Question: Which of the following describe the snapshot of the data in the database at a given instant in time?
Answer:
When we talk about the database, we must differentiate between the database schema which is logical design of the database and a database instance which is a snapshot of the data in the database at a given instant in time.
MCQ: Which of the following describe the snapshot of the data in the database at a given instant in time?
Explanation:
When we talk about the database, we must differentiate between the database schema which is logical design of the database and a database instance which is a snapshot of the data in the database at a given instant in time.
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Related Questions
- 1. Which of the following describes the relation name (table name), attributes, and their names?
- 2. __________ is the snapshot of the relation at a particular time. It consists of the data which is present inside the relation at a particular instance of time. Duplicate row entries are not allowed in the _____. Though in SQL, duplicate rows are allowed in the table.
- 3. A Database schema, along with primary key and foreign key dependencies, can be depicted pictorially by _________
- 4. The relational Algebra is a ____________ Query language.
- 5. Which of the following are the fundamental operations in the Relational Algebra?
- 6. The select, project and rename operations are called____
- 7. Which of the following is the Binary Operations?
- 8. The select operation selects tuples that satisfy a given predicate. We use the lowercase______ to denote selection
- 9. Suppose we want to list all loan numbers and the amount of the loans, but do not care about the branch name. Which of the following operation allows us to produce this relation?
- 10. The Project operation selects tuples with some attributes that we wish to include but some attribute we do not want to include in the final relation. We use the lowercase______ to denote Project operation.
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