xplain Local Descriptor Table?
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- assume that a database has a table named Stock, with thefollowing columns:Column Name TypeTrading_Symbol nchar(10)Company_Name nchar(25)Num_Shares intPurchase_Price moneySelling_Price money Write a Select statement that returns the Trading_Symbol column and the Num_Shares column from every row in the table.What is map file and when it is created?Task 2: The Car Maintenance team also wants to store the actual maintenance operations in the database. The team wants to start with a table to store CAR_ID (CHAR(5)), MAINTENANCE_TYPE_ID (CHAR(5)) and MAINTENANCE_DUE (DATE) date for the operation. Create a new table named MAINTENANCES. The PRIMARY_KEY should be the combination of the three fields. The CAR_ID and MAINTENANCE_TYPE_ID should be foreign keys to their original tables. Cascade update and cascade delete the foreign keys. Create a new table to store maintenance operations Test Query DESCRIBE MAINTENANCES Expected Results Field Type Null Key Default Extra CAR_ID char(5) NO PRI NULL MAINTENANCE_TYPE_ID char(5) NO PRI NULL MAINTENANCE_DUE date NO PRI NULL
- Task 2: The Car Maintenance team also wants to store the actual maintenance operations in the database. The team wants to start with a table to store CAR_ID (CHAR(5)), MAINTENANCE_TYPE_ID (CHAR(5)) and MAINTENANCE_DUE (DATE) date for the operation. Create a new table named MAINTENANCES. The PRIMARY_KEY should be the combination of the three fields. The CAR_ID and MAINTENACNE_TYPE_ID should be foreign keys to their original tables. Cascade update and cascade delete the foreign keys. Answer in MYSQL pleaseCreate table statements (file name must be: 1_create_table.txt). Make sure you specify primary keys and foreign keys. Specifying “not null” constraint is optional. Specifying “on delete action” and “on update action” are optional.Create a view vLab3_xxx in the class database list the staff who have the highest salary in each of the branch city. You will need both Staff and Branch table. The output header should be (city, name, salary) where the name is "fname lname".
- "3,4,and 5 are answered" as per our policy we are only allowed to solve 3 subparts.kindly reupload rest of the question 3 create table CREATE TABLE table1 ( day varchar(255), client_code varchar(255), client_name varchar(255), team_ID varchar(255), member int, team_leader varchar(255), leader_wage int, total int); Step 2 4.insert data into table INSERT INTO table1 (day,client_code,client_name,team_ID,member,team_leader,leader_wage,total) VALUES ( 'monday','c4','aeliana gebahard','T3','6','jaymes merrickson','350','850'); INSERT INTO table1 (day,client_code,client_name,team_ID,member,team_leader,leader_wage,total) VALUES (' ','c10','alfher dareia','T1','6','geoffrey glover','250','750'); INSERT INTO table1 (day,client_code,client_name,team_ID,member,team_leader,leader_wage,total) VALUES ( ' ','c8','felina diodotus','T2','5','elmer victorson','300','700'); INSERT INTO table1 (day,client_code,client_name,team_ID,member,team_leader,leader_wage,total) VALUES ('…Population Database Compile and run CreateCityDB.java which will create a Java DB database named CityDB. The CityDB database will have a table named City, with the following columns: CityName & Population. Their Data Types: CHAR(50) Primary Key & 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, create an application that connects to the CityDB database and allows the user to select 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 average population of all the cities. Get the highest population. Get the lowest population. CreateCityDB.java import java.sql.*; /** This program creates the CityDB…Create an ADD TRIGGER. Explain what the trigger does. Test and show the related results of this trigger. Table 1: CREATE TABLE BSR_PASSENGER (PASSENGER_ID INT NOT NULL UNIQUE, FULL_NAME VARCHAR(30), COUNTRY VARCHAR(40), CITY VARCHAR (40), PRIMARY KEY (PASSENGER_ID)); Table 2: CREATE TABLE BSR_FLIGHT (FLIGHT_ID INT NOT NULL UNIQUE, AIRLINE_NAME VARCHAR(50), CREW_MEMBERS INT, PRIMARY KEY (FLIGHT_ID)); Table 3: CREATE TABLE BSR_BOOKING (BOOKING_ID INT NOT NULL UNIQUE AUTO_INCREMENT, PASSENGER_ID INT NOT NULL, FLIGHT_ID INT NOT NULL, COST DEC(6,3), PRIMARY KEY (BOOKING_ID), FOREIGN KEY (PASSENGER_ID) REFERENCES BSR_PASSENGER(PASSENGER_ID), FOREIGN KEY (FLIGHT_ID) REFERENCES BSR_FLIGHT(FLIGHT_ID));
- C sharp Table: Student (the headers are the field names in the Students table) StudentID Name Age Gender ProgramID 791 Stephanie Brown 19 Female BCS 236 Shannon Dawn 25 Female BA 618 Geoff Berg 24 Male ARET 256 Andrew Schilling 22 Male BSC 902 Gary Sang 23 Male DAAD Note: There is a StudentDataSet with a Student table, a StudentTableAdapter, a StudentBindingSource, and a StudentDataGridView control on the form.Note: There is an Average query, named Average, that returns the average age of the student from the Student table.Note: There is also Max query, named Highest, that returns the highest age of the student from the Student table.Write the code you would place in the AverageButton click event on your form to call the Average query and the Highest query and display in a DifferenceLabel, the difference between the highest age of a student and the average age.1) Add the following record to the OWNER table: INSERT INTO OWNER VALUES('SA100', 'Sam', 'Afyouni', '100 Hello St', 'Anytown', 'MA', '55555'); 2) Create the UPD_OWNER_LAST_NAMEprocedure to change the last name of the owner whose number is stored in I_OWNER_NUM (provided as a parameter) to the value currently found in I_LAST_NAME.
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