How to restrict the duplicate records in table valuesets

Answer Posted / shalini gupta

we can create a unique index as well as primary key
constrains to restrict dulpicate record. unique key allows
one null but primary key constrains does not allow null.

Is This Answer Correct ?    4 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What happens if the update subquery returns multiple rows?

798


How do I limit the number of rows returned by an oracle query after ordering?

868


How to drop a tablespace?

744


What is the dynamic sql in oracle?

806


11. Display the client number and name and the client number and name of the person who referred that client.

2087


What is oracle server autotrace in oracle?

847


How to create a temporary table in oracle?

930


What is Virtual Private Database in Oracle?

824


HI Friends Myself Manoj,i am from bengaluru.i have 1 yr of exp in PLSQL but not upto the mark..now attending interviews but m not able to clear even 1 round..i have attended 3 interviews till today.purpose of writing this query is,i want to know the intreview topics that interviewer going to ask frequently,mainly SCENARIO based questions.IF anybody have any PLSQL projects please give it to me,it will helps me alot.Thanks for your patience.

1191


How to turn on or off recycle bin for the session?

812


Difference between hot backup vs. Cold backup?

769


Can we save images in a database and if yes, how?

809


Where do we use decode and case statements?

745


What is oracle sid?

683


How to install oracle odbc drivers?

834