Sql query to bring single record from right side of a table

Question

hi
I have two tables as below:
create table testsh1 ( idd varchar2(10), name varchar2(20));
create table testsh2 ( idd varchar2(10), balance float );
insert into testsh1 values('1','abc');
insert into testsh1 values('2','def');
insert into testsh1 values('3','ghi');
insert into testsh1 values('4','jkl');
insert into testsh1 values('4','jkl');
insert into testsh1 values('3','ghi');
insert into testsh2 values('1',500);
insert into testsh2 values('1',500);
insert into testsh2 values('3',1000);
insert into testsh2 values('3',1000);
insert into testsh2 values('4',1500);
insert into testsh2 values('4',1500);
insert into testsh2 values('1',500);
I am expecting the result below:
1 abc 500
2 def NULL
3 ghi 1000
3 ghi 1000
4 jkl 1500
4 jkl 1500
That is only records from testsh1 table can come as many times but from testsh2 only we need to bring unique and matching records on column idd.
Please help
Thanks

Answer 1

Hi Shavetha,
As the testsh2 has duplicates of each record, the DISTINCT of the record has to be record has to be applied.
Please Try this,
SELECT IDD, NAME, (SELECT DISTINCT BALANCE
                              FROM TESTSH2 B
                             WHERE B.IDD = A.IDD) BALANCE
  FROM TESTSH1 A;Which Outputs:
IDD     NAME     BALANCE
1     abc     500
2     def     
3     ghi     1000
4     jkl     1500
4     jkl     1500
3     ghi     1000Thanks,
Shankar