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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 10540Post New rsystems SQL PLSQL Interview Questions
How will iot impact the businesses?
what is the difference between window & document in javascript?
What port number is 8080?
Mention some of the specialized grinding methods?
How to Change the root key ?
What is finger command in linux?
Why is continuous monitoring important?
Describe Internal CSS with it's Syntax?
What is the difference between aggregate table and materialized view?
Why do we need header files?
State & explain the various financial & non-financial incentives to motivate the people in an organisation.
what does the psychic phase do
Define fbus protocol?
How can we get the error when there is a problem to upload a file?
Explain goto name?
