Which of the following is used to denote the selection operation in relational algebra ?
A. Pi (Greek)
B. Sigma (Greek)
C. Lambda (Greek)
D. Omega (Greek)
Answer:A
Which of the following is used to denote the selection operation in relational algebra ?
A. Pi (Greek) B. Sigma (Greek) C. Lambda (Greek) D. Omega (Greek)
Explanation:The select operation selects tuples that satisfy a given predicate.