Hello- I have an entity class -Entity -Table(name - -employees-) pub.pdf
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Hello, I have an entity class @Entity @Table(name = "employees") public class Employee { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String name; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "manager_id") private Employee manager; // getters and setters } It has a self referencing (hierarchal) and I have a repository to return the parents(managers) and the children(employees) under them. public interface EmployeeRepository extends JpaRepository<Employee, Long> { @Query(nativeQuery = true, value = "WITH RECURSIVE manager_tree(id, name) AS (" + " SELECT id, name " + " FROM employees " + " WHERE manager_id IS NULL " + "UNION ALL " + " SELECT e.id, e.name " + " FROM employees e " + " JOIN manager_tree mt ON mt.id = e.manager_id " + ") " + "SELECT * FROM manager_tree") List<Employee> findTopLevelManagers(); } I want this query to be written using Spring JPA (native queries are not allowed), so could any expert help me by rewrite the query using Spring JPA (native queries are not allowed) and the manager of the managers their id is 1 not null ( WHERE manager_id IS NULL ) so I hope the expert change this line also..
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For the questions below, use the W3Schools customer orders database. You need to submit
thoroughly tested SQL statements. For your convenience and reference, relevant data model is
attached as a PDF document with the assignment in the Blackboard. Name of this document is
\"Relationship diagram for W3schools order pdf.\" 1) Write a query to show Customers\' Country
wise sales totals. Your query should show Customers\' Country name and the total sale value for
that Country 2) Write a query to show Product wise sales totals. Your query should Product
name and the total sale value for that Product. 3) Write a query to show the number of orders for
each shipper. Your query should show shipper name and the count of orders with the shipper. 4)
Write a query to show number of products in each product category. Your query should show
Category name and number of products in that category 5) Write a query that shows Customers\'
country wise customer count, and order count. Your query should show country name, total
number of customers from that country, and total number of orders from the customers of that
country 6) Write a query that shows the number of products supplied by each Supplier. Your
query should show Country name, supplier name and the count of products supplied by that
supplier. Note: Sale Price Orderdetails.Quantity Products.price (see an example in the class
slides deck) W3SCHOOLS SQL is located at http://www.w3schools.com/sql/default.asp
(Preferred browser is Chrome). On this page you will find a button called \"Try it yourself\".
Click on that button. You will be redirected to a page where you see a list of tables on the right
side of the page. It is highly recommended to click \'Restore Database\' button on this page
during every session. The page contains a box where you can type in an SQL statement
involving the listed tables. You type in your SQL statement in that box and click on \"Run
SQL\'\' button. The results will be displayed if your SQL statement is syntactically correct.
Solution
1. SELECT Customers.Country, SUM(OrderDetails.Quantity * Products.Price) AS Total_Sale
FROM Customers
LEFT JOIN Orders ON Customers.CustomerID=Orders.CustomerID
LEFT JOIN OrderDetails ON Orders.OrderId=OrderDetails.OrderId
LEFT JOIN Products ON OrderDetails.ProductId=Products.ProductId
Group BY Customers.Country;
2. SELECT Products.ProductName, SUM(OrderDetails.Quantity * Products.Price) AS
Total_Sale FROM Customers
LEFT JOIN Orders ON Customers.CustomerID=Orders.CustomerID
LEFT JOIN OrderDetails ON Orders.OrderId=OrderDetails.OrderId
LEFT JOIN Products ON OrderDetails.ProductId=Products.ProductId
Group BY Products.ProductName;
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country 6) Write a query that shows the number of products supplied by each Supplier. Your
query should show Country name, supplier name and the count of products supplied by that
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slides deck) W3SCHOOLS SQL is located at http://www.w3schools.com/sql/default.asp
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involving the listed tables. You type in your SQL statement in that box and click on \"Run
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FROM Customers
LEFT JOIN Orders ON Customers.CustomerID=Orders.CustomerID
LEFT JOIN OrderDetails ON Orders.OrderId=OrderDetails.OrderId
LEFT JOIN Products ON OrderDetails.ProductId=Products.ProductId
Group BY Customers.Country;
2. SELECT Products.ProductName, SUM(OrderDetails.Quantity * Products.Price) AS
Total_Sale FROM Customers
LEFT JOIN Orders ON Customers.CustomerID=Orders.CustomerID
LEFT JOIN OrderDetails ON Orders.OrderId=OrderDetails.OrderId
LEFT JOIN Products ON OrderDetails.ProductId=Products.ProductId
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Well, I think I did a semi-ok job; the code doesn\'t run and I have no idea why. Can you please
help. Platform: C++
========== C++ CODE ============
#include
#include
#include
#include
#include //must have to use system (\"pause\" );
//#include \"personType.h\"
using namespace std;
const int MAX_EMPLOYEES = 50;
//----------------------------------
class employeeType{ //:public personType
private:
long empID;
string first;
string last;
char gender;
double payrate;
string jobRole;
int years;
public:
virtual void programmer_info() const=0;
//Function to output employee\'s data
virtual double cutBacks(employeeType let[], int listsize) const=0;
//Function to calculate and return the wages.
//Postcondition: Pay is calculated and returned
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cantidades de la lista.
//Function to set the salary. /Postcondition: personId = id
long seqSearch(employeeType let[], int listLength, int searchItem)const;
//Function to retrieve the id. /Postcondition: returns personID
employeeType (long id = 0, string first = \"\", string last = \"\", char gender = \"\",
double payrate = 0, string jobRole = \"\",int years = 0);
//Ibefore it was: userinput();
//Constructor with parameters //Sets the first name, last name, payRate, and
//hoursWorked according to the parameters. If no value is specified, the default
//values are assumed. //Postcondition: firstName = first;
///==============================================================
void getData(ifstream& inFile, class employeeType let[], int& listSize);
void printOne ( employeeType one);
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cantidades de la lista.
void selectionSort( employeeType let[], int length);
void printList(employeeType let[], int listSize);
employeeType getOne ( ifstream& dataIn );
};
///===============================================================
void employeeType::yourFired(long id)
{
empID = id;
}
long employeeType::seqSearch() const
{
return empID;
}
employeeType::employeeType(long id, string first, string last, char gender,
double, string jobRole,int years)
: personType(first, last)
{
empID = id;
}
//----------------------------------
int main ()
{
int number; // number of employees in the file
int id;
char choice;
class employeeType [MAX_EMPLOYEES], newrecord;
ifstream dataFile;
dataFile.open ( \"newEmployees.txt\");
if (!dataFile){
cout << \"\ Error with input file!!\ \ \";
//system (\"pause\"); // must #include
return 1;
}
getData (dataFile, employeeType, number);
cout < to be used
/// TASK 3 =======================================================
for(int i =0; i<3 ; i++){ //calling hireOne 3 times, you can insert 3 new employees on a roll
hireOne(employeeType, number); // the list increases by up to 3 new records each time
}
cout << \"After hiring employees, new list: \ \"<> id;
your.
define a class name Employee whose objects are records for employee..pdf
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{
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{
Scanner keyboard = new Scanner(System.in);
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do // repeat if user says \'yes\'
{
// Test the nine constructors (uses writeOutput method)
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e1.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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e2.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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System.out.println(\"Constructor with name & salary :\");
e3.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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e4.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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System.out.println(\"Constructor with name and ssn:\");
e5.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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System.out.println(\"Constructor with name, salary & hire date:\");
e6.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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System.out.println(\"Constructor with name, salary & ssn:\");
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System.out.println();
System.out.println(\"===============================\");
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System.out.println(\"Constructor with name, hire date & ssn:\");
e8.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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e9.writeOutput();
System.out.println();
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// change all
System.out.println(\"Before:\");
e9.writeOutput();
System.out.println();
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========== C++ CODE ============
#include
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//#include \"personType.h\"
using namespace std;
const int MAX_EMPLOYEES = 50;
//----------------------------------
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private:
long empID;
string first;
string last;
char gender;
double payrate;
string jobRole;
int years;
public:
virtual void programmer_info() const=0;
//Function to output employee\'s data
virtual double cutBacks(employeeType let[], int listsize) const=0;
//Function to calculate and return the wages.
//Postcondition: Pay is calculated and returned
void yourFired(employeeType let[], int& listsize , long id); //int& cuz we are restando
cantidades de la lista.
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{
empID = id;
}
long employeeType::seqSearch() const
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return empID;
}
employeeType::employeeType(long id, string first, string last, char gender,
double, string jobRole,int years)
: personType(first, last)
{
empID = id;
}
//----------------------------------
int main ()
{
int number; // number of employees in the file
int id;
char choice;
class employeeType [MAX_EMPLOYEES], newrecord;
ifstream dataFile;
dataFile.open ( \"newEmployees.txt\");
if (!dataFile){
cout << \"\ Error with input file!!\ \ \";
//system (\"pause\"); // must #include
return 1;
}
getData (dataFile, employeeType, number);
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for(int i =0; i<3 ; i++){ //calling hireOne 3 times, you can insert 3 new employees on a roll
hireOne(employeeType, number); // the list increases by up to 3 new records each time
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define a class name Employee whose objects are records for employee..pdf
define a class name Employee whose objects are records for employee. Derive this class from the
class person given in the listing 8.1. An employee record inherits an employee\'s name from the
class Person. In addition, an employee record contains an annual salary represented as a single
value of type double, a hire date that gives the year hired as a single value of type int, and an
identification number that is a value of type String. Give your class a reasonable complement of
constructors, accessor methods, and mutator methods, as well as an equals method. Write a
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System.out.println(\"Constructor with name and hire date:\");
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System.out.println();
System.out.println(\"===============================\");
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System.out.println(\"Constructor with name, salary & ssn:\");
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System.out.println();
System.out.println(\"===============================\");
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e8.writeOutput();
System.out.println();
System.out.println(\"===============================\");
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System.out.println(\"Constructor with name, salary, hire date, and ssn:\");
e9.writeOutput();
System.out.println();
System.out.println(\"===============================\");
// Test methods to change, return and write values
// change all
System.out.println(\"Before:\");
e9.writeOutput();
System.out.println();
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