Show the list of courses numbers that are taken at least once by students. The course should appear once even if the course is taken multiple times.

Q: create table emp ( eid number(7), fname char(20), lname char(20), salary   number, primary key…

A: Since you have not provided the database name to write the SQL code so I am using MySQL database to…

Q: List all book titles that have never been borrowed by any borrower.

A: The SQL program for the given problem is as follows: use demo;Create table Book(ISBN varchar(30) Not…

Q: The Book table has the following columns: ID Title Author Genre Year Price Complete the SELECT…

A: The question is asking for a SQL query that will return each genre and the total number of books in…

Q: Show all female’s first names and their salary.  Show the branchno that has a supervisor whose…

A: Relational database is a type of database which stores and provides the access to data which are…

Q: 9. Find the total amount of tax paid by resident of NJ Hint: The tax cost stored in tax_amount…

A: Inner join is used to join two tables. Tax_amount column is given , to find sum value of a column.…

Q: Show students’ first name and last name, the course numbers the student took (don’t include…

A: Data is coming from 3 tables . So apply inner join on 3 tables with joining condition.  student…

Q: For every completed or 'open service request for janitorial work', list the condo id, description,…

A: The querry has given

Q: Display Customer name (concatenate First Name and Last Name with a space between) and total number…

A: In order to concatenate the 'FNAME' with 'LNAME' use the '+' sign to combine them.  Use the SELECT…

Q: C) Which employees earn less salary than the average salary for the consultants who perform the same…

A: According to the information given:- We have to consider the instruction to write queries on the…

Q: List all the course information and the students who took the courses. If the course has no student,…

A: The question has been answered in step2

Q: Item Number (Item Name) In this case, the date of supply is 04 VENDOR Vendor supply chain Authors'…

A: Attribute (Simple): Simple qualities are ones that cannot be further subdivided. For example, in the…

Basic SQL Queries

Structured Query Language is the full form of SQL. It is a high-level language used to communicate with a relational database. It is used for creating, storing and accessing contents of a relational database. SQL is used to write the queries which are executed using database engines like Oracle, SQL Server and so forth.