The data in this table is as follows: Team Dragons The latest scores from the Japanese Baseball League are in the table with schema Scores(Team, Day, Opponent, Runs) Tigers Carp Hawks Buffaloes Lions 0 Bay Stars Friday Tigers 2 Golden Eagles Friday Swallows 5 What is the result of executing the following query on this data: Oa. Lions SELECT S1 Team, S2.Team FROM Scores S1, Scores S2 WHERE S1.Opponent = S2.Opponent AND S1.Team <> S2.Team; OC. Hawks Day Sunday Sunday Bay Stars 9 Monday Dragons 10 Monday Giants 7 Tuesday Tigers 2 Tuesday Giants Identify in the list below a tuple of the result. O b. Golden Eagle O d. Bay Stars Golden Eagle Opponent Runs Swallows 4 Lions Hawks Buffaloes 4

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Question
**Latest Scores from the Japanese Baseball League**

Here is a table that displays the latest scores from the Japanese Baseball League, structured as (Team, Day, Opponent, Runs):

| Team           | Day     | Opponent  | Runs |
|----------------|---------|-----------|------|
| Dragons        | Sunday  | Swallows  | 4    |
| Tigers         | Sunday  | Bay Stars | 9    |
| Carp           | Monday  | Dragons   | 10   |
| Hawks          | Monday  | Giants    | 7    |
| Buffaloes      | Tuesday | Tigers    | 2    |
| Lions          | Tuesday | Giants    | 0    |
| Bay Stars      | Friday  | Tigers    | 2    |
| Golden Eagles  | Friday  | Swallows  | 5    |

**Database Query Example**

The query below is run on this data to find pairs where a team’s opponent matches another team’s opponent and the teams are different.

```sql
SELECT S1.Team, S2.Team
FROM Scores S1, Scores S2
WHERE S1.Opponent = S2.Opponent AND S1.Team <> S2.Team;
```

**Exercise: Identify a Valid Tuple**

Based on the query results, identify a valid tuple from the options below:

- a. Lions, Golden Eagle
- b. Golden Eagle, Buffaloes
- c. Hawks, Lions
- d. Bay Stars, Hawks

By evaluating the data and the query, you can determine which option is correct. Consider cross-referencing the Opponent values to see which teams faced the same opponents on different days.

**Explanation of Results**

- Option (c) **Hawks, Lions**: Both "Hawks" and "Lions" have "Giants" as their opponent.
  
So, in this case, option (c) is the correct answer.
Transcribed Image Text:**Latest Scores from the Japanese Baseball League** Here is a table that displays the latest scores from the Japanese Baseball League, structured as (Team, Day, Opponent, Runs): | Team | Day | Opponent | Runs | |----------------|---------|-----------|------| | Dragons | Sunday | Swallows | 4 | | Tigers | Sunday | Bay Stars | 9 | | Carp | Monday | Dragons | 10 | | Hawks | Monday | Giants | 7 | | Buffaloes | Tuesday | Tigers | 2 | | Lions | Tuesday | Giants | 0 | | Bay Stars | Friday | Tigers | 2 | | Golden Eagles | Friday | Swallows | 5 | **Database Query Example** The query below is run on this data to find pairs where a team’s opponent matches another team’s opponent and the teams are different. ```sql SELECT S1.Team, S2.Team FROM Scores S1, Scores S2 WHERE S1.Opponent = S2.Opponent AND S1.Team <> S2.Team; ``` **Exercise: Identify a Valid Tuple** Based on the query results, identify a valid tuple from the options below: - a. Lions, Golden Eagle - b. Golden Eagle, Buffaloes - c. Hawks, Lions - d. Bay Stars, Hawks By evaluating the data and the query, you can determine which option is correct. Consider cross-referencing the Opponent values to see which teams faced the same opponents on different days. **Explanation of Results** - Option (c) **Hawks, Lions**: Both "Hawks" and "Lions" have "Giants" as their opponent. So, in this case, option (c) is the correct answer.
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