In query processing, the                        is the lowest-level operator to access data.

Related MCQs

• State true or false. i) Select operator is not a unary operator. ii) Project operator chooses subset of attributes or columns of a relation.
• A type of query that is placed within a WHERE or HAVING clause of another query is called
• A type of query that is placed within a WHERE or HAVING clause of another query is called
• Any recursive view must be defined as the union of two subqueries: a                query that is nonrecursive and a                      query.
• Relational Algebra is a                      query language that takes two relations as input and produces another relation as an output of the query.
• Relational Algebra is a __________ query language that takes two relations as input and produces another relation as an output of the query.
•                        combines the data manipulating power of SQL with the data processing power of Procedural languages.
• Which SQL Query is use to remove a table and all its data from the database?
• Which SQL Query is use to remove a table and all its data from the database?
• Which of the following are the process of selecting the data storage and data access characteristics of the database?