How to query multiple sheets and merge the data?

Question

I have 15 sheets that use the same template, for 15 different users. I would like to make a query on all the sheets, and display the result in a separate sheet:

=QUERY(Mona!A3:U300; "select A, D where C != ''")

Where Mona is the name of 1 of the 15 sheets.

So what I need is to make this QUERY on all the sheets and show the result. The columns (A,D) should only occur once.

How can I accomplish this?

Answer 1

This doesn't solve the merge part of your problem, but an efficient way of querying all the sheets is:

=QUERY(Indirect(A1); "select A, D where C != ''")

where cell A1 has the text value Mona!A3:U300

With this method you can list the different sheet names in cells and have a lookup for each one.

It might be possible to use an ArrayFormula to combine the queries into one formula, though I'm not sure how well query would work for this - using either Sumproduct or Filter to look up values using multiple criteria might work better.

Answer 2

Let me else suggest using {} to collect all data:

Sample formula for 3 sheets:

=QUERY({'1'!A1:D13;'2'!A2:D13;'3'!A2:D13},"select Col1, Col2")

Here we use header only once in worksheet #1: range '1'!A1:D13 contains header, range '2'!A2:D13 and others don't. Also we replace A, B, C notation with Col1, Col2, Col3...

Look at example workbook, may be someone'll find it hefpful.