FSS interview questions:
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1,types of constraints.

2,write a programme to insert name and employee id into employee table using by cursor?

3,I have one table one column already having not null Constraint please write a query to change the constraint as NuLL without losing data?

4,delete duplicate row?

5,fetch 2nd max salary

6,difference between Equi Join and self join 

7,what is the usage of synonyms.

8,tel about predefined exception

9,I want to identify how much data updated in table used of anonymous block?how will you identify 

10,what is the usage of no-data-found and too many rows?

11,fetch 2nd and 3rd max salary only Dept wise

12, what is the maximum level number in sequences .

Will you able to decrease the count