I would like to know how to get computed field in MS Access that shows maximum of a number or zero. I mean the function that is similar to the one in Excel Max(A1,0). How do I get this in Access expression builder?
I suppose the only problem you could face, is that if the field has a null value. To be safe, wrap the field with the Nz() function which replaces null to the given argument.
Max(Nz([YourFieldName],0))
When the field is numeric, the zero can be omitted.
Max(Nz([YourFieldName]))
SELECT IIf(YourField > 0, YourField, 0)
FROM YourTable;
This is what I had done, but i thought there was another way
Thank you very much for your quick responses
Related
As the subject expresses, I'm trying to sum the values of a string field where spaces may exist. It must be done this way, unfortunately.
The database is very old. The original developer chose to make all fields Text fields; to get over the null value problems, a function was written in VB6 to replace any null value with a space. This cannot be changed.
Fast forward to now, I'm trying to create a report that sums the length field without changing spaces to nulls first, and it should be done entirely through the control source property of the report.
I've added some of what I've tried below, but every time the report is run, I receive:
Data Type Mismatch
...and I'm not sure how to get around it.
Ideally, I'd like to keep the users out of the database completely, and just add a combo box that lists the reports created in the database so they can be opened by name without having to run any additional update queries first.
=Sum(IIf([MY_LEN]<>" ",DCount("[MY_LEN]","MY_TABLE"),0))
=Sum(Nz(Iif(Trim([MY_LEN])='',Null,[MY_LEN]),0))
=DSum("[MY_LEN]","[MY_TABLE]","[MY_LEN]<>' '")
=Sum(Iif(Val([MY_LEN])>0,[MY_LEN],0))
=(SELECT Sum([MY_LEN]) AS MyLen FROM MY_TABLE WHERE (((MY_TABLE.[MY_LEN])<>' ')))
Is this possible?
Can't compare anything to Null. Can't say If x = Null Then because Null is undefined. So you can't test if undefined = undefined. Use If IsNull(x) Then in VBA and Is Null in query criteria. Don't really need IIf() for Sum() aggregate, other aggregates such as Count or Avg would.
To handle possible space, empty string, or Null for a text field holding numeric data.
=Sum(Val([MY_LEN] & ""))
I have a parameter asking the user if they would like to "only" include project numbers below 5000.
If they say yes, then I need the parameter to adjust the project field to be <=5000. If they say No, then the project number field should be <=99999999.
I am not sure how to accomplish this, right now I have a dataset where project number = #projnum, and I have #projnum parameter with two values of Yes and No.
I attempted to put an expression on the dataset properties under that specific parameter as:
=iif(Parameters!projnum.Value=1, <9999, <9999999999)
but I get a syntax error when using the < sign. It will work with just a number.
Sorry, new to SSRS and cannot figure this one out.
Why not change your dataset query to use <=:
SELECT *
FROM YourTable
WHERE ProjectNumber <= #projnum
Then adjust your parameter values to the range values:
I have the details of my report being summed up in a summary expression, all works fine. The fields are decimal values of hours worked. Thus, the summary value is also a decimal value. I'd like to access the summary value and convert it to hours / minutes. I've labeled the express as "WorkTimeSum", but can't seem to get a handle to it, however. Fields! obviously won't work since it is a summary expression. I was thinking ReportItems! should work, but to no avail. How can I use this expression field (in a summary row) in an expression in the same summary row?
If I've understood correctly, you're asking how to reference the textbox containing the total work hours value so that you can convert it to hours and minutes using an expression in a different textbox?
You can use either ReportItems! e.g.
=ReportItems!Textbox20.Value)
or ReportItems("") e.g.
=ReportItems("Textbox20").Value
to reference the value of another textbox. Be careful with the names as they are case sensitive.
You can use aggregate functions in any expression. For example, in any header rows you can use the following expression to determine the total hours value:
=Floor(Sum(Fields!hours.Value))
Sum(Fields!hours.Value) is just the total hours in whatever context, e.g. the group total if it's a group header row; you can use this expression as an input in any other expression you require.
It sounds like your issue wasn't the conversion itself, so hopefully this points you in the right direction. If you need further information please specify.
I have a report containing a tablix. Some of the fields in the tablix contain no value upon report creation. I want to show '0.00' as a default in these fields.
I have looked at textbox properties > Number > "Show zero as" but no matter what I cant get them to show.
I have to admit that I'm a SSRS newbie so I might have overlooked something. I googled a bit around and found something about IF statements in the expression, but cant quite figure it out.
The table data in the tablix is floating-point numbers.
Any advice is much appreciated.
The problem sounds like they are Null, not zero. Try using an expression like this:
=IIF(IsNothing(Fields!MyField.Value), 0, Fields!MyField.Value)
So when it is nothing (that is, Null), you get zero, otherwise you get the field value.
You should change the SQL if possible otherwise Chris Latta's answer is best.
For example if you use oracle you should use the nvl(v1, 0) function, or the isnull(v1, 0) for MS SQL. Keeping it in the query will reduce required processing.
I had to use the literal value of zero to get this to work.
=IIf(Sum(Fields!NewCount.Value) = 0, "0", Sum(Fields!NewCount.Value))
add zero to the expression:
=Sum(Fields!NewCount.Value) + 0
Question: I want to use a VBA function in Access that is declared as type Long. I want to return an integer between 0 and 35 some of the time, but I also want to be able to return a blank or null or something like that most of the time. Is there a way to do this? What I have tried (variable = "" or Set variable = Nothing) just calls an error. This will be used in a query and will give the value for one column. I want that column to be type Long. If such a thing is not possible, I guess that is all I need to know, as I already have a different but less desirable solution. Thanks for any help.
Update: Of course, right after asking the question, I figured out a good solution. If I just do Range("whatever").Value = Range("whatever").Value in Excel, then it changes a left aligned 20 to a right aligned 20, at which time it is recognized by the pivot table as a number (though when I just convert the cell type to a number in Excel, it is not recognized as a number in the pivot table). So, I am deleting the background because it is not necessary. I am still interested to know if you can return some sort of blank or null for a function declared as long. Thanks
Null can only be returned from a Variant function.
Nothing can only be returned from an Object function.
All others, you are restricted to returning a variable of the type defined as the return value of your function.
If you do not set a value, then it returns the default value
A numeric variable is initialized to zero
A variable length string is initialized to a zero-length string ("")
A fixed length string is filled with the ASCII code 0.
A date/time variable is initialized to zero
Since an unitialized long has a value of 0, the answer is "no." A function declared as long cannot return null or blank. If zero wasn't a valid return value for your function, you could use it a "null" equivalent, but you already knew that :)