Difference between primary key and unique key ?
Answer Posted / guna
there is only one primary key for one table;
it can not acept null values;
any no uniquefor a table;
it can accept null values;
which the rows are unique value;
| Is This Answer Correct ? | 9 Yes | 18 No |
Post New Answer View All Answers
What is hot backup and logical backup?
What are a collation and state the different types of collation sensitivity?
What is the dynamic sql in oracle?
What is a nvl function?
What is an oracle database?
List out the types of joins.
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.
What are the types of trigger in oracle?
Please send me Informatica 8.1 certification dumps, my mail id mona85gupta@gmail.com
What is a nested table?
What are the different types of trigger and explain its various uses and functions?
Can we store pictures in the database and if so, how it can be done?
What is logical backup in oracle?
Why do I get java.lang.abstractmethoderror when trying to load a blob in the db?
How to connect to a local oracle 10g xe server?