How to merge rows by the value of the cells in the column A

Hello!
I have a problem. I have Excel sheet with almost 100k rows. My task is to merge rows with same ID (In cells in column A). I have information in B, C, D, E and F cells. My goal would be a sheet where the data of these rows with a same value in cell A are on same row conjucated in their own cells. I'm newbie to Excel and I'm not even sure if this is possible.

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Thanks.

I don't see where you have mocked up your expected results for this sample data - please do this manually to show what we are aiming for.

No need - because I have now started interacting with you.

Please provide the updated sample workbook requested above.

No need to be ashamed!!!

I'll have another look now.

OK - may I ask what the purpose of having the data in the new layout is? Because it is NOT practical data layout. What you have already is MUCH better for subsequent data analysis, and the problem with side-by-side layouts is that you end up doing a lot of scrolling.

Before we assist, take a moment to consider whether this is actually a good idea - I think not, personally.

OK - here's how:

=IFNA(HSTACK(UNIQUE(A2:A17),DROP(REDUCE(0,UNIQUE(A2:A17),LAMBDA(x,r,VSTACK(x,TOROW(FILTER(B2:F17,A2:A17=r),,0)))),1)),"")

The customer isn't always right and, sometimes, needs educating.

Here's a version that will deal with more rows:

=LET(u,TOCOL(UNIQUE(A2:A1000),1),IFNA(HSTACK(u,DROP(REDUCE(0,u,LAMBDA(x,r,VSTACK(x,TOROW(FILTER(B2:F1000,A2:A1000=r),,0)))),1)),""))

Adjust the ranges in RED to suit your real data.

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You're welcome.

Let me know if you need it explaining at all.