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- Code a chain of MongoDB methods that retrieves documents from MondoDB collection named WEB322the only documents that are selected are the ones with value 211 in the semester field the only fields of the selected documents that are retrieved are firstName and lastNamemake sure the _id field is NOT retrievedsort the selected documents by lastName in ascending sequencestore the result to an array named resultassume the connection between the program and database had already been established and the name of the database object is dbCreate a database named cis224 with an addresses table with the following : AddressNo (auto-increment, primary key) First (25 characters, not null) Last (30 characters, not null) Street (100 characters, not null) City (25 characters, not null) State (2 characters, not null) Zip (10 characters, not null) The ecpi_user should have access to the database. Add at least 2 records to the database, one including your name. Create a PHP web application that does the following: Displays a table with all fields in the database Provides the ability to Add new addresses Provides the ability to Update existing addresses Provides the ability to Delete existing addressesWrite a script that implements the following design in a database named my_web_db: users downloads products product_id INT O product_name VARCHAR(45) user_id INT download_id INT email_address VARCHAR(100) user_id INT O first_name VARCHAR(45) KO download_date DATETIME Indexes Olast_name VARCHAR(45) O filename VARCHAR (50) Indexes O product_id INT Indexes In the Downloads table, the user_id and product_id columns are the foreign keys. Include a statement to drop the database if it already exists. Include statements to create and select the database. Include any indexes that you think are necessary. Specify the utf8mb4 character set for all tables. Specify the InnoDB storage engine for all tables.
- An in-memory database (IMDB) is a database management system that stores the entire database in _______. a. random access memory b. read-only memory c. distributed servers d. virtual memoryUse NetBeans as the default IDE tools in creating Java programming language Write a Java program that will register some student record to the database given the following attributes. Student ID: xxxx-xxxxx Name (First Name, Middle Name, Last Name) Course Contact Number Ageimport sqlite3 from sqlite3 import Error # Creates connection to sqlite in-memory database def create_connection(): """ Create a connection to in-memory database :return: Connection object """ try: conn = sqlite3.connect(":memory:") return conn except Error as e: print(e) # YOUR CODE HERE # Use sqlite3.connect(":memory:") to create connection object return conn # query to create the table table_sql = """ CREATE TABLE Horses ( id integer PRIMARY KEY NOT NULL, name text, breed text, height real, birthday text ); """ # query to insert data into the table ins_sql = """INSERT INTO Horses VALUES(1,'Babe','Quarter Horse',15.3,'2015-02-10'); """ # query to fetch all data from the table fetch_sql = """SELECT * FROM Horses;""" # creating db connection conn = create_connection() # fetching a cursor from the connection c = conn.cursor() # executing statement to create table c.execute(table_sql) # executing statement to…
- A key for this database is {Departure Time}. Enter a different key for the database. Airline Flight Number Gate Destination Departure Time FlyRight 221 34 Denver 08:27 JetGreen 222 13 Anchorage 08:43 JetGreen 199 22 Honolulu 08:46 JetGreen 322 34 Anchorage 09:36 FlyRight 122 33 Honolulu 09:45 FlyRight 323 22 Detroit 09:50 FlyRight 222 33 Denver 09:55 Key: { Ex: GateIn database refactoring, the greater the coupling, the harder it is to refactor. True FalseAn index file is always larger than the original database file because the index file needs to store an additional pointer to each record. true or False?
- Create a user etec224. (Screenshot 1) Create a database Bank. (Screenshot 2) Grant etec224 privileges to Bank(Screenshot 3) As etec 224, create a table customers with the following structure. (Screenshot 4) CustomerID int(12) Primary Key and not null AccountNo int(12) FirstName varchar(15) not null LastName varchar(15) not null Birthday datetime Balance double(10,2) use a command to describe the table(Screenshot 5) insert 3 customers randomly to the above table(Screenshot 6) show all the contents of the table. (Screenshot 7) Were you able to complete the commands? True FalseCreate a new database (named MyUniversity) Student (sid: integer, sname: string(100 chars), GPA: real, dateOfBirth: date, Did: integer, FirstYear: integer) Department (did: integer, dname: string(30 chars), capacity: integer) Course (cid: integer, cname: string(50 chars), credit: integer) Enroll (studentID: integer, courseID: integer, departmentID: integer, enrollmentDate: date, finalGrade: real) studentID, courseID, and departmentID in Enroll are foreign keys referencing the primary keys of the student, course, and department relations, respectively. Did in Student is a foreign key referencing the primary key of the department relation. Using SQL create these relations under the MyUniversity database. Place the constraints (e.g., default values, check, primary keys) you find appropriate:Create a new database (named MyUniversity) Student (sid: integer, sname: string(100 chars), GPA: real, dateOfBirth: date, Did: integer, FirstYear: integer) Department (did: integer, dname: string(30 chars), capacity: integer) Course (cid: integer, cname: string(50 chars), credit: integer) Enroll (studentID: integer, courseID: integer, departmentID: integer, enrollmentDate: date, finalGrade: real) studentID, courseID, and departmentID in Enroll are foreign keys referencing the primary keys of the student, course, and department relations, respectively. Did in Student is a foreign key referencing the primary key of the department relation. Using SQL, insert (random but meaningful) data records in the above tables. Create at least four different courses that include Operating Systems (3 credit hours), Data Bases (4 credithours), and Marketing (5 credit hours) courses – consider one more course. Create three departments that include a Computer Science department and a Business department…