Its my intention to implement a History function in my database where users can see what records they've previously worked on. To achieve this initially, I created an extra field in the table they we're looking at and added their name from the login screen and timestamp to the record. This works, but the problem is if another user loads up the record, it overrides the last person since its just one field and its inconsistent.
So instead I created a new table and added their names and timestamps in there as a new line. The issue here is that eventually there's going to be 1000's of records in a table eating away at my hard drive space over time and eventually since the max for a table is 2GB, its just going to break one day.
After researching, Queries have a max limit, but you've still got to link that to a table that holds the data. I would like a table that contains, lets say 100 records, and at the 101st record, the oldest line is overridden and so on.
There's no code to share since my problem isn't with VBA, but rather finding a work around for this, I would of assumed this would be implemented into Access by default. I just have a table called 'History' and in VBA, an 'open recordset' function and '.addnew' 'User' and 'Date'.
You could use an After Insert data macro to remove the oldest row when a new one is added:
Related
I have an Azure SQL database, and my records inside table Spiderfood_RITMData in that database includes 13 different fields. Lots of stuff. I have confirmed in SQL-SMS that the records have data in each field.
There are way more items in the database than PowerApps can see using LOOKUP (1600-9000 records or more). However, I know FOR A FACT that there is only ONE record that has any given value in the NUMBER column. It's not a primary key, but it is unique in the table.
In PowerApps, I am trying to pull that field so that I can eventually parse out the individual items.
So, the commands I'm trying are:
ClearCollect(MLE_test1, Filter('Spiderfood_RITMData', "RITM2170467" in Number));
ClearCollect(MLE_test2, Search('Spiderfood_RITMData',"RITM2170467", "Number"));
However, the Collection results for MLE_test1 and MLE_test2 both are empty EXCEPT for the value of NUMBER. Say what?!
I'm trying to use the examples posted on https://learn.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-filter-lookup but I am honestly getting baffled by this.
How should I be formatting this call such that I can pull the whole record?
Big picture explanation: I need to do a lot of data LOOKUPS into my table Spiderfood_RITMData table, but it has way more than 2000 rows, and PowerApps will not perform the Lookup correctly. So my presumably smart idea is to create a MUCH SMALLER "version" of Spiderfood_RITMData as a local collection, using a more delegateable function (such as FILTER or IN). If I filter by all records containing the values of NUMBER, then I go from, say a 10,000-record SQL table to a 10-record Collection. And I can do LOOKUPS against that collection for the rest of the function (uh, I think -- I'm still trying to experiment accordingly). Please let me know if this is crazy or not.
LookUp is just used to get one record, instead try this:
ClearCollect(MLE_test1, Filter('Spiderfood_RITMData', "RITM2170467" = Number));
This gets a collection with all the items where Number is = to "RITM2170467"
Collections are limited to only 2000 records in each collections.
I had same issue. Go to App settings. Under Upcoming Features make sure Explicit column selection is turned off. Hope this does it for you.
I need some help and I know I am not the only one to deal with this issue but I am wondering if you might have some ideas on how to handle the situation of comparing two rows of data filling out start and end dates.
To give you some context, we have a huge hierarchy (approx 8,000 rows and about 12 columns wide) that is updated each year. Sometimes the values change and sometimes they don’t. When the values don’t change, then I don’t need to adjust the dates. When the values do change and a new row is added, I need to change the data.
I have attached some fake data to try and illustrate my data. I am building this in MS Access, so I think this is more of a DBA type question that is going to be manipulated via a recordset type method.
In my example I have two tables – Old Table and New Table. In each table there is a routing code field that represents my join field and primary key for this table.
The Old table represents existing data - tblMain. The New Table represents the data to be appended - tblTemp.
To append the data, I have an append query set up in Access. I perform a left join between the Old and New tables, joining on every field and append the rows that are null in the Old table. That’s fine and that is not where my issue is.
What is causing me issue is how to fill out the start and end dates.
So as you can see from my tables, we are running a zoo. Let’s just say for the sake of the argument, our zoo started off pretty simple and has become more sophisticated. We now want our hierarchy to expand out and become a bit more detailed as we are now capturing the type of animal (Level 4) and the native location (Level 5).
As you can see when comparing one table to another the routing codes are the same, so the append query has to have a join on each field. When you do this, you return the Result Table which is essentially the Old and New tables stacked on top of each other. You might think about a Union query but this is going to give me duplicates and I don’t want that.
If you notice in the Result Table there is a Start and End Date. Let’s just say I get the start and end dates via message box that pops up upon the import of the data and is held in a variable. I think there are dates in my real data but still trying to verify this.
So how do I compare (pseudo code for the logic needed)?
• For each routing code:
Compare Levels 1-5
If the routing code is the same but Levels 1 -5 are not the same
fill out the end date of the old record
fill out the start date of the new record
This idea of comparing two records and filling out a data is quite prevalent in my organization but I haven’t found a way of creating the logic that consistently works so any help or suggestions would be appreciated.
Old Table
New Table
Result Table
I want to delete all the rows from a table that haven't been red or haven't been created within the last year.
There is no column that indicates the last access date of a row.
Is there a way to accomplish this anyway the using some internal logs or anything like this in MS Access?
There is no way to do this. Access doesn't keep this sort of log (or any DBMS I know of).
You would need a "date_created" or "date_accessed" column to achieve this.
BTW, in a continuous form or datasheet view, all rows are read (or the filtered ones).
I have a table I imported from excel. Everything was imported as strings to get started and gradually the data types were fixed.
I am now going through the process of normalisation and to start I done a select distinct on a given row to extract out the columns that were repeated to another table with an id.
Now I am trying to replace every occurrence of the string in the original table, with the id of the corresponding string in the other table.
I can do it one by one with something like this no prob...
UPDATE myTable
SET myCol = REPLACE(myCol, 'String', 'Num')
and later convert the myCol to an int.
But having to run this, and various variations on it for every string in the system is very error prone.
For example, if I accidently use the same number twice, replacing every string...I cant tell anymore which recordset originally belonged to the first update, and which were the new ones. This is a problem when the dataset is as large as mine.
Is there some way I can combine this with a join on the tables and have the system automate the process for me. I can imagine with normalisation being such a big thing for the last 30 or more years, this issue must have been met and resolved by now.
Any help would be appreciated.
I have a table with a bunch of different fields. One is named period.
The period is not part of the raw data but I run a query when I import new data to the database that gives each record a period.
Now I need a delete query that will delete all the records that have the same period as what is selected in a combobox.
The values in the combobox come from a calendar table that contain all the possible values that could be in that period column at any time.
This is the basic query i thought would solve this issue but it tells me it is going to delete 0 rows every time I run it:
DELETE *
FROM PlanTemp
WHERE PlanTemp.period = Forms![Plan Form]!Combo163;
If you don't need the key field, just remove it.
Look at the "PROPERTIES" section and look at the column names.
Ether remove it there, or from your QUERY source.
You can also look at the Data section of the properties, and change your BOUND column, to Column 2... or whatever holds the data you want to use.