Count row in two straight tables

[Black_Hole]

Hello all,

I would like to count the number of rows in two tables. The problem is that in these two tables, I have the same key fields (A,B,C).

Table 1: 4 fields

A             B             C             D

Table 2: 3 fields

A             B             C            

Consequently, I don't how can I use the function Count() and avoid a wrong result. 

My purpose is to create a pie chart  representing the number of rows in each table.

Please could you help me.

Thank you in advance for your help.

[dplr-rn]

not 100 % clear why you need 2 tables and what are you counting.
but going with your approach. create a Type field in each table. e.g. Table1 - Type='Table1', Table1 - Type='Table2'
use this type value in set analysis when doing your count
e.g. count({<Type='Table1'>}A)

[Black_Hole]

Hello @dplr-rn,

Thank you very much for your solution.

I would like to try it.

Please could you explain how you can create a type field.

Thank you in advance for your help.