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Database-Management-System
March 4, 2024
Database-Management-System
March 4, 2024
Database-Management-System
March 4, 2024
Database-Management-System
March 4, 2024

Question 8177 – SQL

SELECT operation in SQL is equivalent to

Correct Answer: D

Question 35 Explanation: 
SELECT operation in SQL perform vertical partitioning which is performed by projection operation in relational calculus but SQL is multi sets; hence (D).
A
the selection operation in relational algebra
B
the selection operation in relational algebra, except that SELECT in SQL retains duplicates
C
the projection operation in relational algebra
D
the projection operation in relational algebra, except that SELECT in SQL retains duplicates
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