SQL Joins

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Joins are used to combine rows from two or more tables based on related columns between them. Joins allow you to retrieve data from multiple tables simultaneously, enabling you to create complex queries that fetch data from different sources. There are different types of joins in SQL, including: INNER JOIN Returns only the rows that have matching values in both tables based on the specified join condition. It discards non-matching rows from both tables. Example:           create table t1(x int); insert into t1 values(1); insert into t1 values(1); insert into t1 values(0); create table t2(y int); insert into t2 values(0); insert into t2 values(1); insert into t2 values(1);           select * from t1 inner join t2 on t1.x = t2.y Output: 2. LEFT JOIN (or) LEFT OUTER JOIN Returns all the rows from the left (or first) table and the matching rows from the right (or second) table. If there is no match, NULL values are
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Clustering and Similarity: Retrieving Documents Quiz Answers

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1) Top word count words for Elton John

(the, john, singer)
(england, awards, musician)
(the, in, and)
(his, the, since)
(rock, artists, best)

2) Top TF-IDF words for Elton John

(furnish,elton,billboard)
(john,elton,fivedecade)
(the,of,has)
(awards,rock,john)
(elton,john,singer)

3) The cosine distance between 'Elton John's and 'Victoria Beckham's articles (represented with TF-IDF) falls within which range?

0.1 to 0.29
0.3 to 0.49
0.5 to 0.69
0.7 to 0.89
0.9 to 1.0

4) The cosine distance between 'Elton John's and 'Paul McCartney's articles (represented with TF-IDF) falls within which range?

0.1 to 0.29
0.3 to 0.49
0.5 to 0.69
0.7 to 0.89
0.9 to 1

5) Who is closer to 'Elton John', 'Victoria Beckham' or 'Paul McCartney'?

Victoria Beckham
Paul McCartney

6) Who is the nearest neighbor to 'Elton John' using raw word counts?

Billy Joel
Cliff Richard
Roger Daltrey
George Bush

7) Who is the nearest neighbor to 'Elton John' using TF-IDF?

Roger Daltrey
Rod Stewart
Tommy Haas
Elvis Presley

8) Who is the nearest neighbor to 'Victoria Beckham' using raw word counts?

Stephen Dow Beckham
Louis Molloy
Adrienne Corri
Mary Fitzgerald (artist)

9) Who is the nearest neighbor to 'Victoria Beckham' using TF-IDF?

Mel B
Caroline Rush
David Beckham
Carrie Reichardt

Comments

  1. Shopper WartaSurabayaMay 9, 2020 at 10:01 AM

    no.8 wrong

    ReplyDelete
  2. UnknownJanuary 15, 2022 at 8:46 AM

    8th answer is correct

    ReplyDelete
  3. AnonymousApril 20, 2022 at 12:41 AM

    Clustering And Similarity: Retrieving Documents Quiz Answers >>>>> Download Now

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