Selecting Products That Belong to Category : Select « Select Query « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Select Query
  3. Select

Selecting Products That Belong to Category

    
SQL>
SQL>
SQL>
SQL> CREATE TABLE Product (
  2  ProductID INT NOT NULL PRIMARY KEY,
  3  Name VARCHAR(50) NOT NULL,
  4  Description VARCHAR(1000) NOT NULL,
  5  Price NUMBER NULL,
  6  ImagePath VARCHAR(50) NULL,
  7  soldout NUMBER(1,0) NULL,
  8  Promotion NUMBER(1,0) NULL);

Table created.

SQL>
SQL> CREATE SEQUENCE ProductIDSeq;

Sequence created.

SQL>
SQL> CREATE OR REPLACE TRIGGER ProductAutonumberTrigger
  2  BEFORE INSERT ON Product
  3  FOR EACH ROW
  4  BEGIN
  5     SELECT ProductIDSeq.NEXTVAL
  6     INTO :NEW.ProductID FROM DUAL;
  7  END;
  8  /

Trigger created.

SQL>
SQL> INSERT INTO Product (Name, Description, Price, ImagePath,soldout, Promotion)
  2  VALUES ('Pen', 'Ball Pen',5.99, 'pen.jpg', 1, 0);

1 row created.

SQL>
SQL> INSERT INTO Product (Name, Description, Price, ImagePath, soldout, Promotion)
  2  VALUES ('Ruler', 'Long',14.99, 'ruler.jpg', 0, 0);

1 row created.

SQL>
SQL> INSERT INTO Product (Name, Description, Price, ImagePath, soldout, Promotion)
  2  VALUES ('Desk', 'Computer Desk',5.99, 'desk.jpg', 0, 1);

1 row created.

SQL>
SQL> INSERT INTO Product (Name, Description, Price, ImagePath, soldout, Promotion)
  2  VALUES ('PC', 'Notebook',49.99, 'pc.jpg', 0, 1);

1 row created.

SQL>
SQL> INSERT INTO Product (Name, Description, Price, ImagePath, soldout, Promotion)
  2  VALUES ('Mouse', 'Wireless',9.99, 'mouse.jpg',  1, 0);

1 row created.

SQL>
SQL> INSERT INTO Product (Name, Description, Price, ImagePath, soldout, Promotion)
  2  VALUES ('Keyboard', 'keyboard',3.75, 'keyboard.jpg', 0, 0);

1 row created.

SQL>
SQL> CREATE TABLE ProductCategory (
  2  ProductID INT NOT NULL,
  3  CategoryID INT NOT NULL,
  4  PRIMARY KEY (ProductID, CategoryID)
  5  );

Table created.

SQL>
SQL>
SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (1,3);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (2,1);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (2,3);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (3,3);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (4,1);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (5,2);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (6,3);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (6,4);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (7,4);

1 row created.

SQL> INSERT INTO ProductCategory (ProductID, CategoryID) VALUES (8,5);

1 row created.

SQL>
SQL> SELECT Name
  2  FROM Product, ProductCategory
  3  WHERE Product.ProductID = ProductCategory.ProductID
  4  AND ProductCategory.CategoryID = 3;

NAME
--------------------------------------------------
Pen
Ruler
Desk
Keyboard

4 rows selected.

SQL>
SQL>
SQL> SELECT Name
  2  FROM Product INNER JOIN ProductCategory
  3  ON Product.ProductID = ProductCategory.ProductID
  4  WHERE ProductCategory.CategoryID = 3;

NAME
--------------------------------------------------
Pen
Ruler
Desk
Keyboard

4 rows selected.

SQL>
SQL>
SQL>
SQL> drop table product;

Table dropped.

SQL> drop sequence ProductIDSeq;

Sequence dropped.

SQL> drop table ProductCategory;

Table dropped.








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