Use ROWS
=ROWS(A1:A20) will return 20. Add details if you need more help or if this is not what you are trying to do
Rows are identified by numbers in Excel.
Yes. Rows are identified with numbers. Columns are identified with letters.
You can have a table without rows. It would be an empty table with no data. select (*)count from TABLENAME; 0 rows returned.
Rows are a horizontal arrangement of cells. All rows are numbered. The amount of rows depend on the version of Excel you have. Versions of Excel from 2007 have 1,048,576 rows. Before that, there was 65,536 rows.
There are 256 Columns and 65536 Rows in Excel 2003.
In Excel 97 there were 256 columns and 65536 rows.
Excel 2007 has 1,048,576 rows, so it has more than 65,536 rows. Excel 2003 had 65,536 rows and it was not possible to increase that.
A graph/table, or Microsoft Excel, or Apple Numbers.
No. They run left to right and are labelled with numbers.
There are 1,048,576 rows and 16,384 columns in Excel 2010
If the version of Excel you are using only has 65536 rows, which was the case up to Excel 2003, then you can't add any more rows. From Excel 2007 onwards there are 1048576 rows, so that is what you would need to use.
There is no function to collapse rows in Excel, but you can hide rows you do not want to display. Highlight the rows you would like to hide and select Format | Hide and Unhide | Hide Rows.