Database Redesign Changing cardinalities in a database is: is impossible to do, so a new database must be constructed and the data moved into it. a common database design task. a database design task that never occurs. a rare database design task, but does occur. is impossible to do, so a new database must be constructed and the data moved into it. a common database design task. a database design task that never occurs. a rare database design task, but does occur. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign How many copies of the database schema are typically used in the redesign process? Two Three One Four Two Three One Four ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Some organizations take the stand that no application should ever employ the true name of a table. False True False True ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The EXISTS keyword will be true if: both of these two conditions are met. all rows in the subquery fail the condition only. neither of these two conditions is met. any row in the subquery meets the condition only. both of these two conditions are met. all rows in the subquery fail the condition only. neither of these two conditions is met. any row in the subquery meets the condition only. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which is not true of a correlated subquery? EXISTS/NOT EXISTS is a form of a correlated subquery. The processing of the SELECT statements is nested. They are very similar to a regular subquery. They can be used to verify functional dependencies. EXISTS/NOT EXISTS is a form of a correlated subquery. The processing of the SELECT statements is nested. They are very similar to a regular subquery. They can be used to verify functional dependencies. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which of the following modifications may not succeed? Both of the above actions should succeed Changing a column data type from numeric to char Neither of the above actions will succeed Changing a column data type from char to date Both of the above actions should succeed Changing a column data type from numeric to char Neither of the above actions will succeed Changing a column data type from char to date ANSWER DOWNLOAD EXAMIANS APP
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