Ask the lines that correspond fully to another column

Hi all

Take into consideration the following 11 g:

CREATE TABLE X_A (COL1 NUMBER, COL2 NUMBER);
create table x_b (col1 number);

INSERT INTO X_A VALUES (1,2);
insert into x_a values (1,3);
INSERT INTO X_A VALUES (2,2);
INSERT INTO X_B VALUES (2);
insert into x_b values (3);

I want to interview table X_A only these col1 that match all records in X_B (i.e. value equal to '1').

If I join the 2 tables by x_a.col2 - x_b.col1 I have two values 1 and 2 col1. But I want only 1 to appear because it contains 2.3 in x_b.col2

Any ideas?

Kind regards

Stoyanov

Join partition using

select col1, col2
  from (
        select a.col1, a.col2, count(a.col2) over(partition by a.col1) cnt1, count(b.col1) over(partition by a.col1) cnt2
          from x_b b
          left join x_a a partition by (a.col1)
            on a.col2 = b.col1
       )
 where cnt1 = cnt2

Tags: Database

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