I would like to use a function in the criteria section of my access table. Is this possible? I want to make the criteria area dynamic, so I thought if I add a function from a module it could work.
Yes you can use a user function (or any other VBA function) in the criteria of your queries. Just be mindful of the fact that it will pull the data down locally to do the filtering work so if that is your only filter criteria and you are querying a large table over a network you might run into problems
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We are using Excel 2013 and Power Pivot to build modules that consist of several Pivot tables that are all pulling data from the same Power Pivot table, which queries our T-SQL data warehouse.
In an effort to simplify and fully automate this module, we wanted to create a text field that would allow a user to enter a value (a client ID# for example), and then have that value be used as a parameter in the Power Pivot query.
Is it possible to pass a Parameter in the Power Pivot query, which is housed in a text field outside of the query?
You can also pass a slicer or combobox selection to a cell. Define a name for that cell. Put that cell (and others if you have multiple text variables to use) in a table. For convenience, I usually name this table "Parameters". You can then 'read in' the parameters to your query and drop them in your query statements.
The code at the top of your query to read these parameters in might look like...
let
Parameter_Table = Excel.CurrentWorkbook(){[Name="Parameter"]}[Content],
XXX_Value = Parameter_Table{1}[Value],
YYY_Value = Parameter_Table{2}[Value],
ZZZ_Value = Parameter_Table{3}[Value],
Followed by your query wherein instead of searching for, say a manually typed in customer called "BigDataCo", you would replace "BigDataCo" with XXX_Value.
Refreshing the link each time a different customer is selected will indeed be a very slow approach, but this has worked for me.
Rather than pass a parameter to the data source SQL query, why not utilize a pivot table filter or slicer to do allow the users to dynamically filter the data? This is much faster than refreshing the data from the source.
If for some reason you need to pass this directly to the source query, you'll have to do some VBA work.
I apologize if this is an easy one, but I can't find this on the web anywhere!
I have a list of tables and queries, and a full list of fields from each table and query.
I want to choose my fields in an Access form, and then, on another form, choose a query/table in one column (along with a field) and join it to a table/query in another column (along with the field.) My form for the joins would look like this:
Object1 Field1 Object2 Field2
and so on. I would want to be able to choose my fields through combo boxes, THEN make the SQL string dynamically. I can't use a where clause -- it has to be a join.
The problem is, the structure will change every time. Access gets funny about putting in parentheses. Also, if an object is chosen more than once, Access will want to join it (assuming I do it right) in a different manner than T-SQL.
Is there a way to write a query in T-SQL, and quickly convert to Access? Does anyone know the FROM clause algorithm Access uses to construct the FROM clause? I am stuck here, and I cannot find a solution to save my soul! Thank you in advance, David
tldr: Can not update records from query because of aggregate functions. What workarounds do you suggest?
I have a table containing decision criteria to which a user can assign a relative weight. I calculate the absolute weight in an SQL query using an aggregate function (as described here Divide the value of each row by the SUM of this column).
qryDecisionCriteria
name relative_weight absolute_weight (calculated)
price 2 50 %
quality 1 25 %
experience 1 25 %
I would like to present the query result in a form, where the user can update the relative weights, and then sees the absolute_weights.
However, the query results are not updatable, because the query involves an aggregate function.
What alternative methods or workarounds could I use, so that a user can edit relative_weights and view absolute_weights as a kind of visual feedback?
I read about temporary tables here http://www.fmsinc.com/MicrosoftAccess/query/non-updateable/index.html but I'm not sure, how to implement this.
Maybe I could also create an additional "edit form" based on a simple query, that is automatically invoked when the user selects a record in qryDecisionCriteria data?
Or maybe just display data from two queries (one updatable, one with the calculated field) next to each other in the form?
Which options would you recommend and why?
Make the Record Source for the form the updatable base query. In the text box which shows the calculated absolute weight set the control source to
=DSum("relative_weight","<base table name>")/Forms!<Form Name>!relative_weight
You'll need to be sure that you do two things with this
When you drag fields onto a form in Access it makes the name of the control the same as the control source column. this is really annoying and can cause a lot of headaches. Rename your control to something like txtColumnName. That way Forms!<Form Name>!relative_weight is guaranteed to reference the field and not the textbox.
in the AfterChange event for the relative_weight textbox you should add an event handler in which the following code is run
txtabsolute_weight.Requery
This will make sure the formula is recalculated whenever someone changes a weight. Otherwise they need to hit F5.
Does any one know if there is a way to import a spreadsheet into report builder 2.0 and then use my data set to make calculations against.
This might seem like a novice question as my limited experience of report builder does not help.
The reason i want to do this is so that i don't have to have my main data-set run the query on working out averages of hundreds of thousands of records as it take ages to run. by having the benchmark average data static i would want to run my query and do the calculations in report builder which will make it a 100 times faster.
Thank you for your time in advance
You may be able to overcome this by adding Calculated Fields to your dataset (DS). I am assuming that your static data can be related to your dataset by using at least one existing field. Using the Switch function, you can populate your calculated fields. Switch “evaluates a list of expressions and returns an Object value corresponding to the first expression in the list that is True.”
You can use the function like this:
=Switch(Fields!DsField1.Value = 2, “Your Value1”, Fields!DsField1.Value = 5, “Your Value2”, Fields!DsField1.Value = 10, “Your Value3”, ….)
If you have any condition that needs to be checked, you can add it before the Switch statement like this:
=IIF(Fields!DsField20.Value <>1000, Switch(Fields!DsField1.Value = 2, “Your Value1”, Fields!DsField1.Value = 5, “Your Value2”, Fields!DsField1.Value = 10, “Your Value3”, ….), Nothing)
You can have your values in an Excel sheet to make the creation of the formula easier. Simply create your formula in the first row, copy the row down to extend your formula, and cover all your values. Then from Excel simply copy and paste the column of data into your calculated field(s).
Here’s an example of My Excel formula. This is the best I could do as I could not paste the sample here. You can copy and paste these and replace them your own values.
In Cell-A2 2
In Cell-B2 YourValue1
In Cell-C2 YourOtherValue1
In Cell-D2 YourOtherOtherValue1
In Cell-E2 YourOtherOtherOtherValue1
In Cell-F2 ="Fields!DsField1.Value ="&A2&","&""""&B2&""""&","
In Cell-G2 ="Fields!DsField1.Value ="&$A2&","&""""&C2&""""&","
In Cell-H2 ="Fields!DsField1.Value ="&$A2&","&""""&D2&""""&","
In Cell-I2 ="Fields!DsField1.Value ="&$A2&","&""""&E2&""""&","**
Sorry if there is anything I have missed; I did this in a rush.
Report builder doesn't have anywhere you can 'import' the spreadsheet to, except one of the databases you are querying from. And Excel isn't a supported data source for SSRS, however it might be possible to add a report data source that uses an ODBC DSN to the appropriate Excel file. (I haven't tried it).
But, I can foresee some problems with this approach - it may get upset under multiple users and I expect you may find the file gets locked so you can't update it very easily.
An approach that might work could be to upload the static data into an Access database (as that is supported via the OLE DB Jet provider) and reference that as a data source; but the best approach is always going to be importing the static data into a table in your main database and using that.
I am using RavenDB to store data in documents which I want to query later dynamically for generating some visual charts. I have an ASP.Net interface where the user can apply filters, include exclude certain criteria. This is a normal requirement in search pages and I thought RavenDB is perfect for it. However I am not sure how to generate the filters dynamically, do I need to create index on all fields in advance?
In one thread I read about LuceneQuery but there is no simple example out there documenting how to apply and remove filter criteria dynamically via LuceneQuery.
Kindly help and suggest how I can implement it. With Entity Framework I simple used to build the expression dynamically based on some values and then pass it in where clause.
Update: Ok so to be more specific I have a page where I am generating charts using dynamic queires. User has multiple filters that he can modify like, Year From, Year To, Category, Sub Category, Sales By Specific Salesman etc.
All this data is stored in one table or document so to speak. I want to group data based on user filters which can only be determined at run time, then execute a query that fethches result using "AND" operator among the filters. So that only those records that exactly match the criteria (Not the scores that Lucene calculates during search) are grouped and summary is returned so that I can generate charts on them. Hope I made sense this time