Bird
0
0

In PostgreSQL full-text search, what does the ts_rank function primarily calculate?

easy📝 Conceptual Q1 of 15
PostgreSQL - Full-Text Search
In PostgreSQL full-text search, what does the ts_rank function primarily calculate?
AThe frequency of a specific word in the database
BThe total number of words in a document
CThe length of the search query string
DThe relevance score of a document based on a text search query
Step-by-Step Solution
Solution:
  1. Step 1: Understand ts_rank purpose

    The ts_rank function computes a relevance ranking score for documents based on how well they match a full-text search query.
  2. Step 2: Eliminate incorrect options

    Options B, C, and D describe unrelated metrics (word count, query length, word frequency) which ts_rank does not calculate.
  3. Final Answer:

    The relevance score of a document based on a text search query -> Option D
  4. Quick Check:

    Does ts_rank measure relevance? Yes. [OK]
Quick Trick: ts_rank returns relevance score for text search matches [OK]
Common Mistakes:
  • Confusing ts_rank with word count functions
  • Assuming ts_rank returns boolean match results
  • Thinking ts_rank measures query length

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More PostgreSQL Quizzes