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Deloitte SQL PLSQL Interview Questions
Questions Answers Views Company eMail

Differences between UNIQUE and DISTINCT in select statements

26 135708

Hi, Can anybody please explain me the flow of the below query. I am not able to understand how this query works. This query is for finding the Nth highest salary.. SELECT DISTINCT (a.sal) FROM EMP A WHERE &N = (SELECT COUNT (DISTINCT (b.sal)) FROM EMP B WHERE a.sal<=b.sal); If N = 2 then second highest salary will be the o/p. If N = 3 then third highest salary will be the o/p. and so on.. Thanks, Nitin

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Deloitte SQL PLSQL Interview Questions


Un-Answered Questions

Whether use to safe backup log feature in mongodb?

5


How does human feedback improve AI models?

95


What is a primary key?

954


Difference between __str__ and __repr__ in python?

1046


Is unix a coding language?

892


What happens when submit button is clicked?

942


What is the java virtual machine (jvm)?

1095


How can you check whether a record is valid record or Invalid record using ADO control or Object?

1939


You need to migrate the ms access database tables to oracle. What steps will you take?

820


What are diffrent type of road taxes?

2028


Is big data unstructured?

525


What are the major differences between jmeter and load runner.

722


When should we use Transactional RFC?

1157


What is the pricing model for sap s/4hana?

182


What is a producer and a consumer endpoint?

5