I am new to DynamoDB so I'm still trying to understand how to use it, but I have what I believe is a simple task but I'm not sure how to address it.
I need to create a table to store categorized questions in which I need to store a click counter. So let's say something like this:
ID: 1
Question: What is this?
Category: General
Clicks: 100
Now, the problem is I need an optimized way to get the most general clicked questions and the most clicked questions by category, let's say a top 10.
In a classic SQL style it would be something like this:
SELECT ID, Question
FROM Questions
ORDER BY Clicks DESC
LIMIT 10
Can anyone point me in the right direction on how to structure the table? I tried the sorting but it always requires a hash key condition, so I don't understand how I can get this done as I need the top 10 results and not a single one.
Thanks in advance!
How are you accumulating the clicks, if you are able to figure out how you accumulate the clicksstream onto the table correctly that will be your answer.
You will need to implement a mechanism that maps incoming clicks to the item record being clicked on and increment it using an atomic counter. With this you will be able to then create a sparse index and sort it in descending order to get what you need.
I am writing a query function that I would like sorted. I have this figured out. What I cannot solve is attempting to insert 2 blank rows between the sorted results. Is this at all possible? Here is my query as it currently stands. Works perfectly as written. Just would like to have a 2 row gap between results.
Thank you.
=query('Form Responses 1'!A:CM,"Select B,C,D,I,L,AU,AX Where K = '"&Titles!B2&"' OR AW = '"&Titles!B2&"'Order by K,AW",0)
enter image description here
Since you've clarified your question to say that you want two blank rows, only to be added at a specific point in your query results, I've created another answer. But you haven't answered my question about what criteria you have for deciding where to insert these two lines, so I've made an assumption based on your data. This formula should be easily adapted if you have some other criteria for where to insert the blank lines. See my added tab HelpGK in yur sample sheet.
Try this formula, where you have your query:
={query('Data Sheet'!A:J,"Select B,C,D,E,F,H,I Where E='' and (G = 'ABC' OR J = 'ABC') Order by J,G",0);
{"","","","","","",""};
{"","","","","","",""};
query('Data Sheet'!A:J,"Select B,C,D,E,F,H,I Where E<>'' and (G = 'ABC' OR J = 'ABC') Order by J,G",0)}
Note that I don't believe your exact Desired Result can be obtained from your Data sheet. You are missing data rows. But this formula produces the result in the screenshot you provided.
EDIT:
Just realised that I created an answer for a single column of data.
Please share a sample sheet since this is not your case.
You can try this formula, but you'll need to replace this text "A4:A8" with your exact query:
=ArrayFormula(flatten(split(A4:A8 & "♥ ♥ ","♥",0,0)))
Note that the column with the "~" values in the blank cells is just to demonstrate what is happening.
If you had provided a sample sheet, with sample data, it would have been easier.
Let me know if this works for you. If not, please provide a sample sheet, with sample data, and let us know what else you need.
Be aware that the you can't put any values into the two inserted rows of blank cells, or the arrayformula will fail. But if you are planning to save the results of this as values, then pasted into place, then you could overwrite the blank cells, if desired.
Also be aware that FLATTEN is an undocumented function, and may possibly be removed from Sheets. If this is for a critical application, and alternative formula can be provided. Let us know if that is a concern.
I will delete my earlier answer, which mistakenly focused on a one column result.
This messy formula seems to handle multiple columns. If it works for you, I'll see if I can simplify it or clean it up. I can also provide details of the steps it is doing, if necessary. Replace the text "A4:C8" in this formula with the range where your query result currently exists. Once you've tested that, you can replace the text "A4:C8" with your actual query statement, to have everything done in one formula, if you want.
=ARRAYFORMULA(SUBSTITUTE(SUBSTITUTE(SPLIT(FLATTEN(ARRAYFORMULA(SPLIT(TRANSPOSE(ARRAYFORMULA(QUERY(TRANSPOSE(ARRAYFORMULA(SUBSTITUTE(A4:C8," ","♥"))),,99^99)&"♦~♦~")),"♦",1,0)))," ",1,0),"~",""),"♥"," "))
Please let me know if this works for you. If you have any issues, please share a sample sheet, with only sample data, and clarify what isn't working as you expect.
EVE Online Manufacturing Spreadsheet
In Batch!F3:G, I'm attempting to break down the data input from columns B3:C to their components (and eventually materials/minerals in I3:J) by using filter to compare results in Engine!P:R. Multiplied of course by the total number of each finished product I need.
I've been trying to figure out ways to arrayformula this together, and even tried quite a few query functions without success. The best I've been able to come up with is to string the actual formula together, appending them with {}, but this gets bloated quickly. I need this to be open ended because I have a tendency to build a lot of things at once. Any help would be appreciated, even just point me in the right direction!
Well, based on my limited knowledge about google sheet, I can only think of one way to do this automatically.
Here's a sheet I constructed based on your sheet.
https://docs.google.com/spreadsheets/d/1AfX8o05gUGPiN5S90w4o0yxuIYjsJRaXsaYUFTJuEPo/edit?usp=sharing
First, on Engine sheet, add one more column which will give you the number of materials required for that part, which is looked up in the PART LIST of BATCH sheet. For this I use VLOOKUP, as you see in D2.
Then on BATCH sheet, query the materials that VLOOKUP return positive, multiply it by the amount of item and then sum them.
This is done by the QUERY used in F3
This method only if you don't have duplicate item in your PART LIST, due to the way VLOOKUP work.
Of course if you want to break the material list further, you can do the same approach..
In gspread, is it possible to get the last row or cell number that is filled?
The API reference page doesn't seem to help.
Gspread has "row_count", but I am not sure it returns all rows in a spreadsheet, or just the filled ones. If that doesn't help, there is a slightly less direct, but completely functional way to do it:
1.) let's assume your data is in column A, and it has been filled in consecutively row by row (i.e. no skipped rows)
2.) in another free cell in your spreadsheet--let's assume cell B1--use the native Google Sheets function COUNTA, which will count the number of values in a dataset, and specify column A as the target, i.e. "=COUNTA(A:A)"
3.) now just request the value of cell B1 with gspread's acell, i.e. "last_row_updated = myWorksheet.acell("B1").value"
You can use the following code, taken from this answer to this similar question:
def last_filled_row(worksheet):
str_list = list(filter(None, worksheet.col_values(1)))
return len(str_list)
Right now, I am using a filtering scheme which only looks at the data of the 5 or 6 most common entries in the 'Clinic' field. But, there are a handful of other possibilities which might account for a few rows each. They are too inconsequential to include on their own (I am using pie charts and bar charts), but I would like these rows to be accounted for. For this reason, I would like to create an "Other" category which groups these entries together. What is the best way of doing this? I know I can create a calculated column that groups everything aside from the top 5 or 6 in an other category, but I thought there might be a way to keep working with the original column and achieve the same result.
Unfortunately not. In 6.5.x you will have to write a case statement that will specify everything that is not most common to other.
In 7.0.x you can go to insert binned column. Add the bottom you can use values to create a bin. Add the values you want to the bin and call them "Other". Of course if you look at the column created like this, it is a case statement. But it is a whole lot faster than writing it yourself.
Following phiver I came out with this solution in Spotfire 6.5.2:
Add a calculated column
With something like this:
If(DenseRank(Count([Formation]) OVER ([Formation]),"desc")<10, DenseRank(Count([Formation]) OVER ([Formation]),"desc") & " " & [Formation], "10 Other")
Hope that helps.