In this post, we will solve Basics of Sets and Relations #7 HackerRank Solution. This problem (Basics of Sets and Relations #7) is a part of HackerRank Databases series.
Consider the following data table named Student.
Student Name Number Sex Nina 3412 F Mike 1234 M Nelson 2341 F
Here is another data table named Teaching Assistants
Subject ID Physics 3412 Chemistry 1111 Mathematics 2341
What is the count of rows returned in the following join operation?
Student ⊳⊲(Number=ID) Teaching Assistants
Only enter a single integer. Do not include any extra spaces or newlines.
Solution – Basics of Sets and Relations #7 – HackerRank Solution