Earn $100 Online Daily. Work From Home. Click Here

What is the correct answer?


A table can have only one

A. Secondary key

B. Alternate key

C. Unique key

D. Primary key

Related Questions

Between DRAM and magnetic disk storage another form of memory, called… Which of the following is not a property of transactions? DBMS helps achieve The full form of GUI is _________ In b-tree the number of keys in each node is than the number of its children. Which of the following is not a consequence of concurrent operations? Which of the following is a reason to model data? ______contains information that defines valid values that are stored in… Which of the following constitutes a basic set of operations for manipulating… Which one is true statement : In a relational schema, each tuple is divided into fields called A table can have only one According to the levels of abstraction, the schema at the intermediate… In SQL the statement select * from R, S is equivalent to What is data integrity? Which of the syntax is correct for insert statement? i) insert into values… The statement that is executed automatically by the system as a side effect… The transactions like adding an employee, enrolling a student in a course… Which of the following ensures the atomicity of the transaction? DROP is a statement in SQL. Which of the following aggregate functions does not ignore nulls in its… The normal form that is not necessarily dependency preserving is A ____ key specifies a uniqueness constraint that no two distinct tuples… Change Staff table by removing default of Assistant for position column A data type or format is specified for each _________ In SQL, testing whether a subquery is empty is done using The common column is eliminated in The fact that information in the data warehouse changes far less often… The relational model is based on the concept that data is organized and… A ______ module is typically designed so that it will run on a user workstation…