The ER diagram of the database is given above.Write the following queries.1.Write a query to get the Average salary of all employees working as Programmers.Hint: Use the employees table. regionscountrieslocationsREGION_ IDCOUNTRY_IDCOUNTRY_NAME VARCHAR2(40)CHAR(2)LOCATION_IDSTREET ADDRESS VARCHAR2(25)NUMBERNUMBERREGION_NAMEVARCHAR2(25)REGION_IDNUMBERPOSTAL CODEVARCHAR2(12)CITYVARCHAR2(30)STATE PROVINCE VARCHAR2(12)COUNTRY_IDCHAR(2)departmentsemployeesDEPARTMENT_IDDEPARTMENT_NAME VARCHAR2(30)NUMBERYEMPLOYEE IDNUMBERFIRST NAMELAST_NAMEVARCHAR2(20)VARCHAR2(25)VARCHAR2(25)VARCHAR2(20)jobsMANAGER_IDNUMBERJOB_IDLOCATION_IDNUMBEREMAILVARCHAR2(10)PHONE_NUMBERVARCHAR2(35)MIN SALARY NUMBERMAX_SALARY NUMBERJOB_TITLEHIRE DATEDATEJOB_IDVARCHAR2(10)SALARYNUMBERjob_historyCOMMISSION_PCT NUMBEREMPLOYEE_IDNUMBERMANAGER_IDDEPARTMENT_IDNUMBERYSTART DATEjob_gradesDATENUMBEREND DATEDATEGRADE LEVEL VARCHAR2(2)LOWEST_SAL NUMBERHIGHEST SAL KUMBERJOB_IDVARCHAR2(10)00DEPARTMENT_IDNUMBER

Use subquery to get all job_id where job_title is programmer. In outer query find avg(salary) .

Answered: The ER diagram of the database is given…

The ER diagram of the database is given above. Write the following queries. 1.Write a query to get the Average salary of all employees working as Programmers. Hint: Use the employees table.

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter6: Additional Database Objects

Section: Chapter Questions

Problem 19MC

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Having this information. StudentsAttribute Name Data TypeStudentID char(11)FirstName varchar(20)LastName varchar(20)Gender char(1)DateofBirth date CoursesAttribute Name Data TypeCourseCode varchar(6)CourseName varchar(70)Level char(2)Credits int RegistrationAttribute Name Data TypeStudentID char(11)CourseCode varchar(6)Grade decimal(2, 1) Write SQL code to: 1. How many courses are there on each level? 2. What is the average grade of courses that have been taken by the student with student ID 861103-2438? 3. Which students (studentID only) have the highest grade for the course ‘CS052’? 4. Find the courses (course codes only) that have been taken by both the student 861103-2438 and the student 123456-0980.
Having this information. StudentsAttribute Name Data TypeStudentID char(11)FirstName varchar(20)LastName varchar(20)Gender char(1)DateofBirth date CoursesAttribute Name Data TypeCourseCode varchar(6)CourseName varchar(70)Level char(2)Credits int RegistrationAttribute Name Data TypeStudentID char(11)CourseCode varchar(6)Grade decimal(2, 1) Write SQL code to: 1. What are the student ID, the names, and birthday of the female students who were born before the last day of 1992? 2. How many students are registered in the course “PHY210”? 3. How many courses are offered by the department of Computer Science (i.e. course codes CS***)? 4. Which course(s) (couseCode and courseName) of level G1 give 5 credits?
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A unique identifier for a data row that consists of more than one field is commonly called a: primary plus key composite primary key foreign key none of the above
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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.
Use 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 for Feb 1, 2020 with the lesson date/time, student's first and last names, and the horse's registered name. Order the results in ascending order by lesson date/time, then by the horse's registered name. Make sure unassigned lesson times (student ID is NULL) appear in the results. Hint: Perform a join on the LessonSchedule, Student, and Horse tables, matching the student IDs and horse IDs.
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