(Total 12 pts)Given the database tables above, use SQL commands(queries) to answer the following questions: a: (4 pts) Display all employees first names, last names and salaries in department 5. b: (4 pts) Display the total number of hours the employess worked on project 30. (1 pla) Display Franklin Wond's debarile c. (4 pts) Display Franklin Wong's dependents' names
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- In what circumstances does it make sense to assume that two select statements from the same database are consistent with one another?Create SQL statements for all character data types.Under what circumstances would it be reasonable to assume that two select statements from the same database are consistent with one another?
- this is SQL.Under what conditions is it permissible to make the assertion that two select statements taken from the same table both comply with the requirements of the union?Can you Write the SQL statements to do the following please : 1. Display the artist's name from the Artist table in uppercase.2. Display the person's Key, First Name, Last Name and Area Code (first 3 digits of the phone number) from the Person table and label the output as such. 3. Display the current date and five days from that date.4. Display the difference between the current date and the PurchaseDate of the Inventory.5. Display the day of the week, in words, on which the Purchases were place. (Hint: Use datepart dw.)6. Display the minimum, maximum, sum, average, count fields, count records for the SaleDetailPrice from the SaleDetail table. Appropriately label the output.7. Display the count of phone numbers in the Person table.8. Display the record count of the Person table.
- a) Find names and surnames of professors who teach a course in the "Biology" program: π(first_name, last_name)(σ(course_name = "Biology")(Course ⨝ Professor)) b) Find the student IDs and names of students who have not taken any exam (from any course): π(student_id, first_name, last_name)(Student - π(student_id)(Exam)) c) Find student IDs of students who have passed every exam from the "Data Science" program: π(student_id)(Student ⨝ (σ(programme = "Data Science")(Course) ⨝ (Student.student_id = Exam.student_id) ⨝ (Exam.grade >= 5))) d) Find the course IDs and names of courses that have been passed by at least two different students: π(course_id, course_name)(Course ⨝ Exam) ÷ ρ(count(students_passed), count(students_passed)(Course ⨝ Exam)) do these solutions fulfil these requirements 2. Use RELATIONAL ALGEBRA to write the following queries:a) Find names and surnames of professors, who teach a course in "Biology" programmeb) Find the student IDs and names of students who have not…Write a SQL statement to get the list of all the law firms from thedatabase in alphabetical order by firm name. Include all thecolumns from the LawFirm table.Write a SQL statement to get the list of all the law firms with aname that contains the letter Z. Include all fields from the LawFirmtable.Write a SQL statement to get the list of all the lawyers, showingonly the name and surname of the lawyer, and the name of theirfirm. What is the difference between the WHERE and HAVING clauses in SQLstatements? What is the purpose of an index in a SQL database?Write a SQL statement that display the emp id , dep id, dep name Output show
- Design the SQL-statements that are used as a basis tocreate the original reports and other queries that includethe following (at least):- A SELECT using an inequality- A SELECT using LIKE on a text field- A SELECT on a DATE column- A query using GROUP BY- A query using HAVING- A query using ORDER BY- A query using a subquery- A query using a correlated subquery- A query involving COUNT(*)- A query involving another aggregate function - A selective DELETE- A selective UPDATE- Delete the salesman who has the highest salary among all salesmenWhy would you assume that two select statements from the same database are consistent?