Introduction to Database System Which of the following is not a restriction for a table to be a relation? The columns must be ordered. No two rows in a table may be identical. The cells of the table must contain a single value. All of the entries in any column must be of the same kind. The columns must be ordered. No two rows in a table may be identical. The cells of the table must contain a single value. All of the entries in any column must be of the same kind. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System All instances of an entity class have the same attributes. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which command is used to select distinct subject (SUB) from the table (BOOK)? SELECT ALL FROM BOOK SELECT DISTINCT SUB FROM BOOK All of these SELECT SUB FROM BOOK None of these SELECT ALL FROM BOOK SELECT DISTINCT SUB FROM BOOK All of these SELECT SUB FROM BOOK None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A _____ means that one record in a particular record type can be related to many records in another record type and vice-versa. One-to-many relationship Many-to-one relationship Many-to-many relationship One-to-one relationship None of these One-to-many relationship Many-to-one relationship Many-to-many relationship One-to-one relationship None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The purpose of a database is to help people stop using spreadsheets. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A primary key is a composite key that was selected to be the main identifier for the relation. False True False True ANSWER DOWNLOAD EXAMIANS APP
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