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    <p>I know it's not seen here as good practice, but I want to do something similar. And it does replicate database functionality to an extent but I don't have the time or support to build one from scratch when there's something already half in place.</p> <p>The reason I want to be able to do this is to create a summary table that links to all the worksheets in the workbook, and automatically extends if you insert a new worksheet. This is to manage a large sales / reporting spreadsheet with lots of different business units that all have the same structure (ie use the same worksheet format to report the same outcomes for different people. There is a high turnover. I want to have several summary sheets reporting different aspects of the source sheets. This is very time consuming to manage if recreating all of the tables each time.</p> <p>You <em>should</em> be able to use the row() as an index marker to define the information that you want using something like REPLACE, OFFSET or INDEX but you can't as they only refer to 2D arrays. </p> <p>Whereas Excel treats 3-D references as arrays for statistical functions it does not seem to do the same for reference functions. You might have SUM(sheetX:sheetY!A1) and be able to add a sheet in between, there is not (eg) a INDEX(sheetX:sheetY!A1,n) function. I've tried experimenting using these 2D functions as part of array formulas, and defining the 3D reference as an array or a named range... well it was worth a go :).</p> <p>So I believe it's a valid action. I also believe there must be a way to do it, but for now I'm falling back on a UDF that has the risk of errors caused by calculation issues, or manipulating a Workbook_SheetChange function or similar. Or creating a single master sheet to control all the others which is populated by using a subroutine based on an array of all workbooks.</p>
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