TATA Consultancy Services Interview Question


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2
of 2 vote

select name, count(name) from student group by name having count(name)>1

- sumit chauhan September 27, 2011 | Flag Reply
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0
of 0 votes

thnx sumit

- anushree99 September 27, 2011 | Flag
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0
of 0 vote

Try DISTINCT

- Mohit Agrawal September 26, 2011 | Flag Reply
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0
of 0 votes

we have to detect also that which ones are duplicated & how many times

- anushree99 September 26, 2011 | Flag
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0
of 0 votes

What about SELECT * FROM TABLE MINUS SELECT DISTINCT FROM TABLE

- MA September 26, 2011 | Flag
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0
of 0 votes

thnx mohit

- anushree99 September 27, 2011 | Flag
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0
of 0 vote

select distinct * from student; where student is table name

- Nabanita Biswas August 10, 2013 | Flag Reply
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0
of 0 vote

To find Duplicate entries in Oracle Database

select name,count(name) from student group by name having count(name)>1

To delete duplicate entries from Database

delete from student where rowid not in(select min(rowid) from student group by name)

- Vijay March 01, 2014 | Flag Reply
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0
of 0 votes

In postgresql we use ctid instead of rowid

- vijay April 02, 2014 | Flag


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