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Database System Concepts - Create Table Construct Quiz

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Database System Concepts - Create Table Construct Quiz

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Questions and Answers

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?

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?

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?

delete from instructor where salary < (select avg(salary) from instructor); Signup and view all the answers

After deleting tuples from the 'instructor' relation, what changes according to the text?

The average salary of instructors changes. Signup and view all the answers

What is the correct SQL operation to insert a new tuple into the 'course' relation?

insert into course values ('CS-437', 'Database Systems', 'Comp.Sci.', 4); Signup and view all the answers

In the context of database operations, what is typically done first before deleting specific tuples?

Identify the tuples to delete based on a condition. Signup and view all the answers

What is the Solution used in SQL to prevent recomputing the average or retesting tuples after deletion?

Compute averages and delete the tuples in one step. Signup and view all the answers

Which operation involves adding a new tuple to a relation in a database system?

Insertion Signup and view all the answers

When adding a new tuple to a table, the 'insert into' command should be followed by ___________.

values ('CS-437', 'Database Systems', 'Comp.Sci.', 4); Signup and view all the answers

Database System Concepts - Create Table Construct Quiz

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Questions and Answers

Which operation is NOT mentioned in the provided text?

What SQL operation is used to delete all instructors from the Finance department?

When deleting instructors associated with a department located in the Watson building, which subquery is used in the SQL statement?

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?

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?

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?

When adding a new tuple to a table, the 'insert into' command should be followed by ___________.

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