Q2. By giving an example, define "External Schema" and "User View"
Q: advantages
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- branch(branchhame, branch+citysassets} customer (HD, Customer name, customer street, customer city) loan loan number branch_name, amounty borrower(ID; loan_number account (account_number, branch name, balance)e depositor (HDs account number)- Figure le Consider the bank database in Figure 1, where the primary keys are underlined. Each branch might have many loans or accounts, associated with borrowers or depositors, respectively. Construct the following SQL queries for this relational database. 1. Find the name of each branch that has at least one customer who has an account in the bank and who lives in the "Harrison" city. Make sure each branch name only appears once. 2. Find the ID of each customer who lives on the same street and in the same city as customer "12345". (1) Please use "tuple variables". e (2) Please use "derived relations" or “with". 3. Find the ID of each customer of the bank who has an account but not a loan. 4. Find the total sum of all loan amounts for each branch…Apply these clauses to your database and get results. (Write query and provide screenshot of implementation)vi) Order By vii) View Please answer everything. I put this question twice, however there are seven sections. Please solve four.Discussion Topic This week we are learning about Functions, Procedures, and ETL. Reflect on the concepts you have been introduced in the learning activities in the module. Then respond to the prompt(s) below. Topic 1: Briefly explain how you would choose whether to use a user-defined functions (UDFS) or a stored procedure. Topic 2: Briefly describe challenges you may encounter when attempting to integrate data from multiple databases or systems.
- Based on this EER diagram, which of the following statements are incorrect? a. A collection may include no article b. An author may not write a book or contribute in an article c. A book or article must have an author d. An article may be part of more than one collectionQ3) consider you have the Library database with the following relations, where the primary keys are underlined: Book (bookID, name, auther, No.-of-pages, section-name, category) Section(section-name, section-admin, no-of-books, library-code) Library(library-name, address, no-of-sections, manager-name, library-code, country)Database Schema: branch ( branch_name, branch_city, assets ) customer ( ID, customer_name, customer_street, customer_city ) loan ( loan_number, branch_name, amount ) borrower ( ID, loan_number ) account ( account_number, branch_name, balance ) depositor ( ID, account_number ) Write a (postgresql) "trigger function" and "create a trigger" to carry out the following action: On delete of an account, for each customer-owner of the account, check if the owner has any remaining accounts, and if she does not, delete her from the depositor relation.
- "6.1,6.2,and 6.1 are answered" **As per Bartleby guidelines, solving the first 3 sub-parts as the question contains many parts and the required parts to be answered is not mentioned. It will involve the below steps: Converting ERD to relational schema The database will need to create below tables: **Primary key is bold and underlined, Foreign key is italic Patient(Pat_ID, Pat_Name, Pat_Age, Pat_Gender) Doctor(Doc_ID, DOc_Name, Doc_EmployDate, Prc_ID) Consultation(Doc_ID, Pat_ID, Con_Date) Practice(Prc_ID, Prc_Name, Prc_YearEstablished, Prc_Province) 6.1 Create tables in SQL Below is the script to create the tables with attributes and foreign key constraints: //Script will create the database named TrueHealth and then populate the tables: create database trueHealth;use truehealth; CREATE TABLE Patient(Pat_ID CHAR(4) primary key, Pat_Name varchar(50), Pat_Age int, Pat_Gender varchar(10)); CREATE TABLE Practice(Prc_ID int primary key, Prc_Name varchar(50),…10. Sometimes logic for a query can be quite complex. It is possible to produce the desired outcomes through the use of subqueries, inline views, and UNION-type statements. For those methods, the transitional results are not saved in the database but are directly used within the query. This can lead to achievement issues, particularly when the transitional results have a huge number of Explain. a. columns b. rows c. reports d. databases(question of Database design) A column is considered as a record by a database. 1.) True 2.) False
- Description of Each request has its own object.b. Directions versusc. Model-View-ControllerSecond normal form (2NF) states which of the following? All fields must contain single values only. Part of the primary key may not determine a non-key field. A non-key field may not determine a non-key field. In an all-key table, part of the key can determine multiple values of, at most, one other field.Please write in plain text format. Please dont copy the one that is already done! 1. ( For the Cities database, discuss one problem with either thecorrectness of the data or what can be easily done with the data that mightoccur if each of the following changes were made:• The state attribute of the City table was allowed to be null• The County table was merged into the State table by removing the Countytable and including a counties column in the State table with the names ofthe counties, plus a websites column in the State table with the websitesfor each county. The county column of the City table would just be thename of the county.2. Normalization The total set of five attributes is: {name, state, district, bill, vote}. This is forvotes of members of the House of Representatives on the bills that come up for avote. The functional dependencies that hold are:◦ {name} → {state, district}◦ {billNum, name} → {vote}• Now convert the above into Third Normal Form. Indicate all primary…