Which type of relational integrity is violated if a primary key in a database has a null value?

Which subset of Structured Query Language (SQL) is used to limit access to a database or its data?

FROM Registration WHERE
Consider the following relational algebraic expression: Which of the following SQL Course_Code = ‘A4343’;
statements is equivalent to this relational algebraic expression?

Consider the following DBDL description of an entity: Teachers (teach_num: variable length character string length 10 NOT NULL teach_name: variable length character string length 10 NOT NULL) Primary Key: teach_num which integrity constraint is satisfied?

Which of the following definitions best describes an entity?

A large enterprise uses a two-tier database architecture and runs complex database applications. Which term best describes the client in this system?

Consider the following four database design activities:

1 – Design user views.
2 – Select a DBMS.
3 – Apply normalization.
4 – Determine entities.

Which choice shows the correct ordering of these activities, from first to last, by assigned numbers?

Your company must choose which type of database to use for a new project. Which of the following lists three characteristics of file-based database systems?

Which process is used to prevent the current database operation from reading or writing a data item while that data item is being accessed by another operation?

Consider the following database information:

domain s_id: integer domain grd: fixed length
character string length 1

STUDENT_GRADE(
Student_Number: s_id NOT NULL
Grade: grd ) Primary Key
Student_Number

During which phase of the database design process would this information be developed?