How to transpose some rows to columns? - google-sheets

Question

There were a lot of questions with transpose but I have some specifics and can't create the right formula.
So I have near 100k rows in the following format
https://docs.google.com/spreadsheets/d/146-6YHv69DDOnPKheKeRFZIQeZYIgO6UwCMd7X9VeKU/edit?usp=sharing
I need ARRAYFORMULA or something like that to make this 100k rows in the format that you can see on the "Expected Outcome" tab.

Answer 1

=ARRAYFORMULA({UNIQUE(INDIRECT("source!A2:A"&COUNTA(source!A2:A))),
QUERY(SPLIT(TRANSPOSE(SPLIT(QUERY("♦"&INDEX(SPLIT(TRANSPOSE(SPLIT(
TRIM(QUERY(TRANSPOSE(QUERY(TRANSPOSE(
IF(source!B2:J<>"", "♦"&source!A2:A&"♠"&{"♥"&source!B2:B, source!C2:J}, ))
,,999^99)),,999^99)), "♦")), "♠"),,2),,999^99), "♥")), "♦"),
"where Col2 is not null", 0)})

Answer 2

You have a vast number of records but there are 19 data fields to each record spread over 10 columns & 12 rows. You suggested an arrayformula (and much more clever people than I can probably do that), but I suggest a script which takes the data in its current form on one sheet (say the 'source'), and which outputs the data to a new sheet (say, the 'target').
There are a couple of issues to be addressed in "mapping" the data:
how many records are represented on the input sheet - required to enable looping. I used the Javascript Math.floor method to calculate the number of products.
identify the correct row/column combination for each field. The data is in three segments
8 fields in contiguous columns in the first row,
2 fields in 2 rows in the ninth column, and
9 fields in nine contiguous rows in the tenth column.
Total = 12 rows/10 columns. To do this, in order to navigate the rows, I took the counter (i) multiplied by the number of rows, plus 1; the columns are more intuitive.
for efficiency,
get data once only at the beginning of the script;
use arrays to progressively build the output; and
update the output (setValues) once at the end of the script.
function myFunction() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sourcesheetname = "source";
var targetsheetname = "target";
var source = ss.getSheetByName(sourcesheetname);
var target = ss.getSheetByName(targetsheetname);
var sourcerange = source.getDataRange();
var sourcedata = sourcerange.getValues();
var sourceheaders = 1;
var rowsperproduct = 12;
var sourcelr = source.getLastRow();
var integerPart = Math.floor((sourcelr-sourceheaders)/rowsperproduct);
//Logger.log("DEBUG: number of products = "+integerPart);
var rowdata = [];
// look thought the number of products
for (var i = 0; i<integerPart; i++){
// use a temporary array to build the data for the row.
var temp = [];
// row 1, copy first eight columns (0-7)
temp.push(sourcedata[(i*12)+1][0]);//ID
temp.push(sourcedata[(i*12)+1][1]);//GID
temp.push(sourcedata[(i*12)+1][2]);//NAME
temp.push(sourcedata[(i*12)+1][3]);//PRICE
temp.push(sourcedata[(i*12)+1][4]);//BRAND
temp.push(sourcedata[(i*12)+1][5]);//URL
temp.push(sourcedata[(i*12)+1][6]);//country
temp.push(sourcedata[(i*12)+1][7]);//instock
// row 2 & 3 in Column I(8)
temp.push(sourcedata[(i*12)+2][8]);//url1
temp.push(sourcedata[(i*12)+3][8]);//url2
// rows 4 - 12 in Column J(9)
temp.push(sourcedata[(i*12)+4][9]);// tech name
temp.push(sourcedata[(i*12)+5][9]);// size
temp.push(sourcedata[(i*12)+6][9]);// inches
temp.push(sourcedata[(i*12)+7][9]);// mm
temp.push(sourcedata[(i*12)+8][9]);// depth
temp.push(sourcedata[(i*12)+9][9]);// BB
temp.push(sourcedata[(i*12)+10][9]);// ref1
temp.push(sourcedata[(i*12)+11][9]);// ref2
temp.push(sourcedata[(i*12)+12][9]);// ref3
// Update the rowdata for this row
rowdata.push(temp);
}
// update data to target
target.getRange(2,1,integerPart,19).setValues(rowdata);
}