How do you handle duplicate records in a database?

Answer Posted / hr@tgksolutions.com

• Use DISTINCT in queries to filter duplicates.
• Use ROW_NUMBER() to identify duplicates:
DELETE FROM Employees
WHERE id NOT IN (
SELECT MIN(id)
FROM Employees
GROUP BY name, email
);
• Implement unique constraints on key fields.

Is This Answer Correct ?    0 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

How to run the anonymous block again?

836


How to convert csv to table in oracle?

734


In what script is snap$ created? In what script is the scott/tiger schema created?

2481


What is the difference between "as" and "is" in an oracle stored procedure?

756


Can group functions be mixed with non-group selection fields?

754


Explain the use of compress option in exp command.

750


Explain the truncate in oracle?

733


How to drop an index in oracle?

809


How to check the oracle tns settings?

798


What is the use of aggregate functions in oracle?

805


how to convert .db (extention) database file into .dmp (extention ) for oracle database ?

2336


How do I manually uninstall oracle client?

771


How to load a large xml file?

820


Can we insert data in view oracle?

741


What happens in oracle commit?

773