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BEGIN TRANSACTION;
/* Create a table called Customer */
Create table Customer(Cust_id int NOT NULL PRIMARY KEY,
Cust_name varchar(255) NOT NULL);
/* Create a table called Invoice */
Create table Invoice(Cust_id int NOT NULL,
Invoice_Number int NOT NULL PRIMARY KEY,
Invoice_Amount DECIMAL(7,2),FOREIGN KEY(Cust_id) REFERENCES Customer(Cust_id));
/* Create few records in this table */
insert into Customer values(1,'Brandon Thompson');
insert into Customer values(2,'Jason Richardson');
insert into Customer values(3,'Nicholas Ed');
insert into Customer values(4,'Ben King');
insert into Customer values(5,'Aqueela Lawson');
insert into Customer values(6,'Jay Taylor');
insert into Customer values(7,'Carson Knight');
insert into Invoice values(6,15001,500);
insert into Invoice values(2,15007,289);
insert into Invoice values(3,15987,1290);
insert into Invoice values(4,15980,120);
insert into Invoice values(5,15098,50);
insert into Invoice values(6,15976,19870);
insert into Invoice values(4,19877,1870);
insert into Invoice values(5,17980,300);
insert into Invoice values(6,19088,346);
insert into Invoice values(2,20090,25);
insert into Invoice values(4,13209,499);
insert into Invoice values(4,12098,89);
COMMIT;
/* Display all the records from the table */
SELECT * FROM Customer;
SELECT * FROM Invoice;
Select Invoice_Number, Invoice_Amount from Invoice where Invoice_Amount > 500 order by Invoice_Amount desc;
/*
Select C.Cust_name,Count(Invoice_Number) as Num_Of_Invoices from Customer C,Invoice I where C.Cust_id= I.Cust_id;
select Count(Invoice_Number) from Invoice group by Cust_id;
Select C.Cust_name,((select Count(Invoice_Number) from Invoice group by Cust_id))as Num_Of_Invoices from Customer C,Invoice I where C.Cust_id= I.Cust_id;
select Count(Invoice_Number) from Invoice group by Cust_id
*/
SELECT
C.Cust_name,
COUNT(I.Invoice_Number) AS "TOTAL Invoices"
FROM Customer C INNER JOIN Invoice I ON C.Cust_id= I.Cust_id
GROUP BY C.Cust_id;
Select C.Cust_name as Cust from Customer C where C.Cust_id not in (select I.Cust_id from Invoice I) order by C.Cust_name;
public class HelloWorld{
public static void main(String []args){
boolean t = false;
if(t){
System.out.println("false");
}else{
System.out.println("true");
}
}
}
