SQL & PL/SQL :: Pick Up The Data From Table 1

I have a reqmt that is little complex.

Example: (Real Data)

Table1 (Column Name)
Height
Width
Color

Table2
ID,Height, Width, Color, Remarks
1,2,3,NULL,NULL
2,NULL,NULL,2,NULL
3,1,2,3,4

What I require is pick up the data from table1 and for each row in table1, check the corresponding column to see if null. If null create a counter and add 1 to it.

I would only check for 1 record at a time in table2 (ID is input parameter in pl/sql) In other words, if my ID is 1, my count should be 1 (since COLOr is null in table2 for id=1 and color is a row in table1) if my id is 2, count is 2 (ht and width are NULL and are both separate rows in table1) if id is 3, count=0 since all fields have data even though some of these columsn exists as rows in table1.