SQL query to list, for each customer, his/her customer ID, order number placed by him/her and ratio of number of orders from that customer to that of total orders from all customers.

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Chapter 5, Problem 5.89PAE

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SQL query to list, for each customer, his/her customer ID, order number placed by him/her and ratio of number of orders from that customer to that of total orders from all customers.

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C) Which employees earn less salary than the average salary for the consultants who perform the same job? Show the employees first and last names, job id, salary, department name, and manager's last name. Sort the result by the employees’ employee id. D) For each department, find the manager who pays out the most in salaries. Show the department number, the manager's last name, and the total she/he pays each month. Sort by the department number. Here are the tables and the columns within the table Here are the tables and the columns within the table CONSULTANTS - CONSULTANT_ID- FIRST_NAME- LAST_NAME- EMAIL- PHONE_NUMBER- HIRE_DATE- JOB_ID- SALARY- COMMISSION_PCT- MANAGER_ID- DEPARTMENT_ID . COUNTRIES - COUNTRY_ID- COUNTRY_NAME-REGION_ID . CUSTOMERS - CUST_IDCUST_EMAILCUST_FNAMECUST_LNAMECUST_ADDRESSCUST_CITYCUST_STATE_PROVINCECUST_POSTAL_CODECUST_COUNTRYCUST_PHONECUST_CREDIT_LIMIT . DEPARTMENTS - DEPARTMENT_IDDEPARTMENT_NAMEMANAGER_IDLOCATION_ID . EMPLOYEES -…

Find your group number• The remainder after division of second to last digit of your student id by 3 is a.• The last digit of your student id is b.• Your group number is ab, which is an integer between 0 and 29.• If your group number is equal to ab=00 then take it as ab=01.Examples:• Student Id = 290316027 → Group = 27• Student Id = 290315043 → Group = 13• Student Id = 280315061 → Group = 01• Student Id = 270316085 → Group = 25• Student Id = 290315027 → Group = 27 my student Id is 280316014 but i didnt calculate ab.Can you help me .Thank you.

7. List all customers who were referred to the bookstore by another customer. List eachcustomer’s last name and the number of the customer who made the referral.