Sign Up Login


  1. Categories >> Software >> Databases >> SQL PLSQL
  2. Suggest New Category

How to retrieve Duplicate Rows only in a Table?
Suppose if a Table Name is "Education". It consists of
multiple columns. Then if we insert rows into this table
with duplicate records then how can we retrieve only
duplicate records from that table?

Question Posted / seshu

Answers were Sorted based on User's Feedback



How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / lakshmi narayana

select * from emp a ,
(select empno,count(*) from emp group by empno having count
(*) > 1) b
where a.empno = b.empno

Is This Answer Correct ?    27 Yes 10 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / kalaiselvan.j

select count(*),column_name from table_name group by
column_name having count(*)>1

Is This Answer Correct ?    14 Yes 0 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / smita

select a.empno, a.empname from education a,
(select empno, count(*) cnt from education group by empno
having count(*) > 1) b
where a.empno = b.empno

is the correct answer

Is This Answer Correct ?    12 Yes 5 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / cesar di sanctis

select * from <table_name>
where <column_name> in
(select <column_name>
from <table_name>
group by <column_name>
having count(*) > 1)

Is This Answer Correct ?    6 Yes 0 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / lakshmi

In the above query we have to add distinct before *. Else
duplicate rows will be fetched twice.

Thanks,
Lakshmi

Is This Answer Correct ?    9 Yes 4 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / seshu

SELECT RNO,NAME,COUNT(*) REP_COL FROM Education GROUP BY
RNO,NAME having Count(*)>1;

Is This Answer Correct ?    7 Yes 3 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / amit

select * from taruntest1 b where rowid not in (select min
(rowid) from taruntest1 a where a.a=b.a );

Is This Answer Correct ?    8 Yes 5 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / balaji

For Sample:
----------

select count(pmid) as Occurances,pmid from tablename group
by pmid having count(pmid)>1

Is This Answer Correct ?    7 Yes 5 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / rajesh kumar patnaik

SELECT ProductName
FROM Products
WHERE (ProductName IN
(SELECT ProductName
FROM Products
GROUP BY ProductName
HAVING COUNT(*) > 1))

Is This Answer Correct ?    8 Yes 6 No

How to retrieve Duplicate Rows only in a Table? Suppose if a Table Name is "Education". ..

Answer / aravind

select SPAN_UUID, SPAN_UNIT_UUID, count(*) from
SPAN_SPAN_UNIT group by SPAN_UUID, SPAN_UNIT_UUID having
count(*) > 1;

Is This Answer Correct ?    4 Yes 2 No

Post New Answer

More SQL PLSQL Interview Questions

What is difference between primary and secondary key?

0 Answers  

what is the Default Libraries for Oracle Report 6i

0 Answers   IBM,

what is an execution plan? When would you use it? How would you view the execution plan? : Sql dba

0 Answers  

Enlist the data types that can be used in pl/sql?

0 Answers  

Why does sql need a server?

0 Answers  

Show how functions and procedures are called in a pl/sql block.

0 Answers  

What is pls integer?

0 Answers  

What are the advantages of indexing?

0 Answers  

How do you delete duplicates in sql query using rowid?

0 Answers  

What does subquery mean in sql?

0 Answers  

how to include character strings in sql statements? : Sql dba

0 Answers  

what are the differences between procedure-oriented languages and object-oriented languages? : Sql dba

0 Answers  

For more SQL PLSQL Interview Questions Click Here
Categories