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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 10513Post New rsystems SQL PLSQL Interview Questions
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when will be the iocl interview results i faced interview on 8th september 2008 iam from electrical branch i faced interview for the post of electrical engineer??????????????????????//
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You are a project manager for Safari Outfitters. Your company is going to offer a new product line in the upcoming spring catalog. Your project team has 10 months to secure contracts with suppliers, finalize the designs, get the product into the catalog, and stock the warehouse. This is an example of: A. An assumption because the project team has worked on projects like this before and know they can meet the 10-month deadline B. An assumption because the project team has a limited amount of time to complete the project C. A constraint because the project team has a limited amount of time to complete the project D. A constraint because the project team is working with a new product line that hasn't been developed before
which of the following is allowed in a "C" arithematic instruction a) [] b) {} c) () d) none of the above
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Systematic random samp ling is to be used to select 5 addresses from an ordered list containing 500 addresses. A 1- in-100 systematic sample is used to select the 5 addresses. What is the chance that any specific address will be chosen.
