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- Below is a schema for an HR database:employee(empid, fname, lname, managerid, departmentid, employee_rank)It's an employee table, which has employee id, first name, last name, manager id (which is an employee id), department id, and employee_rank, such as VP, CEO, SVP, etc.Using SQL, answer this question (write a SQL query that answers this question) [tip: use a recursive query]. 11. For employee 42, find the path-of-managers directly to the CEO?Let's wa(k through a review of basic SQL syntax, using as an example the database that was mentionedearlier. This database has the following simple structure(* indicates a primary key):Courses: CourseID*, CourseName, TeacherIDTeachers: TeacherID*, TeacherNameStudents; StudentID*, StudentNameStudentCourses: CourseID*, StudentID*Using the above table, implement the following queries.Query 1: Student Enrollment Query 2: Teacher Class SizeConsider the following sales relational database schema for sales. Item (ItemNo: integer, ItemName:string, type:string) Customer (CID:integer, Cname:string, gender: character{ ’F’-Female, ‘M’-Male}) Sales (SalesID:integer, ItemNo:ineteger, CID:intger, price:double) Write the following queries in SQL. Display ItemName and type for all items bought by female customers. Display SalesID and ItemNo of the item with the lowest price.
- PART B Consider the college database you implemented in the image provided and answer the following questions. i. Write SQL statements to populate the relevant tables with the following data Studno givenName familyName faculty hons year courseno equipmentused subjectsubject 220123 Angel Matheaus FCI Computer Science 2 CSC101 laptop java 227456 Michael Jackson ACC Accounting 3 ACC510 calculator Statistics 223546 Joy Willian MGT Management 1 MGT305 project leadership Name roomno course Andrea Kulima 709 ACC510 Princess Bukohwo FCI 6 CSI101 Peter Jones 201 MGT305 Thandeka Pheto OB 12 CSI101 All staff (appraisees) are appraised by Thandeka Pheto. ii. Write an SQL statement to change Thandeka Pheto’s room number to “PH506”iii. Joy Willian decided to transfer to another college, write SQL statement to remove her details from the college’s database. iv. Write an SQL query to show all students in year 2 of their studies v. Write an SQL query to list all…You are working with a database table that contains customer data. The table includes columns about customer location such as city, state, country, and postal_code. You want to check for postal codes that are greater than 7 characters long. You write the SQL query below. Add a LENGTH function that will return any postal codes that are greater than 7 characters long.1. Write a PL/SQL program using an explicit cursor that displays all patients PLCO_ID numbers from the colo_proc_data table on the screen if the patients’ procedure is biopsy, the procedure is staging, interval status of linked cancer is never screened, the procedure type is invasive Scopes, biopsies, & surgeries, the procedure type is Lymphadenectomy/Lymph Node Sampling, and the procedure result is abnormal, confirmed metastasis.
- Computer engineering labApexSOQL - salesforce object query languageWhy i am getting this error in the below queryHere is the query -List<Prod2> productList = [Select Id, Name, Parent_Product__c, IsActive, Description, Account__c, (Select Id, Product2Id, Quantity From OrderItem) From Prod2 Where Account__c = 'XYZ'];ERROR at Row:3:Column:70I am not able to understand the relation between the OrderItem Object from the above query.Please resolve the error and provided me solution so i can solve it.Solve in Apexcan you help me iwth these two queries in mySQL. Write a SQL statement to create a table job_history including columns employee_id, start_date, end_date, job_id and department_id and make sure that, the employee_id column does not contain any duplicate value at the time of insertion and the foreign key column job_id contain only those values which are exists in the jobs table. Write a SQL statement to create a table employees including columns employee_id, first_name, last_name, email, phone_number hire_date, job_id, salary, commission, manager_id and department_id and make sure that, the employee_id column does not contain any duplicate value at the time of insertion and the foreign key columns combined by department_id and manager_id columns contain only those unique combination values, which combinations are exists in the departments table.When writing queries in a programming language, why should we avoid creating a query by concatenating strings and instead use prepared statements or stored procedures in defense against SQL injection? a. concatenating strings helps prevent sql injection b. prepared statements or stored procedures help prevent the user/hacker from deliberately modifying the query by injecting sql instructions in the input values c. prepared statements prevent the query from taking as long to execute d. prepared statements enable the developer to just supply values without injecting sql
- 51. The given SQL statement is intended to either (1) list the customer numbers, customers names, and headquarter cities of customers headquartered in Los Angeles or (2) satisfy the two conditions of having a customer number higher than 1000 and being headquartered in Denver. SELECT CUSTNUM, CUSTNAME, HQCITY FROM CUSTOMER WHERE HQCITY= 'Los Angeles" Which set of lines should be added to the end of the statement to make the statement work as intended? A: (CUSTNUM>1000 AND HQCITY-'Denver'); B: AND (CUSTNUM>1000 AND HQCITY='Denver*); C:OR CUSTNUM>1000 OR HQCITY='Denver": D:OR (CUSTNUM> 1000 AND HQCITY='Denver*);ANSWER ONLY QUESTION 2 SQL 1. Use appropriate clauses and filters to run the query with minimum time complexity. 2. Try to avoid running the queries on unnecessary rows and columns. 3. Share the queries along with a brief description of the code in a python file, so that the results are reproducible. Q1: Write a query to find the doctors working in a company having more ratings than their supervisors EMPLOYEES RATING TABLE employee id employee name rating senior id designation 1 george 9 3 doctor 2 micheal 8 4 doctor 3 mary 6 null supervisor 4 steve 9 null supervisor For the above table GEORGE…J SHORTAND NOTATION FOR RELATIONAL SQL TABLES Notation Example Meaning Underlined A or A, B The attribute(s) is (are) a primary key Superscript name of relation AR or AR, BR The attribute(s) is (are) a foreign key referencing relation R As an example, the schema R(A, B, C, D, ES) S(F, G, H) corresponds to the following SQL tables: CREATE TABLE R ( A <any SQL type>, B <any SQL type>, C <any SQL type>, D <any SQL type>, E <any SQL type>, PRIMARY KEY(A), FOREIGN KEY (E) REFERENCES S(F) ); CREATE TABLE S ( F <any SQL type>, G <any SQL type>, H <any SQL type>, PRIMARY KEY(F)) EXERCISE Consider the following relational schema, representing five relations describing shopping transactions and information about credit cards generating them [the used notation is explained above]. SHOPPINGTRANSACTION (TransId, Date, Amount, Currency, ExchangeRate, CardNbrCREDITCARD, StoreIdSTORE) CREDITCARD (CardNbr, CardTypeCARDTYPE, CardOwnerOWNER, ExpDate, Limit)…