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IN A TABLE HAVE ONE COLUMN PRIMARY KEY..IT WILL NOT ALLOWS NULL VALUES AND DUPLICATE VALUES..INSTEAD OF PRIMARY KEY WHY CANT WE USE UNIQUE AND NOT NULL.THESE TWO ALSO DOESNT ACCEPT NULL VALUES IN NOT NULL AND UNIQUE DOESNT ACCEPT DUPLICATE VALUES? SO WHAT IS THE DIFEERENCE BETWEEN(UNIQUE,NOT NULL) AND PRIMARY KEY??????
8 10734Post New rsystems SQL PLSQL Interview Questions
What is function overriding in c++?
How to publish a process to control room?
Explain working of francis turbine?
Make a data structure and implement an algorithm to print all the files in a directory. (The root directory can have sub-directories too.)
How do I download my contacts from outlook?
Have you handled SR and worked with Oracle for resolution of issues? If yes, how do you assign the priority while raising a SR?
Difference between e-r modeling and dimentional modeling?
Write a program to display a table of any given number?
What is the diff between the System.Array.CopyTo() and System.Array.Clone()?
Is microsoft iis free?
Give the order of sql select?
What is an overdraft?
Your default umask is 002. What does this mean?
What is your greatest achievement and why?
Can you explain how AI is used in personalized medicine for tailored treatment plans?
