IN to join

Convert the query to join below.

ID is PK.



create table a( id number,flag number);


insert into a values(1,100);
insert into a values(2,100);
insert into a values(3,100);
insert into a values(4,200);




create table b( id number,flag number);


insert into b values(1,100);
insert into b values(9,100);
insert into b values(3,600);










SELECT * FROM B WHERE FLAG IN ( SELECT FLAG FROM A);


op/



9
100


1
100

SQL > select distinct b.id, b.flag a, and b where b.flag = a.flag;

FLAG OF THE ID

---------- ----------

1 100

9 100

Tags: Database

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