Which one of the following is a procedural language ?Domain relational calculusTuple relational calculusRelational algebraQuery language

To answer which of the options is a procedural language, we first need to understand what a procedural language is in the context of databases and query languages.

1. Definition of Procedural Language: A procedural language is a type of programming language that specifies a series of instructions for the computer to follow. In databases, it allows for the specification of procedures that define how data should be manipulated.

2. Analysis of Options:

   • Domain Relational Calculus: It is a non-procedural query language that focuses on what data to retrieve without detailing how to retrieve it.
   • Tuple Relational Calculus: Similar to domain relational calculus, it is also a non-procedural language and emphasizes what data to obtain rather than how to obtain it.
   • Relational Algebra: This is considered a procedural query language. It provides specific operations (like union, intersection, and difference) to manipulate relations, thus effectively detailing how to obtain the required data.
   • Query Language: This is a broad term that can refer to either procedural or non-procedural languages, depending on the context.

3. Conclusion: Based on the definitions and characteristics of each option, the appropriate choice is Relational Algebra, as it requires the specification of procedures for data retrieval and manipulation.

Final Answer

The procedural language among the options provided is Relational Algebra.