Introduction to Database System A candidate key is a determinant that determines all the other columns is a relation. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The activity of a file is a low percentages of number of records added or deleted from a file is a measure of the percentage of existing records updated during a run None of these refers to how closely the files fits into the allocated if high, reduces processing efficiency for sequential and nonsequential files is a low percentages of number of records added or deleted from a file is a measure of the percentage of existing records updated during a run None of these refers to how closely the files fits into the allocated if high, reduces processing efficiency for sequential and nonsequential files ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A form can be used to modify records All of these delete records format printed output None of these modify records All of these delete records format printed output None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to create a database user? CREATE USER MK USER All of the listed here ADD USER TO DATABASE CREATE USER MK USER All of the listed here ADD USER TO DATABASE ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator? Instance entity Subtype entity Supertype entity Archetype entity Instance entity Subtype entity Supertype entity Archetype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A number of related records that are treated as a unit is called batch file data field batch file data field ANSWER DOWNLOAD EXAMIANS APP
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