What Is The Difference Between Primary Key & Super Key
- 3 Answers
- 6215 Views
- Accenture, I also Faced
- E-Mail Answers
Answer Posted / tanmay dutta
Primary Key : Unique No. Not null.No duplicate.exam:Student_Id.
Super Key : Like (student_id + Student Name)
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
I have a table Events Events containing cardno,time,id,name--each id has a cardno my requirement is every day each employee swipe the card several times i want to calculate first and last time of each card the output should be name 1 2 6 7 in out in out holiday holiday xxx 09:30 06:30 09:40 06:45 where 1,2...... are dates for example january 1,2, etc. 6 and 7 are saturday and sunday how it is posssible
How do I completely remove sql server instance?
How to configure and test odbc dsn settings?
Write a SQL query in order to merge two different columns into single column?
What are locks in sql?
What is the default sql server instance name?
What is catalog views?
Define synonym?
What are the limitations/drawbacks or ssrs 2008 r2?
What is meant by dirty read?
Explain nested stored procedure. Syntax and an example for create nested stored procedure?
What happens if null values are involved in string operations?
Name few of the dcl commands in sql?
Explain different backup plans?
What are cursors in ms sql server?
