Comparison of multiple column values with a single column value

Question

I have two separate tables say Tab1 and Tab2
I want to select some datas , which is common to both the tables.
In tab1 , there is a column 'STATE' and it's value is 'A'
In tab2, there are multiple columns for the state, say STATE_A,STATE_B, STATE_C ETC and a row is present with the following details
STATE_A = 1, STATE_B =1 ,STATE_C =0,STATE_D=1
I need to select STATE when STATE_A ='1',
if my STATE='B', this STATE has to be selected since STATE_B =' 1', similraly
if my STATE='D', this STATE has to be selected since STATE_D =' 1',
If my STATE='C', STATE_C should not get selected since it's '0'.
Is it possible to do this in a single SELECT statement, where I have some other checks also or else how can I achieve it?

Answer 1

Maybe this will help
Select * from STATE_MAS ;
STATE
A
B
D
F
H
Select * from STATE_CHILD
  STATE_A   STATE_B   STATE_C   STATE_D   STATE_E   STATE_F   STATE_G   STATE_H   STATE_I   STATE_J
        1         0         0         1         1         0         0         0         0         0
CREATE OR REPLACE FUNCTION GET_STATE (P_VAL VARCHAR) RETURN NUMBER IS
V_SQL VARCHAR2(200);
V_COL VARCHAR2(35);
P_RETURN NUMBER ;
BEGIN
V_COL := 'STATE_'||P_VAL;
V_SQL := 'SELECT 1 FROM STATE_CHILD WHERE '||V_COL||' = 1 ';
EXECUTE IMMEDIATE  V_SQL INTO P_RETURN ;
RETURN P_RETURN ;
END;
SELECT STATE FROM STATE_MAS
WHERE GET_STATE(STATE) = 1 ;
STATE
A
D