consider the database below and answer the query. pk refers to primary key and FK refers to foreign key.    Employee(Employee_id(PK), First_name, Last_name, Email, Phone_number, Hire_Date, Job_ID(FK) COmmision_pct, manager_id, department_id(FK))   Departments(Department_id(PK), dept_name, manager_id(FK), location_id)   Locations(Location_id(PK), street_address, postal_code, city,

Q: SQL allows a foreign-key dependency to refer to the same relation, as in the following example:…

A: Answer:-

Q: Employee_Id, First_Name, Last_Name, Email, Phone_Number, Hire_Date, Job_Id, Salary, Commission_Pct,…

A: a. To get the average salary and number of employees working in department 90, we can use the…

Q: Given the default schema of a database: Customers 123 Customerld ADC FirstName ADC LastName ADC City…

A: Answer: We need to write the given SQL command what will be return so we will see in the more…

Q: Refer to the given tables. Salesperson Salesperson Commission Year of Department Manager Number Name…

A: In order for a relation to be in the 2NF, it must be: Should not include partial dependency in 1NF.…

Q: The Car Maintenance team also wants to store the actual maintenance operations in the database. The…

A: DELETE CASCADE: - When we constitute a foreign key using this option, it deletes the referencing…

Q: Refer to the below listed database diagram and develop SQL a query to find the names of all the…

A: What is SQL: SQL is a standard language for accessing and manipulating databases. SQL stands for…

Q: write a query to drop all tables(Hint: make sure to consider foreign keys)

A: WE have to  write a query to drop all tables(Hint: make sure to consider foreign keys)

Q: What data types would you use for the attributes in this entity? How would you code a CREATE TABLE…

A: In a database management system (DBMS), an attribute is a piece of data that describes an entity.…

Q: SQL allows a foreign-key dependency to refer to the same relation, as in the following example:…

A: Structured Query Language (SQL) is used to manage relational databases and perform various…

Q: Hospital Doctor Patient District Patient doctor h_id Hospital_name Area d_id d name p_id p_name c_id…

A: Primary Key:         Primary Key in a table ensures that the primary key value are unique and…

Q: Consider a database table named "EMPLOYEES" with the following columns: E_EMPLOYEEID, E_FIRSTNAME ,…

A: Understand the Requirement:Identify the table: In this case, the table is named "EMPLOYEES."Identify…

Q: Please write the MySQL query for the following task: Find the first_name, last_name, employee_id,…

A: we can use the following MySQL query:

Q: You are querying a database that contains data about music. Each musical genre is given an ID…

A: SQL is short for Structured Query Language which is a language used to query a database to obtain…

Q: Consider the following relational schema and answer the following questions. Employee (Employee_Id,…

A: SQL (Structured Query Language) is used for managing and manipulating relational databases. SQL…

Q: Given the following database table data: Customer Table CustomerlD (text datatype and key field)…

A: The correct answer is given below with a proper explanation

Q: Consider the following relational schema and answer the following questions. Employee (Employee_Id,…

A: The SQL query is given below for the above given question:

Q: Using the World database, display the distinct districts that have more than 20 cities within them.…

A: To display the distinct districts that have more than 20 cities within them.   The query can be…