Tricky query

Question

I have a table
TAB1
with values
FLD1 FLD2
3838 LOC
3737 POI
7337 NSM
4646 LOC
3838 POI
In an sql statement, if I input 2 parameters 3838 and 4646 (FLD1 values), then
since LOC has both these variables, it should output
LOC
(and not POI since 4646 does not appear on it)

Answer 1

Will you always get two values, or might you get one or three or what have you? Here's solution for any number of input values.
DROP TABLE tab1;
CREATE TABLE tab1 (fld1 NUMBER, fld2 VARCHAR2(3));
insert into tab1 values(3838, 'LOC');
insert into tab1 values(3737, 'POI');
insert into tab1 values(7337, 'NSM');
insert into tab1 values(4646, 'LOC');
insert into tab1 values(3838, 'POI');
commit;
WITH p AS (
SELECT column_value AS fld1,
       COUNT(*) OVER (PARTITION BY NULL) AS param_cnt
  FROM TABLE(varchar2_array(3838, 4646))
m AS   (
SELECT t.*,
       p.param_cnt,
       COUNT(*) OVER (PARTITION BY t.fld2) AS matched_cnt
  FROM p,
       tab1  t
WHERE t.fld1 = p.fld1
SELECT fld1,
       fld2
  FROM m
WHERE m.matched_cnt = param_cnt;