etrieves documents from MondoDB collection named WEB322 the 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 lastName make sure the _id field is NOT retrieved
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QUESTION 21
-
Code a chain of MongoDB methods that
- retrieves documents from MondoDB collection named WEB322
- the 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 lastName
- make sure the _id field is NOT retrieved
- sort the selected documents by lastName in ascending sequence
- store the result to an array named result
- assume the connection between the program and
database had already been established and the name of the database object is db
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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 dbOpen your text editor and create a new document named model.php model.php will contain functions that will connect to a database potentially return PDO statementobjects to the controller for processing. updateMessagesfunction updateMessages($id)This method will take a single parameter of id which is the saved id from the last or latest message displayed. It will conditionally select from the table “messages”, id, name, message, and time. The condition is that the field id is greater than the parameter for id. The return is the PDOStatement object with the row data from the query.Objective: To create a JSON for Population census with objects and arrays Scenario: DEF Census Company is maintaining database on the survey taken. Application sends the details of schemes in the form of JSON Help to create a JSON with the information provided. Name Datatype of value Country String State String YearOfSurvey Number TotalPopulation String AgeGroup Object AgeGroup- Object : Name Datatype of value 0-14 Array 15-24 Array 25-44 Array 45-64 Array Above65 Array Array : Name Datatype of value male Number female Number You can assume any data for the mentioned JSON structure, provided it is matching the specified datatype
- Population Database You will find a program named CreateCityDB.java in Starting Out with Java: Early Objects (6th Edition) Chapter 15 Source Code. Compile and run the program (SEE BELOW). The program will create a Java DB database named CityDB. The CityDB database will have a table named City, with the following columns: Column Name Data Type CityName CHAR (50) Primary Key Population DOUBLE The CityName column stores the name of a city, and the Population column stores the population of that city. After you run the CreateCityDB.java program, the City table will contain 20 rows with various cities and their populations. Next, write a JavaFX application called PopulationDemo that connects to the CityDB database and allows the user to click any of the following operations: Sort the list of cities by population, in ascending order. Sort the list of cities by population, in descending order. Sort the list of cities by name. Get the total population of all the cities. Get the…The SQLiteOpenHelper and SQLiteCursor classes are described, with a focus on how they may be used to perform create, read, update, and delete (CRUD) actions on a SQLite database.In java create an application to manage your data base information the database is already created in mysql tables, the tables are fill, So the user can use your database application user friendly Retrieve all data: Given a table name, retrieve all data from the table and present it to the user. Average: Given a table name and a column name, return the average of the column. Here the assumption is that the column type will be numeric (e.g., cost column). Insert: Given a table name, your program should show the column names of that table and ask the users to input new data to the table. In case of errors, your program should directly show the MySQL errors to the users. Assumption 1: Users will enter data according to the database constraints. Assumption 2: Users will input one record at a time. Delete: Given a table name, your program should show the column names of that table and ask the users to input data that they want to delete. Assumption 1: Users will enter data according to the…
- Develop a C++ program to connect to a MS Access database (“Student.accdb” – attached to this assignment) and use SQL commands to manipulate its records. You may use MS Access, SQLite or another DB engine and drivers. Scope The user will be given a menu to choose from the following options: Press (S) to select and display all students records Press (D) to delete a student by ID# Press (U) to update a student’s graduation year Press (I) to insert a new student Press (Q) to quit For user option# 1, first display the header and then display every record on a separate line. See example below Student ID First Name Last Name Major Graduation Year 1 Joe Doe Computer Science 2018 2 Emma Smith Electrical Engineering 2019 3 Juan Perez Marketing 2019 For user option#2, confirm back to the user whether the deletion was successful or the ID provided was not found in the students records. For user option#3, prompt the user to enter a student ID, validate if the student ID exists…The Save Transaction button depicted in the screen attached is used to save relevant data to the sales table and the salesdetails tables from the depicted schema. When this button is clicked it calls the saveTransaction() function that is within the PosDAO class, it passes to this function an ArrayList of salesdetails object, this list contains the data entered into the jTable which is the products and qty being sold.Write the saveTransaction function. You are to loop through the items and get the total sales, next you are to insert the current date and the total sales into the sales table. Reminder that the sales table SalesNumber field is set to AUTO-INCREMENT, hence the reason for only entering the total sales and current date in sales table.Write a program in JAVA to Create a table in a separate file should add an attribute to the table data in the file should insert data into table data file
- Section B- EXCEPTION HANDLING TASK 1 Write a PL/SQL block to retrieve employees from the ENEW table based on their salary. If there are multiple employees earning the same salary (i.e. returns more than one row), handle the exception with the appropriate handler and print the message "More than one employee with the same salary". If there are no employees earning that salary, handle the exception with the appropriate handler and display the message "No employees with this salary". If there is only one employee with this salary, then print that employee's name, hiredate and salary (predefined server exception problem).In this database we have users that can be two types students or instructors. They have groups and memberships. Any user can post and the post type can be video, photo or text. Here is the table structure: CREATE TABLE USER_ ( USER_ID INT NOT NULL AUTO_INCREMENT, CREATE_DATE DATE NOT NULL, PROF_DESC VARCHAR (100), PROF_PIC VARCHAR(40), LOCATION VARCHAR (40) NOT NULL, PRIMARY KEY (USER_ID) ); CREATE TABLE USER_INFO( USER_ID INT NOT NULL, SU_EMAIL CHAR(18), USER_FNAME VARCHAR(15), USER_LNAME VARCHAR (15), USER_DOB DATE, USER_GENDER CHAR(1), PRIMARY KEY (USER_ID), FOREIGN KEY (USER_ID) REFERENCES USER_(USER_ID) ON UPDATE CASCADE ); CREATE TABLE STUDENT ( SU_ID INT NOT NULL, USER_ID INT NOT NULL, YEAR_ VARCHAR (10), MAJOR VARCHAR (20), LOCATION VARCHAR (40) NOT NULL, PRIMARY KEY (SU_ID), FOREIGN KEY (USER_ID) REFERENCES USER_(USER_ID) ON UPDATE CASCADE ); CREATE TABLE INSTRUCTOR ( SU_ID INT NOT NULL, USER_ID INT NOT NULL, DEPARTMENT VARCHAR (40), INSTR_TYPE VARCHAR (40),…#Fill in comments to spec. import sqlite3from contextlib import closing from Objects import Player, Lineup conn = None def connect():global connif not conn:DB_FILE = "player_db.sqlite"conn = sqlite3.connect(DB_FILE)conn.row_factory = sqlite3.Row def close():if conn:conn.close() def get_players():return None #remove this line when code is added.# SQL statement to select all 7 fields for all players # Use a with statement to execute the query # Create a lineup object# use a loop to populate the lineup object with player objects# return the lineup object def get_player(playerID):return None #remove this line when code is added.# SQL statement to select all 7 fields for a player # Use a with statement to execute the query & return a player object if the player exists def add_player(player):return None #remove this line when code is added.# SQL statement to insert 6 fields for a player added to the table # Use a with statement to execute the query def delete_player(player):return None…