Podcast
Questions and Answers
Which operation is NOT mentioned in the provided text?
Which operation is NOT mentioned in the provided text?
- Selection (correct)
- Deletion
- Insertion
- Updating
What SQL operation is used to delete all instructors from the Finance department?
What SQL operation is used to delete all instructors from the Finance department?
- delete all instructors from instructor;
- drop instructors finance;
- remove instructors in Finance;
- delete from instructor where dept_name = 'Finance'; (correct)
When deleting instructors associated with a department located in the Watson building, which subquery is used in the SQL statement?
When deleting instructors associated with a department located in the Watson building, which subquery is used in the SQL statement?
- select building from department where dept_name = 'Watson';
- select dept_name from department where building = 'Watson'; (correct)
- select building from instructor where dept_name = 'Watson';
- select dept_name from instructor where building = 'Watson';
Which SQL operation is used to delete instructors whose salary is less than the average salary of instructors?
Which SQL operation is used to delete instructors whose salary is less than the average salary of instructors?
After deleting tuples from the 'instructor' relation, what changes according to the text?
After deleting tuples from the 'instructor' relation, what changes according to the text?
What is the correct SQL operation to insert a new tuple into the 'course' relation?
What is the correct SQL operation to insert a new tuple into the 'course' relation?
In the context of database operations, what is typically done first before deleting specific tuples?
In the context of database operations, what is typically done first before deleting specific tuples?
What is the Solution used in SQL to prevent recomputing the average or retesting tuples after deletion?
What is the Solution used in SQL to prevent recomputing the average or retesting tuples after deletion?
Which operation involves adding a new tuple to a relation in a database system?
Which operation involves adding a new tuple to a relation in a database system?
When adding a new tuple to a table, the 'insert into' command should be followed by ___________.
When adding a new tuple to a table, the 'insert into' command should be followed by ___________.
