Wish KPI of unique number of client_ID/city/product from 2 tables

[Li1i6n]

I have 2 tables from Snowflake

table_A with inc_ID, cl_ID, city, product plus 10 other columns
table_B with inc_ID, cl_ID, city, product plus 25 other columns
Wish KPI of unique number of client_ID/city/product from 2 tables
my dax: INC_cl = DISTINCTCOUNT(TABLE_A[cl_ID]) + DISTINCTCOUNT(TABLE_B[cl_ID])
expecting: number of unique cl_ID of table A en B together
result: some numbers are double

which dax do I have to use?

[Li1i6n]

Thanks amitchandak, I was thinking too to do that...
Table_A is ending and will not filled anymore (it has data of period Jan 2022 till Jun 2022), Table_B is the follow-up of Table_A with more colums (it has data from period Jul 2022). That's why I hoped to solve it with DAX in stead of create a new combination table.
Do you have suggestions with this added information?

[amitchandak]

@Li1i6n , I think you should create some common tables and analyze measures with those

https://amitchandak.medium.com/power-bi-when-i-asked-you-to-create-common-tables-a-quick-dax-solutio...