This post is related in several aspects to the following:
Selecting all columns that start with XXX using a wildcard?
I am currently using Access 2010. I would like to add new columns to my table, based off values of the other columns.
Current table (Table #1):
Row | PlaceID | FoodItem1_10 | FoodItem1_02 | FoodItem2_10 | FoodItem2_02
001 Park Y N Y N
002 Library Y N Y N
003 Museum Y N Y N
Where:
Item1_10....ItemN_10 is a field where a value of 'Y' (for Yes) is assigned if, at a particular location, they sell that food item only 10 months of the year. Otherwise, the value is 'N' for No.
Item1_02....ItemN_02 is a field where a value of 'Y' is assigned if, at a particular location, they sell that food item only 02 months of the year. Otherwise, the value is 'N' for No.
I want to add columns to Table #1, and have it look as follows:
Desired new table (Table #2):
Row | PlaceID | FoodItem1_10 | FoodItem1_02 | FoodItem2_10 | FoodItem2_02 | AnyItems_10months | AnyItems_02months
001 Park Y N Y N Y N
002 Library Y Y Y N Y Y
003 Museum Y N Y N Y N
Where:
AnyItems_10months is a field that captures whether or not a particular place sells any items for a 10 month period. This field takes the values 'Y' for when, in any column, the particular place has a value of 'Y' for columns Item1_10 ..... ItemN_10.
AnyItems_02months is a field that captures whether or not a particular place sells any items for a 02 month period. This field takes the values 'Y' for when, in any column, the particular place has a value of 'Y' for columns Item1_02 ..... ItemN_02.
What I have been trying:
Since my columns follow a particular naming pattern, I thought it would be best to use a wildcard to generate my two new columns as such:
Obstacle
-Access does not accept my expression.
Why don't you just hard-code it into a query? You're not going to be able to make a field like that in a table without reading the .Fields property of the table. It would get really messy. If you're always going to do it the same way, doing it in a query is going to be the easiest way.
Related
I am using MS SQL Server DB. I have a specific need to find out groups of interdependent items. Visualize below a scenario where we have two items in each row, one is source item and other is destination item. Any item can be source of any item, and same for destination as well. We have two column in the table, 'Source' and 'Destination'. Let's consider 10 values in the table as below:
Source | Destination
A | B
B | C
C | D
E | A
D | E
X | Y
Y | Z
Z | X
P | Q
R | S
My requirement is to get distinct groups of items with Source and destination. Meaning, my query should return below result with 4 rows (grouped items in comma separated form):
RowNum| Result
1| A,B,C,D,E
2| X,Y,Z
3| P,Q
4| R,S
Here, the level of hierarchy can be upto n number. In my example, I kept the first group of 5 items (A to B, B to C, C to D, D to E and E to A - Means 5 different items are involved in this group). But the data may have more items as well, in single group. Also, cyclical records are possible (X to , Y to Z and Z to X)
I can achieve this using nested WHILE Loops. But, as we have thousands of records, the nested WHILE Loop scripts takes too much time to execute. I am iterating one loop on each record of the table and then there is an inner loop which will take outer loop's record and will compare it with all other records.
Can anybody suggest a better way or algorithm to achieve this?
Any help on this would be appreciated.
I’ve run into a problem, as I cannot get a proper working LINQ statement here.
Suppose I have a DataTable with x rows and I have to sort based on the sum of the Quantity column. Then I have a condition Requested Quantity = 20. I need to find the rows equal to the exact sum of RequestedQuantity, but only where the combination of 3 rows is equal to it.
+-----+----------+
| Bin | Quantity |
+-----+----------+
| 1 | 10 |
| 2 | 5 |
| 3 | 5 |
| 4 | 10 |
| 5 | 15 |
+-----+----------+
I can’t seem to figure out the proper LINQ syntax to get this to work. My starting point is this:
From row In StorageBins.AsEnumerable.GroupBy( _
Convert.ToDouble(Function (x) x("Quantity"), cultureInfo)).Sum( _
Function (y) Convert.ToDouble(y("Quantity"), cultureInfo) = _
Double.Parse(RequestedQuantity,cultureInfo))
Initially, I am just trying to get any rows that are equal to my condition. My end-goal, however, is getting any three rows that exactly sum up to my Requested quantity.
I’m not an expert in LINQ, unfortunately. I hope some of you might be!
Maybe I'm missing something, but this actually seems like a pretty complicated problem. Pick any 3 records, but only 3, that add up to exactly 20. How many rows are there in the database? Because this could get to be quite a few potential combinations pretty quickly. And what do you do after you get the 3? Do you have to go back through recursively and group up the other records as well? Or you just need the first set of 3 that add up to 20?
Assuming you just need the first 3, I would do something like this:
Get the first record that is less that 20. Remove it from your input list and put it into your target set.
Then get the first record that is less than 20 minus the first value. ie if the first value was a '5', get records that are less than 15 (20 minus 5). This ensures you 'leave room' for the third value. Remove it from the original list and into your target set.
Then get the first record that is exactly 20 minus number one minus number two. Remove it from the input list and into the target set.
Now you would have to do this in iterators. If there is no value that meets the third criterion, release the third value from your target set and put it back in your input list. Then go back to step 2 and pick the next record that matches step 2 (and ideally that is not equal to the previous value). And if you exhaust all of the iterations through step 2, go back to step one and pick the next value there, and start the whole thing over again...
Unless I'm misunderstanding your requirement...
I need to write a query that truncates based on a selection and outputs another table. The selection criteria is as follows: for each common ID loop through the AGREE column to find a Y, if no Y then output 0, if a single Y then output that year, if multiple Y then output the most current year.
Input table:
ID AGREE YEAR
1 N 2003
2 Y 2005
2 N 2015
3 N 2005
3 N 2007
3 Y 2011
3 Y 1999
4 N 2005
4 N 2010
Output table:
ID AGREE YEAR
1 N 0
2 Y 2005
3 Y 2011
4 N 0
Here is my solution:
Select id, max(agree), max(case when agree = 'Y' then year else 0 end)
from [input table]
group by id
It rests on grouping by the id field and using max statements to return a "Y" if it is present for the group, and then return the largest number for year when agree is "Y". Note that you say "most recent" - if this table contains years in the future it would not return the most recent but instead the furthest into the future.
Note: There is an alternate way of doing this that is often faster that involves using sub-queries. If you run into performance issues it would be worth pursuing.
I have a table built off a dataset containing timesheet data with possible multiple entries per day (day_date) for a given person. The table is grouped on day_date. The field for hours is effort_hr (see dataset and report layout below).
The table generates a single row with one column for each day (as expected).
For each day I want only one value (total hours for person) so the expression is Sum(Fields!effort_hr.Value) This is properly adding up all the hours for each day.
Now I add a total column at the end of the row to see ALL the hours for the whole timesheet. The expression in the total column cell is Sum(Fields!effort_hr.Value) which is exactly the same as the daily ones. Again, this is adding up all hours for the timesheet.
So this is working great.
I now need a new row that only shows a max of 8 hours per day. So if the person works less, it shows less, but if the person works more, show a max of 8.
In this case, the daily column expression is:
IIF(Sum(Fields!effort_hr.Value)>8.0,8.0,Sum(Fields!effort_hr.Value))
And again, it displays perfectly for each day.
The total for this row is where I run into trouble. I have tried so many ways, but I cannot get the total for the columns in this row. The report keeps showing an #Error in the cell. The report saves fine and there is no error in the expr.
The problem seems to come from the fact that there are 2 values for a given day. So in other words, for 5 days, the person has 6 entries. When I try it for a person with only 5 entries, no problem.
I have tried:
Sum(IIF(Sum(Fields!effort_hr.Value)>8.0,8.0,Sum(Fields!effort_hr.Value)))
RunningValue(IIF(Sum(Fields!effort_hr.Value)>8.0,8.0,Sum(Fields!effort_hr.Value)),Sum,Nothing)
I either get an #Error, or I get the wrong total. Is there any way to just get a total for the cell values in the table? The daily numbers are correct, just give me the total at the end (like Excel).
I could do this in the SQL, but that would mess up other parts of this report.
DataSet:
res_name | day_date | effort_hr
J. Doe | Apr 6, 2015 | 2
J. Doe | Apr 6, 2015 | 9
J. Doe | Apr 7, 2015 | 8
J. Doe | Apr 8, 2015 | 7
J. Doe | Apr 9, 2015 | 10
J. Doe | Apr 10, 2015 | 9
REPORT TABLE Layout:
| Apr 6 | Apr 7 | Apr 8 | Apr 9 | Apr 10 | Totals
Total | 11 | 8 | 7 | 10 | 9 | 45
Reg | 8 | 8 | 7 | 8 | 8 | 39
OT | 3 | 0 | 0 | 2 | 1 | 6
Problem:
Row 1 Column Total works great and gives 45 hours ;
Row 2 Column Total either gives #Error, 41, or some other wrong number - just need it to total the actual values of each cell in the row ;
same problem for Row 3 total
Thanks in advance for your time!
Posting another answer as the previous one has become so long.
I referred to this MSDN link, and used the selected answer. Apparently we need to use custom code to achieve this (if you are not willing to change your dataset and have the calculated values in there).
Right click on report --> report properties --> Go to tab 'Code' --> Paste this
Dim public nettotal as Double
Public Function Getvalue (ByVal subtotal AS Double) AS Double
nettotal = nettotal+ subtotal
return subtotal
End Function
Public Function Totalvalue()
return nettotal
End Function
In the row group expression of second row put
= code.Getvalue(IIF(Sum(Fields!Efforts.Value)>8.0,8.0,Sum(Fields!Efforts.Value)))
In the Total cell expression (for second row) put
=code.Totalvalue()
Save and run, you should see following result.
I used your input data and tried to create the report in given format. I used following function for Row 2 Total
=Sum(IIF(Fields!Efforts.Value>8.0,8.0,Fields!Efforts.Value),"DataSet1",Recursive)
This shows sum as 39 for second row. You can try and let me know if it works for you. If it doesn't I will list the exact steps how I created Matrix and groups.
Note: Don't forget to put your dataset name in the second argument of function Sum. And Recursive, as clear by name, applies Sum recursively for the group.
Update: I followed following steps.
1. Add a Matrix on the report.
2. Under Column group section on Matrix, Select any column name from the dataset. (Otherwise it won't show any columns in the next step)
2. Right click Column --> Add Group --> (Under column group) Add Parent Group. Select Day as Group By --> OK. It will create a new row. Put expression Sum(Efforts) in first row. And your expression =IIF(Sum(Fields!Efforts.Value)>8.0,8.0,Sum(Fields!Efforts.Value)) in the second row.
Right click on the column group section in the group pane --> Select Add Total --> After. It will add new column at the end of Matrix. Put expression Sum(Efforts) in first row and expression =Sum(IIF(Fields!Efforts.Value>8.0,8.0,Fields!Efforts.Value),"DataSet1",Recursive) in the second row.
Save and run you should see following in the report.
Remember to change the names of columns and dataset as par your code.
This is an idea on how to do such grouping, obviously you'd need to do changes for the headers and the 3rd row etc.
HTH.
I have crosstab which has row columns indicating different classes, and then peoples names across the top.
| | Required | Person 1 | Person 2 | Person 3 |
| Class 1 | 8 6 | 1 6 | 3 6 | 4 6 |
| Class 2 | 6 2 | 3 2 | 2 2 | 1 2 |
Each field contains 2 values The first value is the number of hours spent in the class, the second field is the number of hours required for certification.
The Required field id my grand total summary.
In the cross tab expert the fields are defined as follows.
Rows:
Command.descr -> a field containing the class names
Columns:
Command.fullname -> a field containing students full names
Summarized Fields:
Sum of Command.evlength -> summation of all time spent in a given course
Max of #required -> this formula returns the number of required hours based on the course name
I am trying to highlight the field Sum of Command.evlength if it is greater than or equal to the value of Max of #required.
My solution was to perform background formatting. Right-Click on the Sum of Command.evlength field, select Format Field. Click the borders tab, check Background, and enter a formula.
The formula I was using is:
if CurrentFieldValue >= {#required} then color(152, 251, 152) else crNoColor
This is not the correct formula. My crosstab has been placed in the footer, which causes {#required} to contain the last value in the grid which in the above example is 2.
From my research I thought I would have to use GridRowColumnValue(row or column name) to access the value of {#required} in the crosstab, but I could not come up with the correct string to represent it.
Does anyone have a way for me to correctly perform this comparison?
Frustratingly I don't think you can use the highlighting expert to compare to a dynamic value. You could swap the columns round then add the following formulas:
To the max_of_required background colour:
whileprintingrecords;
global numbervar required_hrs := currentfieldvalue;
crNoColor;
To the sum_of_command.evlength background colour:
whileprintingrecords;
global numbervar required_hrs;
if currentfieldvalue >= required_hrs then
crRed
else
crNoColor;
I think there are a few other ways but i'm not as confident with those so start here.