisingly! The issue that hit me while trying to add a car is this one:
https://learn.microsoft.com/de-de/office/vba/access/concepts/miscellaneous/you-cannot-add-or-change-a-record-because-a-related-record-is-required-in-table
So I am beginning to understand what went wrong, but I cannot undo my broken dataset, that is, delete it, or edit it, only thing I could be doing is shut down Access through the Windows Task Manager.
Any smart way out of this dead-end street?
Thanks in advance!
Related
I am attempting to recreate in MS Access a personal productivity database that I had in Notion (created based on this https://www.youtube.com/watch?v=32dLXdB4ozs). Basically I have a bunch of things (Projects, Meetings, People, Partners (which are orgs), tasks, etc.) and relationships between then. Each project has partners. Each meeting covers certain projects. People work on particular projects and for particular partner organizations, etc. Lots of these relationships are many-to-many.
I've set up most of the back-end stuff: I have a table for each "thing". I also have tables for each many-to-many relationship. So for example I have a People by Partners table to show which people work for which partners, a Projects by People table to show which people work on which projects. A Meetings by Projects table for which meetings are about which project...etc. etc. i have made each field in this a linked relationship to the other two forms. So for example, the projects by people table has a project field linked to the project page and a people field linked to the people table. I've set all of these relationships to have data integrity and to do cascading updates.
Now I'm creating the more interface-like part, which will be used both for viewing and entering data. So I'm starting with a project form. In the project form, I'm putting a sub-form that will list the partners on that project. I created that form based on this video (https://www.youtube.com/watch?v=N46mgIqLXbA&t=0s) which you probably can't see, but the basic idea is that it's a combo box with the record pulled from the partner table and then the update linked to the partner by project table. I have set this to pick from a list since there are a limited number of partners.
Ok, now here's where I'm running into a problem:
I want to set this so that if I enter a partner name not already on the partner list, it gives me the option to add it as new. I've set it up using this code: http://msaccessgurus.com/VBA/Code/Combo_NotInList.htm . T
he code works fine (* sort of, see next para) if I do it directly to update one of the original tables (e.g. Partners), but I need it to update the Partners by Projects table.. I need it to put in the new Partner name, link it to the currently-viewed project, and then from there update the Partners table (which I thought would happen with the cascading updates).
Instead if I enter info not on the list, it asks me if I want to add it and then when I say yes, nothing happens. It doesn't add. In the form field, it shows me the dropdown list of existing partners to pick from. It tells me there's a syntax error and the error seems to be somewhere in the error proc.
How do I get this set up so I can enter the names of new partners and it will appear correctly as added wherever it should appear? Obviously the partners/projects is just one case where I will need to do this, so i need to figure this out or the whole system can't work!
Thank you for any help. Please note: I am not a professional (or even particularly skilled) programmer. My job is something else entirely and I am a muddling amateur with a basic understanding of programming and database concepts and some minor experience with other programming languages, but absolutely nothing with vb.
I have years of Access programming under my belt, with either Access or SQL back ends. I'm volunteering my time to help a small nonprofit build a volunteer database. We are forced to use SharePoint Lists as the data backend.
Our first migration using the Access wizard worked but messed up the data because I had not created all the required relationships prior to upsizing. I did my homework, and we tried again. But even though we created a folder for all those files, the Access wizard put the lists at the root of the SharePoint file, and now they are mixed with the first round of tables, as well as other folk's stuff. So, my questions are:
Can we specify where those SharePoint Lists are stored beyond the root directory? (I worry that others may inadvertently edit those lists...)
How do I delete the lists? It says we cannot because relationships are set
How do I in the future alter the lists (like altering tables in SQL?) I know I'll need to add columns eventually.
I've searched MS and here, and MS solutions are crazy simplified, so they don't answer my questions. TIA!
Can we specify where those SharePoint Lists are stored beyond the root directory? (I worry that others may inadvertently edit those lists...)
Yes, go to the SharePoint site. From ONLY the Team site, create a sub site.
(regular sites don't work - MUST BE A CHILD of TeamSite).
You can up-size the access tables to that site.
So, just like creating a folder, or in this case a site?
Say you create a new teamsite (MUST be subsite - so crete a subsite to teamsite) called Customers. Then you can specify that target for the database. As noted, since the access table features are "special", only sites created as sub sites to TeamSite(s) will work.
So, it stands to reason that each database should get its own site (perhaps better term is sub-site). Then you can up-load/up-size a database to that one team site you just created - and all tables are thus "grouped" or part of that "one" site or URL.
So say we have a database called customers - then we create a (sub) site called customers. Your url would thus be "something" like this:
https://myCompanyName.sharepoint.com/TeamSite/Customers
How do I delete the lists? It says we cannot because relationships
Well, actually, even in Access regular tables - you as a general rule can't delete a table that is part of a related set of tables. This suggests then you have to delete the relationships first.
Display the site contents,
right click on the child table that has the related column
(choose settings).
You now are in the "settings" for that one table/list.
You can click on the column that has the relationship.
You see this:
So, you can remove the relationship. (scroll down to bottom).
And if those tables are LINKED from access?
You can use the table view in Access - and change/add columns - you do NOT necessary have to do this from the web interface.
How do I in the future alter the lists (like altering tables in SQL?) I know I'll need to add columns eventually.
You can do this from Access or SharePoint - Access side is better choice.
if the table is linked from Access, then use the table view. You not be able to jump into table design mode - but if you open a table, you see this:
And while in above I am on the last (add new) column, if I wanted to say change or add a index to say FirstName column? I could do this on SharePoint, but you ALSO can just click on any column - note the ribbon now:
So, all this is quite much basic SharePoint stuff.
But, open the linked list - you can add new columns, or remove columns - the above ribbon options show the options you have (such as index, etc.). And like always, to delete a column, in that table view from Access, right click - you have this option:
So, you add, or delete fields BOTH from the SharePoint site, or from the above table view in Access.
I am struggling with an issue in designing my Access database.
I am a caregiver, and part of my job is taking clients out into the community. I am attempting to build a catalog of outings to help the employees at our company come up with and store ideas for these. I want to store information for each of up to 5 types of events that clients can do at a location. That information includes the event type, when it runs and doesn't, and how much it'll cost, all of which would be user-selectable. (Separately in the same table, I want to include contact information and information that helps the user search for event locations, such as the ZIP code.) I have attempted to normalize the database by spreading event information across fields in the main table, linked to lookup tables. I am aware that Access has a limit of 32 relationships per table.
To help staff find event types, I am trying to set up a method for categorizing them. That requires setting up nested lookup tables, as shown in the first picture.
If I understand correctly, the additional "copies" of those lookup tables are aliases. When I save the setup for the relationships between those aliased lookup tables, close the Relationships window, and open it again, I find Access has changed them, as shown in the second picture. This happens whether I delete the lookup table information for each field in Datasheet View. I don't understand why it does this or how to fix it.
To answer your question:
In the object browser I see that you have only one table: t_OutingType. Therefore, the "tables" t_OutingType_2, t_OutingType_3 are just aliases; "pointers" to the same table (like a shortcut to a document). When you save the relationships and close the window, the relationship information is written to the metadata of the database. When you re-open the Relationships window Access re-builds the relationship diagram from the metadata, and it does not include the redundant aliases.
Additional advice:
Whenever you find yourself duplicating columns in a table, e.g., Event_1, Event_2, ... a little voice in your head should start shouting "Are you sure that's a good idea?" Imagine if you want to search the database for events that fall on a certain date. With the table layout described above you would need to ...
SELECT ... WHERE EventDate_1 = [theDate] OR EventDate_2 = [theDate] OR EventDate_3 = [theDate] ...
It's almost always better to split the Event information into a separate child table and maintain an association table between the child table and its parent.
In my MySQL database I have a table of products which contains almost 625k rows. The table has 162 columns.
Now there is a search box on my home page where you can search for anything and, if your search term is matched from any of my product titles, it give you a list of 15 products. This is similar to Amazon and other e-commerce websites.
What I did so far was to create a JSON file with all the product ID's and title names. When user inputs a minimum of 3 chars into the search field, an AJAX request is made and gets the list. But my issue is that the JSON file is almost 12MB in size, and the ajax calls it whenever user write's a char or removes a char. It was working fine until I was on local Machine and now as soon as I made it live it doesn't work for users, having lower then 5 MBPS internet connection. So I am looking for some advice, how do I create it fast as Amazon. I mean the search with auto suggestion from 625K products.
I am really sorry, but there is nothing more to give as an advice here then "go do some reading on database design and schema normalization".
If you have 162 columns in a table you will never be able to do an efficient search. The database (especially MySQL) will not hold the table in memory and indexes will not help either. Yes, you can throw it all into an ElasticSearch instance and it will fix some of your problems. But, honestly, this solution does not clean up the mess you have.
You should have a table with relevant information (titles, names, etc.) in one column (or also a numeric column for prices, etc). This metadata should reference the main table, the column should be fulltext-indexed. This way you ask for matches, filter results and JOIN relevant lines from the main table. This will work quickly with very little resources used.
I'm not a coder (just a script fiddler) and I've got a particular problem with Magento that I cannot explain in terms of code or data, so I need to explain the situation.
I sell configurable products that come in an array of options. These are furniture products that use various codes that describe the final SKU of the product. I've never fully written or listed every possible SKU outside of any e-commerce product I've used, but always used the in-app options, in Magento's case, custom options, to create an SKU as the customer orders the product.
Now I'm facing a nightmare as I'm finally getting a QuickBooks solution mapped out for our company, but I need to get a file with every possible SKU# to import into QB, so that we can use a download routine (ecc) to grab all the orders from Magento and pop them into QB without having to create each new product on the fly. Each one of my products has the following choices:
BaseSKU#
FinishColorSKU#
FabricComboSKU#
FabricColorSKU#
So, for instance, I sell a chair. The chair's base SKU# is 708. The chair comes in 7 finishes, each with it's own code, so now I have 7 SKU's. Each chair+finish comes in 5 fabric combination styles. Not actual fabric, just the way it's applied to the chair. So 7*5=35 is no problem. Now it starts to get tricky. 2 of those fabric combo styles use only 1 fabric. We have 60 fabrics. 35*60=2100. At this point, this is not impossible to create in excel, a bunch of copying and pasting, but it can be done. Now the other three fabric combo styles use 2 fabrics. I need to create a SKU for every possible combination of fabric. So 60*60=3600 possible combinations of the fabrics alone. Now combine that with 35 different chair+finish combo, that's 126,000 possible SKU's for one product. Multiply that times 300 products, there is no way I could do this by hand in Excel. The final SKU looks like these:
One color chair:
708-117-SC-5708
Chair708+Frame117+SingleColor+Color5708
Two color chair:
708-117-DC-5708-5709
Chair708+Frame117+DualColor+Color5708+Color5709
Now, since these possible combinations exist in the Magento Database, just not combined, is there any way to programmatically create all possible combinations and lump them into an Excel file, or csv, or ANYTHING? Is this possible in Excel? Maybe I just need to download the database, export the right table to Excel and do it there.
Any help would be really appreciated.
EDIT: Was thinking about this, and maybe the simplest way to ask this question would be:
How to make Magento output a list of all possible products and options?
You can use the export functionnality: System -> export/import -> dataflow - profiles -> Export All Products. It's pretty straight-forward to use, but feel free to ask if you need more help.