Case Statement from One Table & Two tables

Hi I am new to DAX and trying to get the following measures to work. 

Table 1: ID , Column1, DateColumn2, Column 7

Table2: ID, DateColumn3, DateColumn4, DateColumn5, Column5,Column6

My Measures

Measure1:

COUNT( CASE WHEN
Table2.DateColumn3>= Table2.DateColumn4
AND Table2.Column5 = 'xyz' AND Column6 IS NULL
THEN Table2.ID END)

Measure2:

CASE WHEN Table1. DateColumn2 >= Table2.DateColumn3 AND (Table1. DateColumn2 <= Table2.DateColumn4 OR Table2.DateColumn3 IS NULL) THEN 1 ELSE 0 END

Measure3:

COUNT(CASE WHEN Table1. DateColumn2 >= Table2.DateColumn3 AND (Table1. DateColumn2 <= Table2.DateColumn5 OR Table2.DateColumn4 IS NULL) THEN Table1.ID END)