Database Redesign Which of the following SQL statements are helpful in database redesign? Correlated subqueries only Both of the above are helpful None of these EXISTS/NOT EXISTS expressions only Correlated subqueries only Both of the above are helpful None of these EXISTS/NOT EXISTS expressions only ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The data model produced from the reverse engineering process is a true logical model. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign A correlated subquery is processed as a nested subquery. True False True False ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The data model that is produced from reverse engineering is: a conceptual model. None of these a logical model. an internal model. a conceptual model. None of these a logical model. an internal model. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which of the following modifications may not succeed? Changing a column data type from char to date Changing a column data type from numeric to char Neither of the above actions will succeed Both of the above actions should succeed Changing a column data type from char to date Changing a column data type from numeric to char Neither of the above actions will succeed Both of the above actions should succeed ANSWER DOWNLOAD EXAMIANS APP
Database Redesign How many copies of the database schema are typically used in the redesign process? Four One Three Two Four One Three Two ANSWER DOWNLOAD EXAMIANS APP
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