I've an Access database that follows each Line Item across multiple stages where tasks are assigned to individuals. Each stage has a Comments field and are recorded in a Table which looks like:
Line Item Stage Title Comments
1 1 Introduction Trial comment
1 1 Introduction Another one
1 2 Abstract Following one
1 2 Abstract Andi nexto
1 3 Thesis Nexto
2 1 Introduction Comment for next item
2 1 Introduction Andi another one
...
I want to be able to concatenate these comments for each stage and each Line Item as:
Line Item Stage Title Comments
1 1 Introduction Trial comment, Another one
1 2 Abstract Nexto one, Andi next
1 3 Thesis Nexto
2 1 Introduction Comment for nexto item, Andi another one
I tried using Allen Brown's ConcatRelated() function with multiple WHERE criteria:
ConcatRelated("[Comments]","[CommentsT]","[LineItemNo]=" & "[txtLineItemNo] AND "[StageNo]=" & [txtStageNo])
but with no luck. Using a single WHERE clause does concatenate all the comments in the required field without considering StageNo and Title.
Kindly advise as to what is the best way for me to achieve this.
Thank you.
Related
I have a verbal algorithm question, thus I have no code yet. The question is this: How can I possibly create an algorithm such that I have 2 dynamic stacks, both can or can not have duplicate items of strings, for example I have 3 breads, 4 lemons and 2 pens in the first stack, say s1, and I have 5 breads, 3 lemons and 5 pens in the second stack, say s2. I want to find the number of duplicates in each stack, and print out the minimum number of duplicates in both lists, for example:
bread --> 3
lemon --> 3
pen --> 2
How can I traverse 2 stacks and print the number of duplicated occurrences until the end of stacks? If you are confused about anything, I can edit my question depending on your confusion. Thanks.
I'm trying to make search a bit more friendly and wanted to exploit the Levenshtein distance. This works great but if a value in a column has a length of 25 characters long, the distance to only 3 characters is too far. In this case, it performs worse than the LIKE method. I solved this by splitting all words into their own rows using regexp_split_to_table. This is nice, but it's still not working if I have multiple words as input.
For example:
Let the data look as following
id
col1
col2
1
one two
three
2
two
one
3
horse
tree
4
house
three
using regexp_split_to_table would transform this to
id
col
1
one
1
two
1
three
2
one
2
two
2
two
3
horse
3
tree
4
house
4
three
If I search for one tree, I'd like to compare one with each word but also compare tree with each word and then order by the sum of both distances.
I have no idea where to start. I also do not know if this is the best approach to do this (it seems somewhat excessive but I'm also not an expert). Maybe I'm also overthinking this. I'd appreciate a hint into the right direction :).
I need to compare the last row of a group to the row above it, see if changes occur in a few columns, and populate a new column with 1 if a change occurs. The data presentation below will explain better.
Also need to account for having a group with only 1 row.
what we have:
Group Name Sport DogName Eligibility
1 Tom BBALL Toto Yes
1 Tom BBall Toto Yes
1 Tom golf spot Yes
2 Nancy vllyball Jimmy yes
2 Nancy vllyball rover no
what we want:
Group Name Sport DogName Eligibility N_change S_change D_Change E_change
1 Tom BBALL Toto Yes 0 0 0 0
1 Tom BBall Toto Yes 0 0 0 0
1 Tom golf spot Yes 0 1 1 0
2 Nancy vllyball Jimmy yes 0 0 0 0
2 Nancy vllyball rover no 0 0 1 1
Only care about changes from row to row within group. Thank you for any help in advance.
The rows are already ordered so we only need to last two of the group. If it is easier to compare sequential rows in a group then that is just as good for my purposes.
I did know this would be arrays and I struggle with these because never use them for my typical sas modeling. Wanted to keep things short and sweet.
Use the data step and lag statements. Ensure your data is sorted by group first, and that the rows within groups are sorted in the correct order. Using arrays will make your code much smaller.
The logic below will compare each row with the previous row. A flag of 1 will be set only if:
It's not the first row of the group
The current value differs from the previous value.
The syntax var = (test logic); is a shortcut to automatically generate dummy flags.
data want;
set have;
by group;
array var[*] name sport dogname eligibility;
array lagvar[*] $ lag_name lag_sport lag_dogname lag_eligibility;
array changeflag[*] N_change S_change D_change E_change;
do i = 1 to dim(var);
lagvar[i] = lag(var[i]);
changeflag[i] = (var[i] NE lagvar[i] AND NOT first.group);
end;
drop lag: i;
run;
It is not uncommon for procedural programmers to find this kind of dilemma in SQL, which is predominately a set language where rows have no position. If you write a procedure that reads the select data (sorted in the desired order), it can have variables to control creating the desired additional columns in the output, similar to the lag function above.
Or you can put it into a spreadsheet, which is happier detecting the changes in formula filled columns =if(a2<>a1,1,0). Just make sure nobody re-sorts the spreadsheet data into a new order!
I am trying to design a query in Microsoft-access which should present the data in the following manner:
Car Make Black White Red
Total 2-door 4-door Total 2-door 4-door Total 2-door 4-door
---------------------------------------------------------------------------------------------------
Honda 4 2 2 3 1 2 4 3 1
Toyota 3 1 2 5 3 2 6 1 5
Ford 2 0 2 0 0 0 1 0 1
In Ms-Access query designer, I cant add more than one field which has a different criteria (for.eg white vs black). If I try to, it gives me nothing in the datasheet view (as if it tried to find a common car which is both white and black). Please tell me a sql query that I can use instead.
EDIT 1
Car Table:
-CarMake "Short text"
-Color "Short text"
-Door "Short text" (2-door or 4-door)
EDIT 2
This is what I was talking about. How to add more fields in here with different criteria for.eg white:
Two suggestions -
First, you could concatenate color & style into one variable and use that in the crosstab query - but you won't get the subtotals for colors.
Second, you could use iif statements in each column to define exactly what you want. Column 1 would be sum(iif(color="black",value,0)). Column 2 would be sum(iif(color="black" and model="2-door",value,0)). And so on. Not as simple as the 1st option, but you'll get exactly the columns you need.
SELECT Car.CarMake, Sum(IIf([color]="black",1,0)) AS BlackTotal, Sum(IIf([color]="black" And [door]="2-door",1,0)) AS Black_2D
FROM Car
GROUP BY Car.CarMake;
Full disclosure, this is for an assignment I don't think I'm looking for spoon feeding, more so just a general question. Am a I allowed to break that into a group of 8 and 2 groups of 4, or do all group sizes have to be equal, ie 4 groups of 4
1 0 1 1
0 0 0 0
1 1 1 1
1 1 1 1
Sorry if this is obvious, but my searches haven't been explicit and my teacher was quite vague. Thanks!
TL;DR: Groups don't have to be equal in size.
Let see what happens if, in your case, you take 11 groups of one. Then you will have an equation of eleven terms. (ie. case_1 or case_2 or... case_11).
By making big group, in your case 1 group of 8 and 2 groups of 4, you will have a very short and simplified equation like: case_group_8 or case_group_4_1 or case_group_4_2.
Both grouping are correct (we took all the one in the map) but the second is the most optimized. (i.e. you cannot simplified more)
Making 4 groups of 4 will bring you an equation that can be simplified more.
The best way now is for you to try both grouping (all 4 vs 8/4/4) and see the output result.