Quiz Discussion

What type of join is needed when you wish to include rows that do not have matching values?

Course Name: SQL -Structured Query Language

  • 1]

    Equi-join

  • 2]

    Natural join

  • 3]

    Outer join

  • 4]

    All of the mentioned

Solution
No Solution Present Yet

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# Quiz
1
Discuss

The operation which is not considered a basic operation of relational algebra is

  • 1]

    Join

  • 2]

    Selection

  • 3]

    Union

  • 4]

    Cross product

Solution
2
Discuss

The____condition allows a general predicate over the relations being joined.

  • 1]

    On

  • 2]

    Using

  • 3]

    Set

  • 4]

    Where

Solution
3
Discuss

How many join types in join condition:

  • 1]

    2

  • 2]

    3

  • 3]

    4

  • 4]

    5

Solution
4
Discuss

How many tables may be included with a join?

  • 1]

    One

  • 2]

    Two

  • 3]

    Three

  • 4]

    All of the mentioned

Solution
5
Discuss

In SQL the statement select * from R, S is equivalent to

  • 1]

    Select * from R natural join S

  • 2]

    Select * from R cross join S

  • 3]

    Select * from R union join S

  • 4]

    Select * from R inner join

Solution
6
Discuss

Which are the join types in join condition:

  • 1]

    Cross join

  • 2]

    Natural join

  • 3]

    Join with USING clause

  • 4]

    All of the mentioned

Solution
7
Discuss

Which of the join operations do not preserve non-matched tuples?

  • 1]

    Left outer join

  • 2]

    Right outer join

  • 3]

    Inner join

  • 4]

    Natural join

Solution
8
Discuss

Which join refers to join records from the right table that have no matching key in the left table are include in the result set:

  • 1]

    Left outer join

  • 2]

    Right outer join

  • 3]

    Full outer join

  • 4]

    Half outer join

Solution
9
Discuss
SELECT * FROM student JOIN takes USING (ID);

The above query is equivalent to

  • 1]
    SELECT *
    FROM student INNER JOIN takes USING (ID);

     

  • 2]
    SELECT *
    FROM student OUTER JOIN takes USING (ID);

     

  • 3]
    SELECT *
    FROM student LEFT OUTER JOIN takes USING (ID);

     

  • 4]

    None of the mentioned

Solution
# Quiz