There is a big table with "n" of rows and 40 + columns .It
doesn't have primary key.How do you select the primary key.
In other words how do you get the duplicate records.
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Answer / nithin
Hi
I could possibly think of only one solution without using
group by clause.
create table emp_bkp as select distinct * from employee
drop table employee
rename emp_bkp to employee
Let me know if there is any other possible answer
| Is This Answer Correct ? | 3 Yes | 1 No |
Suppose Table name is Dup_Del with id as a column(consists
10,20,30,10,10,30,20)then
select * from Dup_Del
where rowid not in(select * from
(select min(rowid) from Dup_Del
group by id
);
the above query will give you the duplicate records. if you
want unique records then
select * from Dup_Del
where rowid in(select * from
(select min(rowid) from Dup_Del
group by id
);
| Is This Answer Correct ? | 0 Yes | 0 No |
> CREATE OR REPLACE FUNCTION FACTORIAL_1(factstr varchar2 ) 2 RETURN NUMBER AS 3 new_str VARCHAR2(4000) := factstr||'*' ; 4 fact number := 1 ; 5 BEGIN 6 7 WHILE new_str IS NOT NULL 8 LOOP 9 fact := fact * TO_NUMBER(SUBSTR(new_str,1,INSTR(new_str,'*')-1)); 10 new_str := substr( new_str,INSTR(new_str,'*')+1); 11 END LOOP; 12 13 RETURN fact; 14 15 END; explanation Above program?
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