Introduction to Database System A subtype entity is a special case of another entity called a supertype entity. 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 None of these refers to how closely the files fits into the allocated is a measure of the percentage of existing records updated during a run if high, reduces processing efficiency for sequential and nonsequential files is a low percentages of number of records added or deleted from a file None of these refers to how closely the files fits into the allocated is a measure of the percentage of existing records updated during a run if high, reduces processing efficiency for sequential and nonsequential files ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to select only one copy of each set of duplicable rows All of these SELECT UNIQUE SELECT DISTINCT SELECT DIFFERENT None of these All of these SELECT UNIQUE SELECT DISTINCT SELECT DIFFERENT None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a relation, the rows are sometimes called "records". False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If you want to group the records in the abc database, you could use the Jobcode as the _____. Index Delete Update Sort Key Index Delete Update Sort Key ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A command that lets you change one or more fields in a record is All of these None of these Look-up Insert Modify All of these None of these Look-up Insert Modify ANSWER DOWNLOAD EXAMIANS APP
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