Database Redesign Which of the following SQL statements are helpful in database redesign? Both of the above are helpful None of these Correlated subqueries only EXISTS/NOT EXISTS expressions only Both of the above are helpful None of these Correlated subqueries only EXISTS/NOT EXISTS expressions only ANSWER DOWNLOAD EXAMIANS APP
Database Redesign What SQL command can be used to delete columns from a table? ALTER TABLE TableName DROP COLUMN ColumnName ALTER TABLE TableName DROP ColumnName MODIFY TABLE TableName DROP COLUMN ColumnName MODIFY TABLE TableName DROP ColumnName ALTER TABLE TableName DROP COLUMN ColumnName ALTER TABLE TableName DROP ColumnName MODIFY TABLE TableName DROP COLUMN ColumnName MODIFY TABLE TableName DROP ColumnName ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The EXISTS keyword will be true if: neither of these two conditions is met. both of these two conditions are met. all rows in the subquery fail the condition only. any row in the subquery meets the condition only. neither of these two conditions is met. both of these two conditions are met. all rows in the subquery fail the condition only. any row in the subquery meets the condition only. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign How many copies of the database schema are typically used in the redesign process? Four Three Two One Four Three Two One ANSWER DOWNLOAD EXAMIANS APP
Database Redesign Which is not true of a correlated subquery? The processing of the SELECT statements is nested. EXISTS/NOT EXISTS is a form of a correlated subquery. They are very similar to a regular subquery. They can be used to verify functional dependencies. The processing of the SELECT statements is nested. EXISTS/NOT EXISTS is a form of a correlated subquery. They are very similar to a regular subquery. They can be used to verify functional dependencies. ANSWER DOWNLOAD EXAMIANS APP
Database Redesign The process of reading a database schema and producing a data model from that schema is known as: database design. data modeling. reverse engineering. None of these database design. data modeling. reverse engineering. None of these ANSWER DOWNLOAD EXAMIANS APP
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