Hello, I need help with a data base question table1 Item ID, description, unit price, invoice ID, amount, processed table 2 invoice_id, article_id, quantity table 3 Invoice_ID, number,
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Hello, I need help with a data base question
table1
Item ID, description, unit price, invoice ID, amount, processed
table 2
invoice_id, article_id, quantity
table 3
Invoice_ID, number, date, customer_ID, paid
table 4
customer_ID, company_name, address, city, tax_code, VAT(iva) _number
Create the queries needed to perform the following tasks.
6) Calculation of the ratio between the maximum and minimum price for each item.
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- How do you create an index? How do you create a unique index? What is the difference between an index and a unique index?Review the data for the TRIP table in Figure 1-5 in Chapter 1 and then review the data types used to create the TRIP table in Figure 3-39. Suggest alternate data types for at least two fields that currently have the CHAR data type and at least two fields that currently have the DECIMAL data type. Create but do not execute the SQL command to create the TRIP table using these alternate data types.Task 6: The Car Maintenance team considered that the available maintenance tasks should also have the price information in the database. Alter the MAINTENANCE_TYPES table to include a new column named MAINTENANCE_PRICE of type FLOAT. Alter the MAINTENANCE_TYPES table to include pricing information.
- The team wants to track potential list of users who may have forgotten their items on the cars. Therefore, you need to return USER_FIRST_NAME, USER_LAST_NAME, TRAVEL_START_TIME, TRAVEL_END_TIME information from the USERS and TRAVELS tables connected inside a JOIN statement by the USING function and USER_ID fieldThe following fields are presented in the table: Member Last Name, MemberFirstName, Street, City, State, ZipCode and MemberFee. The table contains 75,000 documents. How would you build indexes for the table and why would you create these indexes?Use the following table to answer the questions below: Table name: Customers Column Name Role Data Type Length Constraint customerID stores the ID of a Char 5 Primary key customer custFName stores the first name of a Varchar2 35 Cannot be null customer custLName Stores the last name of a Varchar2 35 Cannot be null customer custGender Store the gender of a Char 1 It should be M customer or 'F' custDOB Stores the date of birth of Date a customer custIncome Store the income of a Number customer a. Write in SQL a command that creates the table Customers according to the above description b. Write in SQL a statement that adds a new column named accountID of type Char(8). This column should be defined as a foreign key that relates the table Customers to the table Account c. Write in SQL a command that deletes the customers whose date of birth is after 22-Dec-1990 d. Write a SQL query that displays the number of customers who born on the 16th day of a month e. Write in SQL a query that…
- artists: artist_id, first_name, last_name, contact_no, Profession ,birth_date ,address awards: awards_id, movie_id, person_id, category movie_cast: id, movie_id, person_id, category movies: movie_id, title, genre, gross, Distributor, release_date movies_ratings: rating_id, movie_id, person_id, number_of_stars 1. Write a query in SQL to list the following information of the artists in movie industry. Limit this information to only 5 artists. Sort the information by age descending order. Full name : first name and last name separated by space Age: Current age Address: State that he resides Contact number: Phone number. 2. Write a query in SQL to find the full name of the "Actors" who appeared in the movie titled Star Wars (using JOIN ) 3. Write a SQL query to find the movie Title that has received Lowest rating from reviewers, but whose actors have received an award for their contribution in movie. Output:Fantastic Beasts and Where to Find Them 4. Write a SQL query that display the list…Use the following table to answer the question below: Table name: Customers Column Name Role Data Type Length Constraint customerID stores the ID of a customer Char 5 Primary key custFName stores the first name of a customer Varchar2 35 Cannot be null custLName Stores the last name of a customer Varchar2 35 Cannot be null custGender Store the gender of a customer Char 1 It should be ‘M’ or ‘F’ custDOB Stores the date of birth of a customer Date custIncome Store the income of a customer Number 4 Write a SQL query that displays the number of customers who born on the 16th day of a month . Write in SQL a query that displays the ids of the customers who have the highest income . Create a view named ‘customerDetails’ to hold all the details of customers whose first names start with ‘S’ and their incomes are between 500 and 1000 Omani Rials .You are working with a database table that contains employee data. The table includes columns about employee location such as city, state, country, and postal_code. You want to retrieve the first 3 characters of each postal code. You decide to use the SUBSTR function to retrieve the first 3 characters of each postal code, and use the AS command to store the result in a new column called new_postal_code. You write the SQL query below. Add a statement to your SQL query that will retrieve the first 3 characters of each postal code and store the result in a new column as new_postal_code. NOTE: The three dots (...) indicate where to add the statement. 1 2 3 4 5 6 7 SELECT employee_id, ... FROM employee ORDER BY postal_code RunReset What employee ID number appears in row 5 of your query result?
- Use the following table to answer the questions below: Table name: Customers Column Name Role Data Type Length Constraint customerID stores the ID of a customer Char 5 Primary key custFName stores the first name of a customer Varchar2 35 Cannot be null custLName Stores the last name of a customer Varchar2 35 Cannot be null custGender Store the gender of a customer Char 1 It should be ‘M’ or ‘F’ custDOB Stores the date of birth of a customer Date custIncome Store the income of a customer Number 4 Write in SQL a command that creates the table Customers according to the above description (2 marks). Write in SQL a statement that adds a new column named accountID of type Char(8). This column should be defined as a foreign key that relates the table Customers to the table Account (1.5 marks). Write in SQL a command that deletes the customers whose date of birth is after 22-Dec-1990 (1.5 Marks).…Use the following table to answer the questions below: Table name: Customers Column Name Role Data Type Length Constraint customerID stores the ID of a Char 5 Primary key customer custFName stores the first name of a Varchar2 35 Cannot be null customer custLName Stores the last name of a Varchar2 35 Cannot be null customer custGender Store the gender of a Char 1 It should be M customer or 'F' custDOB Stores the date of birth of Date a customer custIncome Store the income of a Number customer d. Write a SQL query that displays the number of customers who born on the 16th day of a month e. Write in SQL a query that displays the ids of the customers who have the highest income f. Create a view named 'customerDetails' to hold all the details of customers whose first names start with 'S' and their incomes are between 500 and 1000 Omani Rialscreate table branch(branch_name varchar(30) primary key, branch_city varchar(30), assets varchar(60) );create table customer(ID_number integer primary key, customer_name varchar(30), customer_street varchar(40), customer_city varchar(40) );create table loan(loan_number integer primary key, branch_name varchar(30),amount integer, foreign key(branch_name) references branch(branch_name) );create table borrower(ID_number integer primary key, loan_number integer , foreign key(loan_number) references loan(loan_number) );create table account(account_number integer primary key, branch_name varchar(30), balance integer , foreign key(branch_name)references branch(branch_name) );create table depositor(ID_number integer primary key, account_number int , foreign key(account_number) references account(account_number) ); Consider the bank database schema given in question (2). Write a SQL trigger to carryout the following action: If an account is deleted, then write a trigger to delete thedependent…
