Referring to Cells in Formulas problem.

Question

I have 2 Tables (and one chart) on one sheet. Table 1 has 3 columns viz. Dates, Electricity & Gas
The Dates column looks like this
01/01/11 - 31/01/11
01/02/11 - 28/02/11
01/03/11 - 31/03/11
01/04/11 - 30/04/11
etc etc
Table 2 calculates the number of gas units and kWh of electricity used during the date intervals in Table 1. What I've (unsuccessfully) tried to do is when Table 2 calculates the number of gas units and kWh of electricity these are automatically entered in the appropriate cell next to the relevant date interval in Table 1.
For example in Table 2 the number of Gas units is calculated in cell D11 and the kWh of electricity in cell I11 for a particular date interval corresponding to that in Table 1. The data in Table 2 are manually entered for each date interval given in Table 1. What I would like to do is get Numbers to automatically enter the value that is calculated in cells D11 & I11 in Table 2 into the appropriate cells in Table 1 e.g. for 01/01/11 - 31/01/11 the cells in Table 1 would be C4 & D4 for 01/02/11 - 28/02/11 the cells in Table 1 would be C5 & D5 and for 01/03/11 - 31/03/11 the cells in Table 1 would be C6 & D6 and so on up to 01/12/11 - 31/12/11 whose cells would be C15 & D15.
I've tried doing what is suggested in the *'Referring to Cells in Formulas*' help page but I must be doing something wrong as it just isn't working for my Sheet and Tables. If anyone can hopefully understand my problem and point to a solution I'd be very grateful.
If anyone wants a copy of the sheet to play around with they are more than welcome to have it it's just that I don't know how to make it available on this forum or show the tables as they are set out here on the forum.
Thanks
Thanks

Answer 1

As Yvan said, it can't be done the way you want. I personally like to have the backup data behind calculations whenever possible, versus overwriting the older data. I would use separate tables instead of a single Table 2.
I can't quite figure out your "dates". Is it one column or two? For example, is "01/01/11 - 31/01/11" in a single cell? I'm going to assume that's how it is and that it is column A.
Here is how I might do it:
1) I would move Table 2 to a different sheet (Sheet 2) and give it a name _exactly the same as the first period in column A_. In other words, it would be named "01/01/11 - 31/01/11" (without the quotes). This table will be for this period only. I would also go to the inspector and click "name" so the table name is shown above the table.
2) In Sheet 1, Table 1 (your Table 1) I would use the following formula in what you said was column C and a similar one for column D
=IFERROR(INDIRECT("Sheet 2::'"&A&"'::I11"),"")
Note that '"&A&"' has triple-quotes around it. The first one is an apostrophe followed by a quote. The second is a quote followed by an apostrophe. The apostrophes are required due to some of the characters being used in the table names. Normally you wouldn't need them.
3) For the next month, duplicate Table '1/01/11 - 31/01/11' by right clicking on it in the sidebar and choosing "duplicate". Reposition the duplicate on your sheet, rename it with another set of dates (make sure it matches exactly; copy/paste can be your friend), and enter the data for that period. Table 1 will find it automatically.