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?
Which of the following best describes the information contained in the data dictionary (or system catalog)?
Consider the Registration relation shown in the exhibit. Which of the following SQL statements would return all tuples that have course codes beginning with the letter M?
Consider the Dept1_Parts and Dept2_Parts relations shown in the exhibit. Which of the following SQL statements would create a set difference of the two relations with the widest variety of Structured Query Language dialects?
Consider the Stu_Act and Act_Fee tables shown in the exhibit. Which relational algebraic operation would yield the Activity Relation table in the exhibit?
Consider the relations shown in the exhibit. Due to restructuring, the sales department has been eliminated and the employees working in that department have been dismissed. All ID information is stored as integers. Which SQL statement would be used to return a relation with all information for the employees who have been dismissed?
The creation of intermediate entities occurs during the logical database design phase for an enterprise. It is used to resolve which types of relationships?
Consider the Information Engineering diagram in the exhibit showing a conceptual data model of the relations BUILDING and RESIDENT. What is the next step in refining the data model?
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 Information Engineering diagram shown in the exhibit. Building_ID, R_ID, Room_Count and Room_Num are integer numbers, whereas Bldg_Name, Location and Res_Name are all represented by variable-length strings with a maximum of 20 characters.
Which SQL statement best implements the RESIDENT relation shown in this diagram?
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