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- Question
The use of the double NOT EXISTS can be used to find rows that do not match some specified condition.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The SQL-92 command to change a table name is RENAME TABLE.
Options- A. True
- B. False Discuss
- 2. A correlated subquery is processed as a nested subquery.
Options- A. True
- B. False Discuss
- 3. The data model produced from the reverse engineering process is a true logical model.
Options- A. True
- B. False Discuss
- 4. Database redesign is especially difficult if the database has no data.
Options- A. True
- B. False Discuss
- 5. If a database is built correctly the first time, it will not have to be redesigned.
Options- A. True
- B. False Discuss
- 6. Oracle will let you define Notepad as your default editor, and whenever you type NOTEPAD, SQL*Plus will invoke Notepad.
Options- A. True
- B. False Discuss
- 7. The left-leaning slash tells Oracle to execute whatever statement is in the buffer.
Options- A. True
- B. False Discuss
- 8. Oracle maintains a System Change Number (SCN) which is a database-wide value that is incremented by Oracle whenever database changes are made.
Options- A. True
- B. False Discuss
- 9. Money is defined in Oracle with the Currency data type.
Options- A. True
- B. False Discuss
- 10. Oracle commands, column names, table names, view names and all other database elements are case sensitive.
Options- A. True
- B. False Discuss
Database Redesign problems
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