DBMS (Relational algebra)

Question

Write a query in relational algebra to select name of student of maximum age from a table std .

Std( rollno,name ,age)

Using aggregate function.

Comments

Aggregate function is in sql not in relational algebra

Answer 1

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Answer 2

This should work:

Good read(from Page 7 onwards):

https://www.google.co.in/url?sa=t&source=web&rct=j&url=http://users.cms.caltech.edu/~donnie/cs121/CS121Lec03.pdf&ved=2ahUKEwi-_uj8lPDaAhXMp48KHaiTADQQFjAPegQIBxAB&usg=AOvVaw305JDmITLsLO9uXn-jKP3M