Introduction to Database System Data encryption techniques are particularly useful for improving data integrity None of these All of these protecting data in data communication systems reducing storage space requirements improving data integrity None of these All of these protecting data in data communication systems reducing storage space requirements ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If a piece of data is stored in two places in the database, then None of these changing the data is one spot will cause data inconsistency storage space is wasted both (a) and (b) it can be more easily accessed None of these changing the data is one spot will cause data inconsistency storage space is wasted both (a) and (b) it can be more easily accessed ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a large DBMS each subschema contains every field in the logical schema each user can "see" only a small part of the entire database each user can access every sub¬schema all of the listed here each subschema contains every field in the logical schema each user can "see" only a small part of the entire database each user can access every sub¬schema all of the listed here ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to changes data in a table? INSERT UPDATE APPEND BROWSE INSERT UPDATE APPEND BROWSE ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Entity instances are associated by relationship classes. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relation in this form is free of all modification anomalies. Domain/key normal form First normal form Third normal form Second normal form Domain/key normal form First normal form Third normal form Second normal form ANSWER DOWNLOAD EXAMIANS APP
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