How can I indirectly reference a worksheet?

Question

I'd like to extract data automatically from spreadsheets that I obtain on a daily basis.
I'm pasting each spreadsheet into a new sheet with a summary sheet as sheet one so that I'll have one summary sheet for each month with thirty or so other daily sheets.
I've created a successful formula for doing this and now I want to be able to drag the formula across in the summary so that I don't need to alter it each day.
How do I do this?
Ideally, I'd like to extract the data from each daily spreadsheet without the need to copy and paste or even open it!
Is this possible with numbers?
Kind regards

Answer 1

As quinn suggests, if by daily "spreadsheet" you mean a separate document each day, then you will need a script. More details are needed on what your sheets look like before one can be suggested.
If you save the daily data in a separate sheet in the same document, then the INDIRECT function can help.  Here is a simple example of Table 1 in Sheet 1, which retrieves values from cell A2 in tables on Sheet 2 and Sheet 3.  For this example, I entered 2 in cell A2 of Table 1 on Sheet 2, and 3 in cell A2 of Table 1 on Sheet 3.  Once you've got the INDIRECT formula working, you can just copy it down the column, and specify in columns C and D the sheets and tables containing the source data.
Result
Formula Used in column A
Sheet reference
Table reference
2
=Sheet 2::Table 1::A2
Sheet 2
Table 1
2
=INDIRECT(C3&"::"&D3&"::A2")
Sheet 2
Table 1
3
=INDIRECT(C4&"::"&D4&"::A2")
Sheet 3
Table 1
SG