Database Redesign How many copies of the database schema are typically used in the redesign process? Three One Two Four Three One Two Four ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which is not true of a correlated subquery? EXISTS/NOT EXISTS is a form of a correlated subquery. They can be used to verify functional dependencies. The processing of the SELECT statements is nested. They are very similar to a regular subquery. EXISTS/NOT EXISTS is a form of a correlated subquery. They can be used to verify functional dependencies. The processing of the SELECT statements is nested. They are very similar to a regular subquery. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign If a database is built correctly the first time, it will not have to be redesigned. True False True False ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Database redesign is especially difficult if the database has no data. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Adding null columns to a table is straightforward. True False True False ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which of the following modifications may not succeed? Changing a column data type from char to date Both of the above actions should succeed Neither of the above actions will succeed Changing a column data type from numeric to char Changing a column data type from char to date Both of the above actions should succeed Neither of the above actions will succeed Changing a column data type from numeric to char ANSWER DOWNLOAD EXAMIANS APP
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