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Oracle SQL PLSQL Interview Questions
Questions Answers Views Company eMail

What is correlated sub-query?

7 37470

how instead of triger is helpful for mutating tables errors handlling ?

2 8493

What are the advantages of the packages

6 8650

what are the advantages of primary key over unique+notnull

7 18134

how to retrieve the top 3 salaries of the table using rownum

31 28136

what is the difference between union and union all

14 38216

What is the difference between join and union.

27 166337

declare l1 number := null; l2 number :=null; begin if l1=l2 then message('equal'); else if l1<>l2 then message('not equal'); else message('else'); end if; end if; end; What will be the output ?

7 10454

declare lowerl number:= 1; upperl number:= 3; num varchar2(10); begin for i into lowerl..upperl loop num:=num||to_char(lowerl); if i=3 then upperl:=5; end loop; message(num); What will be the output ?

3 6743

Given two tables Student(SID, Name, Course) and Level(SID, level) write the SQL statement to get the name and SID of the student who are taking course = 3 and at freshman level.

9 10986

What cursor type do you use to retrieve multiple recordsets?

17 58536

Two Methods of retrieving SQL?

7 50616

How do you optimize SQL queries ?

6 29213

How well can multiple sessions access the same data simultaneously ?

1 2036

Delete duplicate records in the emp table.

6 11402

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Oracle SQL PLSQL Interview Questions

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