Note: Only one of the tuples can be selected **Understanding SQL Query Results in a Relational Database**In this lesson, we will analyze the result of a SQL query on a table with duplicate tuples. Consider the table \( R(x,y) \) which currently contains the following rows (note that there are duplicates):\[ (1,2), (1,2), (2,3), (3,4), (3,4), (4,1), (4,1), (4,1), (4,2) \]We need to compute the result of the following SQL query:```sqlSELECT R1.x, R2.y, COUNT(*)FROM R R1, R R2WHERE R1.y = R2.xGROUP BY R1.x, R2.y;```To determine the result, we will follow these steps:1. **Join Condition**: Match rows from the table \( R \) as \( R1 \) and \( R2 \) such that \( R1.y = R2.x \).2. **Group By**: Group the results by \( R1.x \) and \( R2.y \).3. **Count**: For each group, count the number of matching rows.Based on the given data and following these steps:1. Identify all pairs \((R1.x, R2.y)\) such that \(R1.y = R2.x\): - \((1, 2)\) matches with \((2,3)\) - \((2,3)\) from \((3,4)\) - \((3,4)\) from \((4,1)\) - \((4,1)\) from \((1,2)\)2. Apply the `GROUP BY` clause: - Group the results by \( (R1.x, R2.y) \)3. Count the results in each group.By analyzing this, it becomes clear that the valid options for the count would be multiples of the matching conditions. From those, select an appropriate tuple count resulting in the correct format asked in the query.**Question:**Which of the following tuples is in the result?- \( a. (3,4,6) \)- \( b. (3,2,6) \)- \( c. (3,2,2) \) (Correct Answer)- \( d. (4

SOLUTION -Provided the Creation, Insertion, and Selection queries performed on given tables and gave…

The table R(x,y) currently has the following tuples (note there are duplicates): (1,2), (1,2), (2,3), (3 SELECT R1.x, R2.y, COUNT(*) FROM R R1, R R2 WHERE R1.y = R2.x GROUP BY R1.x, R2.y; Which of the following tuples is in the result? O a.(3,4,6) Ob.(3, 2, 6) (3,2,2) 133

The table R(x,y) currently has the following tuples (note there are duplicates): (1,2), (1,2), (2,3), (3 SELECT R1.x, R2.y, COUNT(*) FROM R R1, R R2 WHERE R1.y = R2.x GROUP BY R1.x, R2.y; Which of the following tuples is in the result? O a.(3,4,6) Ob.(3, 2, 6) (3,2,2) 133

New Perspectives on HTML5, CSS3, and JavaScript

6th Edition

ISBN:9781305503922

Author:Patrick M. Carey

Publisher:Patrick M. Carey

Chapter14: Exploring Object-based Programming: Designing An Online Poker

Section14.1: Visual Overview: Custom Objects, Properties, And Methods

Problem 7QC

See similar textbooks

Related questions

Q: Floating-point struct Part 1 Define a struct Single that describes the bit layout for a…

A: According to the information given:- We have to define the single precision floating point numbers.

Q: Two words are anagrams of each other if they contain the same letters in them. So left is an anagram…

A: The solution to the given problem is below.

Q: Q3: Superheroes Supervillains are tired of Toronto condo rental prices, so they are leaving Toronto…

A: import bisectnumberOfSuperHeroes = int(input())# reading names of super heroesnames =…

Q: are some ways you can make code more efficient when using if-else blocks?

A: some ways you can make code more efficient when using if-else blocks

Q: selection and loop structures are similar in that the tested condition that begins either structure…

A: The selection structure is used for performing processes based on whether the Boolean condition is…

Q: 2) Design NFA that accepts the set of strings over (a, b} such that there should be at least one…

A: The Answer is

Q: Explain the use of cast operator.

A: The operator parentheses is used to perform cast operations in C#. The destination data type is…

Q: Give a program in C to count total number of alphabets, digits, and special characters in a string.

A: #include <string.h> int main(){ char s[1000]; int…

Concept explainers

Heap Sort

A Heap is a type of data structure that is built on trees. It's a binary tree that's virtually complete. Except for the very bottom level, all levels of the tree must be filled in a heap. The last (bottom) level should be filled from left to right. The heap data structure is used for the efficient implementation of priority queues.Heap can be of two types:

Question

Note: Only one of the tuples can be selected

**Understanding SQL Query Results in a Relational Database**

In this lesson, we will analyze the result of a SQL query on a table with duplicate tuples. Consider the table \( R(x,y) \) which currently contains the following rows (note that there are duplicates):

\[ (1,2), (1,2), (2,3), (3,4), (3,4), (4,1), (4,1), (4,1), (4,2) \]

We need to compute the result of the following SQL query:

```sql
SELECT R1.x, R2.y, COUNT(*)
FROM R R1, R R2
WHERE R1.y = R2.x
GROUP BY R1.x, R2.y;
```

To determine the result, we will follow these steps:

1. **Join Condition**: Match rows from the table \( R \) as \( R1 \) and \( R2 \) such that \( R1.y = R2.x \).

2. **Group By**: Group the results by \( R1.x \) and \( R2.y \).

3. **Count**: For each group, count the number of matching rows.

Based on the given data and following these steps:

1. Identify all pairs \((R1.x, R2.y)\) such that \(R1.y = R2.x\):
- \((1, 2)\) matches with \((2,3)\)
- \((2,3)\) from \((3,4)\)
- \((3,4)\) from \((4,1)\)
- \((4,1)\) from \((1,2)\)

2. Apply the `GROUP BY` clause:
- Group the results by \( (R1.x, R2.y) \)

3. Count the results in each group.

By analyzing this, it becomes clear that the valid options for the count would be multiples of the matching conditions. From those, select an appropriate tuple count resulting in the correct format asked in the query.

**Question:**
Which of the following tuples is in the result?

- \( a. (3,4,6) \)
- \( b. (3,2,6) \)
- \( c. (3,2,2) \) (Correct Answer)
- \( d. (4

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1: Definition

Step 2: code

Step 3: Output

Solution

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

How is an array stored in main memory? How is a linked list stored in main memory? What are their comparative advantages and disadvantages? Give examples of data that would be best stored as an array and as a linked list.
_______________ is a special purpose programming language for accessing and manipulating data stored in a relational database.
The implementation of a queue in an array, as given in this chapter, uses the variable count to determine whether the queue is empty or full. You can also use the variable count to return the number of elements in the queue. On the other hand, class linkedQueueType does not use such a variable to keep track of the number of elements in the queue. Redefine the class linkedQueueType by adding the variable count to keep track of the number of elements in the queue. Modify the definitions of the functions addQueue and deleteQueue as necessary. Add the function queueCount to return the number of elements in the queue. Also, write a program to test various operations of the class you defined.
4. Repeat Programming Exercise 3 by declaring numl, num2, and num3, and average of type double. Store 75.35 into numl, -35.56 into num2, and 15.76 into num3.