Power BI DAX help

[JJha75]

Hi Community,
I am having difficulties in dax calculation. I hope you guys will help me, maybe it is very simple for some of you. Below is the scenario.
I have 3 tables, date table and two tables with project ID. there is relationship in date table and project B table, and table A has master list of projects that is related with Table B using project id.
I want to get list of missing projects name from table B when comparing to master project list of table A. Now, I want to get a list of projects id based on date filtered in date slicer of  date table where table B project doesn't appear in table A Project. I want to use DAX measure or column for this solution. 
Thanks for the help.
Jag

[amitchandak · Accepted solution]

@JJha75 , Use this measure along with Project from Table A in a visual

countrows(except(values(Table1[Project]), distinct(Table2[project]) ) )