Convert a list of rownumbers to a list of cells and apply a formula to them in Google Sheets - google-sheets

I have a list of numbers in Column B corresponding to different rownumbers in Column A (for example, in B1, I have the list {1,2,3}).
I would like to turn this list into a list of cells ({A1,A2,A3}) and apply a formula to that list in Column C (for example, I would like to AND them together).
Column A always contains Boolean Values.
Column B will always contain valid rownumbers separated by a comma.
I would like a formula that I can put in Column C and drag down and extract the numbers from (for example using =SPLIT(B1,",")) and then apply a formula to.
Shown in the table below is a sample of what I would like to achieve. Note that Column C contains a manual entry approach that I would like to avoid.
| Column A | Column B | Column C | Column D (expected ouput)
| -------- | -------- | -------------- | -----------
Row 1 | TRUE | 1,2,3 | =AND(A1,A2,A3) | FALSE
Row 2 | FALSE | 2,4 | | FALSE
Row 3 | FALSE | 4,6,2,1 | | FALSE
Row 4 | FALSE | 2 | | FALSE
Row 5 | TRUE | 1,5 | | TRUE
Row 6 | FALSE | 1,5,3 | | FALSE
Some things I have tried include using
I have also tried moving around the order of the formulas in the above equation to no avail.
I have only managed to get my formula to be affected by the first rownumber in column B.

You were very close! With BYCOL (considering that the SPLIT result is a serie of cells in columns) you can get the INDEX of column A; and wrap it in AND:
If you want, you can wrap it in BYROW to apply to your whole range:


Reference range when column matches string

Budget spreadsheet. Column A contains categories, Row 1 contains paycheck dates, and each cell from B2:AE91 contains numeric values ("how much I spent on categoryX during paycheckY").
Named ranges:
Column A - "Budget_LineItem"
Row 1 - "Budget_PayPeriods"
On another tab, I have a list of specific categories called "Funds," where I want to track how much I've saved so far each paycheck toward the category by adding up the category's values each paycheck up until TODAY().
For example:
| | A | B | C | D |
| - | - | - | - | - |
| 1 | Fund | Balance | Today: | =TODAY() |
| 2 | Auto Insurance | =SUMIF(Budget_PayPeriods,"<="&MAX($D$1:$D$2),Budget!F48:AE48) | Projected Date: | |
As you can see, I just have a static range for the "Auto Insurance" category: Budget!B48:AE48. This works, but I want a formula that looks up the adjacent value in column A against the Budget_LineItem range, and returns the row range from B:AE in the Budget spreadsheet.
Basically reads: "Go find how much I've saved/spent so far toward categoryX in the Budget tab, and add up all the values for each paycheck up through today."
I know I'm close, but I can't make INDEX, MATCH, or any of the LOOKUP functions do what I need. I just can't figure it out.
EDIT: Here's a link to an example:
I also made a change to the OP formula in B2 as I realized it didn't work. I had tweaked it because my original formula had extra complexity and I was trying to KISS for this question. I changed it back to the more complex version so it works properly now.
delete range B2:B and use this in B2:
=INDEX(MMULT(FILTER(Budget!B2:4, Budget!B1:1<=MAX(D1:D2))*1,
{Budget!A2:A4, MMULT(FILTER(Budget!B2:4, Budget!B1:1<=MAX(D1:D2))*1,
SEQUENCE(SUMPRODUCT((Budget!B1:1<=MAX(D1:D2))))^0)}, 2, 0)))

Count unique cells and display them in column

I am building a list of gigs I attended and I want to count how many times I've seen each band.
I know about UNIQUE, but because I keep each band in separate column it just copies each row.
Given the table (or screenshot of real data):
| Date | Venue | Bands |
| 02.02.17 | Venue1 | Band A | Band B | Band C | Band D | Band E |
| 02.07.17 | Venue3 | Band D | Band C | | | |
The output I want:
| Band | Attended |
| | (times) |
| Band A | 1 |
| Band B | 1 |
| Band C | 2 |
| Band D | 2 |
| Band E | 1 |
I can change structure if needed.
What happens after using UNIQUE:
Thanks in advance.
Step 1. Get list of all unique bands in one column, one per row
Step 2. Place this formula in next column, and drag it down
Transform your data to a simple table format in order to make easier to do data-analysis.
A simple table use the first row for column headers a.k.a. fields and has one and only one column for each entity, let say only one column for band names.
The above could be done in a single but complex formula hard to debug, so it's better to start by doing this using simple formulas and once you are certain that all is working fine, think about making a complex formula or writing and script.
Unpivot Matrix to Tabular. Using counts of two variables into individual rows
Generate a list of all unique values of a multi-column range and give the values a rating according to how many times they appear in the last X cols
Normalize (reformat) cross-tab data for Tableau without using Excel
How do you create a "reverse pivot" in Google Sheets?

Get multiple values, selected according to another column, into a single cell

I am trying to find a way to get multiple values from an array to display in one cell
For example I have the two columns as below
| a | 1 |
| b | 2 |
| c | 1 |
| d | 3 |
| e | 2 |
So if the parameter is 2 the cell would display "be"
I want all the values form the first column where the second column is 1.
I have tried to do this with dget but that only returns a single value. Is there a way to do this with formulas or does it require a Javascript solution?
You can do it by using filter to return only the letters next to "2", and then join to join them in one cell.
=join("", filter(A1:A, B1:B = 2))

Structuring a query between multiple tabs to join values by name

I'm trying to write a SQL query in Google Sheets to try and get data for "matching" results from two different tabs, but running into some trouble.
This is a sheet that's basically an automated scoring engine for instructors who take a two-part test (written and practical). After the results are entered, I'd like to use some SQL to take the results from the two tabs and collate them into a final score.
Link to the sheet in question.
There's a "Practical Scores" tab (which takes all the data from the associated Google Form), and a "Written Scores" tab. I'd like to get the name of the instructors who match in both those tabs, and give the associated score for them, but I'm mostly having trouble with writing the correct SQL.
Most of what I'm trying to do is working fine. I'm able to pull the final practical scores via the following SQL:
=query(PracticalScores!A2:E, "select A, count(E),SUM(E)/3 group by A")
I can also pull the written scores as follows:
=query('Written Scores'!B2:C,"select B,C")
But I want the intersection of the two as well, and that's where I'm running into problems.
=query(A8:E, "select A,C,D where A = E")
will simply return the rows where the names match up, and I want the instances where the names match up, regardless of whether the rows do.
That is, I want all the rows where the names match from tab 1 to tab 2 and not just the few rows that happen to line up perfectly.
If I'm not explaining this well, please let me know and I can provide additional information. Any assistance would be very greatly appreciated!
Since the query function does not support joins, this can't all be done in one query. Instead, the following device can be used:
=arrayformula(vlookup(name column, table, # of column to extract, False))
For example, suppose I have a table
| | A | B |
| 2 | Jim | 3 |
| 3 | Sarah | 4 |
| 4 | Bob | 5 |
to which I want to add another column, taking it from
| | E | F |
| 2 | Sarah | 9 |
| 3 | Bob | 8 |
| 4 | Jim | 7 |
The basic idea is to put in cell C2 the formula
=arrayformula(vlookup(A2:A, E2:F, 2, false))
which will look up every name from first table (column A) in the column E, and return the matching value in column F. Result:
| | A | B | C |
| 2 | Jim | 3 | 7 |
| 3 | Sarah | 4 | 9 |
| 4 | Bob | 5 | 8 |
In practice, one should filter out empty lookup values to improve performance:
=arrayformula(vlookup(filter(A2:A, len(A2:A)), E2:F, 2, false))
If the second table contains some names not present in the first, they will not be returned by the above formula. In this case it is better to prepare a full list of names, for example with
=sort(unique({Sheet1!A2:A; Sheet2!A2:A}))
which collects the names from A columns of two sheets, eliminating duplicates and sorting. Then look up those using vlookup as above.

Google Sheets - plot two sheets as line chart

I have two sheets in a google sheets document. They look something like this:
| Date | Value |
| 2015-01-01 | 100 |
| 2015-02-04 | 200 |
| Date | Value |
| 2015-01-01 | 100 |
| 2015-05-04 | 150 |
The dates and values are NOT regular. I'd like to plot both tables into a single line graph with date along the x axis, and two lines representing the values in each of the tables respectively. I don't want to have to merge the two tables, unless I can merge them automatically with a pivot table or something.
When I insert a chart, I have to choose the column which represents the x axis. In my case, I need the date column from both tables, so effectively two columns to represent my x axis.
A use case for this is simply showing the bank balances for two separate accounts in a line graph.
You can create another table on a new sheet that will merge the data columns from each of these tables, and then have two VlookUp columns, one for each table, and create a graph based on these three columns.
two merge Data columns from two different sheets use this
Your second column will will have the following VlookUp formula
Third Column
Then just make a graph based on this table that should look something like this
| Date | Value |Value |
| 2015-01-01 | 100 | |
| 2015-02-04 | 200 | |
| 2015-01-01 | | 100 |
| 2015-05-04 | | 150 |