Relational algebra is a ______ which takes instances of relations as input and yields instances of relations as output.
A. Relational query language
B. Structural query language
C. Procedural query language
D. Fundamental query language
Answer:C
Relational algebra is a ______ which takes instances of relations as input and yields instances of relations as output.
A. Relational query language B. Structural query language C. Procedural query language D. Fundamental query language