borrowerNo B023 B141 B687 name Ted Brown Irina Petkevits Nancy Herman dateOfBirth address email 6/22/1997 250 Main St, 1B tbrown@gmail.com 9/14/1992 32-52 78th Av ipetkevits@yahoo.com 5/29/2001 36 Broad St, 3F nherman@bmcc.cuny.edu BookLoan ISBN copyNo dateOut dateDue borrowerNo 2220000002 2 9/12/2018 10/3/2018 B023 5550000005 1 9/2/2018 9/23/2018 B141 9990000009 2 8/27/2018 9/17/2018 B687 9990000009 3 9/7/2018 9/28/2018 B023

Please use following table information to answer the exercises.SQL> DESC DEPARTMENTSName Null? Type----------------------------------------- -------- ----------------------------DEPARTMENT_ID NOT NULL NUMBER(4)DEPARTMENT_NAME NOT NULL VARCHAR2(30)MANAGER_ID NUMBER(6)LOCATION_ID NUMBER(4)     SQL> DESC EMPLOYEESName Null? Type----------------------------------------- -------- ----------------------------EMPLOYEE_ID NOT NULL NUMBER(6)FIRST_NAME VARCHAR2(20)LAST_NAME NOT NULL VARCHAR2(25)EMAIL NOT NULL VARCHAR2(25)PHONE_NUMBER VARCHAR2(20)HIRE_DATE NOT NULL DATEJOB_ID NOT NULL VARCHAR2(10)SALARY NUMBER(8,2)COMMISSION_PCT NUMBER(2,2)MANAGER_ID NUMBER(6)DEPARTMENT_ID NUMBER(4) 12. Display the last name, hire date, and day of the week on which the employee started. Label the columnDAY. Order the results by the week starting with Monday.

please use sql to answer the following question

Select four SQL datatypes. Explain what they are and when you would use them.

Based on the ERD below, write the SQL statement to change the job description of “Database Designer” to “Database Developer”. After completing this task examine the results with a select statement. (Hint: Use an Update Statement.)

QUESTION 2 Candidate keys Chosen as preferred way to identify a row All of these None of these O Uniquely identify a row in the table within which it resides O Enforce referential integrity