Chapter 6, Problem 10RQ

Disjoint restrictions overlap?

Define each of the following terms:a. da ta definition languageb. da ta manipulation languagec. referential integrity constraintd. relational DBMS (RDBMS)e. schema

i need to write procedure for below  question. i asked same question and they gave ddl for schema that is not asked in question. i am clearing again i want to write procedure in Plpgsql language not in mysql or other language. provide solution that has procedure and language must be plpgsql.   Question- For this problem create a table called instructor_course_nums within the university database schema. Write a procedure that accepts an instructor ID as input. The procedure calculates the total number of course sections taught by that instructor, and adds a tuple to the instructor_course_nums table consisting of the instructors ID number, name, and total courses taught - call these attributes: ID, name, and tot_courses. If the instructor already has an entry in the table, then the procedure makes sure the total number of courses taught in the instructor_course_nums table is up-to-date. You must name your procedure: __insCourseNumsProc Where is your last name and is the day of the month…

Please help to write to these triggers in Postgresql: You should create a trigger, called price change, that adjusts the reserver routes with pending payment. I assume you have ticketed and reserver routes when the cost per mile of a train is change. (Table Ticket and Table Reservation)

Write Mysql code The database has three tables for tracking horse-riding lessons:   Horse with columns: ID - primary key RegisteredName Breed Height BirthDate     Student with columns: ID - primary key FirstName LastName Street City State Zip Phone EmailAddress     LessonSchedule with columns: HorseID - partial primary key, foreign key references Horse(ID) StudentID - foreign key references Student(ID) LessonDateTime - partial primary key   Write a SELECT statement to create a lesson schedule with the lesson date/time, horse ID, and the student's first and last names. Order the results in ascending order by lesson date/time, then by horse ID. Unassigned lesson times (student ID is NULL) should not appear in the schedule. Hint: Perform a join on the Student and LessonSchedule tables, matching the student IDs.

138. Metadata about the relations are stored in ________ a. File header b. Data dictionary c. Data query d. Data analyser

Why are field values sometimes coded?

plz help in sql In Triggers, BEFORE means before the changes are made in memory but after the changes are permanently saved to disk. Select one: a. True b. False

What exactly is metadata?   What exactly is metadata in the context of a result set?   When is it OK to utilise metadata from a result set?