SQL Trigger for View

Question

Мне нужна помощь при создании представления, а затем триггеры для следующего: обновить комиссию продавца (10% от продажи), количество инвентаря и баланс клиента, когда введена каждая позиция счета.

Это то, что я прямо сейчас для просмотра: я получил это работает, но это показывает мне, что у меня есть ошибка в строке 8:

CREATE TABLE CUSTOMER 
(CUSTOMER_ID DECIMAL(2,0) PRIMARY KEY,  
CUSTOMER_NAME CHAR(25), 
CUSTOMER_ADDRESS CHAR(15), 
CUSTOMER_ZIPCODE DECIMAL(5,0), 
CUSTOMER_CITY CHAR(15), 
CUSTOMER_STATE CHAR(2), 
CUSTOMER_BALANCE DECIMAL(4,2) 
); 
CREATE TABLE SALESPERSON 
(SALESPERSON_ID DECIMAL(3,0) PRIMARY KEY, 
SALESPERSON_NAME CHAR(25), 
COMMISSION DECIMAL(5,2) 
); 
CREATE TABLE INVOICE 
(INVOICE_ID DECIMAL(3,0), 
CUSTOMER_ID DECIMAL(2,0), 
SALESPERSON_ID DECIMAL(3,0), 
ITEM_NUM DECIMAL(4,0), 
INVOICE_DATE DATE, 
PRIMARY KEY (CUSTOMER_ID, SALESPERSON_ID), 
FOREIGN KEY (CUSTOMER_ID) REFERENCES CUSTOMER, 
FOREIGN KEY (SALESPERSON_ID) REFERENCES SALESPERSON 
); 
CREATE TABLE INVENTORY 
(INV_NUM DECIMAL(4,0) PRIMARY KEY, 
DESCRIPTION CHAR(10), 
INV_QUANTITY DECIMAL(4,0), 
INV_PRICE DECIMAL(7,2), 
INV_COST DECIMAL(7,2), 
INVOICE_ID DECIMAL(3,0), 
ITEM_NUM DECIMAL(4,0), 
FOREIGN KEY (INVOICE_ID, ITEM_NUM) REFERENCES INVOICE 
); 
CREATE TABLE INVOICE_LINE_ITEM 
(QUANTITY_SOLD DECIMAL(4,0), 
SALE_PRICE DECIMAL(7,2), 
INVOICE_ID DECIMAL(3,0), 
INV_NUM DECIMAL(4,0), 
ITEM_NUM DECIMAL(4,0), 
PRIMARY KEY (INVOICE_ID, INV_NUM, ITEM_NUM), 
FOREIGN KEY (INVOICE_ID, ITEM_NUM) REFERENCES INVOICE, 
FOREIGN KEY (INV_NUM) REFERENCES INVENTORY 
); 
CREATE TABLE VENDOR 
(VENDOR_ID DECIMAL(2,0) PRIMARY KEY, 
VENDOR_NAME CHAR(25), 
CITY CHAR(15), 
STATE CHAR(2), 
VENDOR_BALANCE DECIMAL(4,2) 
); 
CREATE TABLE PURCHASE_ORDER 
(PURCHASE_ORDER_ID DECIMAL(2,0) PRIMARY KEY, 
BALANCE DECIMAL(4,2), 
SHIPMENT CHAR(10), 
PURCHASE_ORDER_DATE DATE, 
VENDER_ID DECIMAL (2,0), 
FOREIGN KEY (VENDER_ID) REFERENCES VENDOR 
); 
CREATE TABLE PO_LINE_ITEM 
(PO_DATE DATE, 
PO_BALANCE DECIMAL(4,0), 
ITEM_NUM DECIMAL(4,0), 
INV_QUANTITY DECIMAL(4,0), 
INV_NUM DECIMAL(4,0), 
PURCHASE_ORDER_ID DECIMAL(2,0), 
PRIMARY KEY (INV_NUM, PURCHASE_ORDER_ID), 
FOREIGN KEY (INV_NUM) REFERENCES INVENTORY, 
FOREIGN KEY (PURCHASE_ORDER_ID) REFERENCES PURCHASE_ORDER); 

SQL> CREATE OR REPLACE VIEW VW_INVOICES 
    2 AS 
    3 SELECT INVOICE_LINE_ITEM.INVOICE_ID, INVOICE.SALESPERSON_ID, 
    4 SALESPERSON.SALESPERSON_NAME, SALESPERSON.COMMISSION, 
    5 INVENTORY.ITEM_NUM, INVENTORY.INV_QUANTITY, 
    6 INVOICE.CUSTOMER_ID, CUSTOMER.CUSTOMER_BALANCE 
    7 FROM INVOICE_LINE_ITEM, INVOICE, SALESPERSON, INVENTORY, CUSTOMER 
    8 JOIN INVOICE ON INVOICE.INVOICE_ID = INVOICE_LINE_ITEM.INVOICE_ID 
    9 JOIN SALESPERSON ON SALESPERSON.SALESPERSON_ID = INVOICE.SALESPERSON_ID 
10 JOIN INVOICE ON INVOICE.ITEM_NUM = INVENTORY.ITEM_NUM 
11 JOIN CUSTOMER ON CUSTOMER.CUSTOMER_ID = INVOICE.CUSTOMER_ID; 
JOIN INVOICE ON INVOICE.INVOICE_ID = INVOICE_LINE_ITEM.INVOICE_ID 
             * 
ERROR at line 8: 
ORA-00904: "INVOICE_LINE_ITEM"."INVOICE_ID": invalid identifier 

Answer 1

Я думаю, что это должно быть INVOICE_LINE_ITEM.INVOICE_ID в запрос

CREATE OR REPLACE VIEW VW_INVOICES 
AS 
SELECT INVOICE_LINE_ITEM.INVOICE_ID, INVOICE.SALESPERSON_ID, 
SALESPERSON.SALESPERSON_NAME, SALESPERSON.COMMISSION, 
INVENTORY.ITEM_NUM, INVENTORY.INV_QUANTITY, 
INVOICE.CUSTOMER_ID, CUSTOMER.CUSTOMER_BALANCE 
FROM INVOICE_LINE_ITEM, INVOICE, SALESPERSON, INVENTORY, CUSTOMER 
JOIN INVOICE ON INVOICE.INVOICE_ID = INVOICE_LINE_ITEM.INVOICE_ID 
JOIN SALESPERSON ON SALESPERSON.SALESPERSON_ID = INVOICE.SALESPERSON_ID 
JOIN INVOICE ON INVOICE.ITEM_NUM = INVENTORY.ITEM_NUM 
JOIN CUSTOMER ON CUSTOMER.CUSTOMER_ID = INVOICE.CUSTOMER_ID; 
JOIN INVOICE ON INVOICE.INVOICE_ID = INVOICE_LINE_ITEM.INVOICE_ID 

Answer 2

вы расщепляется JOIN синтаксис между таблицами с comma, вызвавших эту ошибку, так что вы должны изменить свой SQL. Попробуйте это, может работать;)

CREATE OR REPLACE VIEW VW_INVOICES 
AS 
SELECT INVOICE_LINE_ITEM.INVOICE_ID, INVOICE.SALESPERSON_ID, 
    SALESPERSON.SALESPERSON_NAME, SALESPERSON.COMMISSION, 
    INVENTORY.ITEM_NUM, INVENTORY.INV_QUANTITY, 
    INVOICE.CUSTOMER_ID, CUSTOMER.CUSTOMER_BALANCE 
FROM INVOICE_LINE_ITEM 
JOIN INVOICE ON INVOICE.INVOICE_ID = INVOICE_LINE_ITEM.INVOICE_ID 
JOIN SALESPERSON ON SALESPERSON.SALESPERSON_ID = INVOICE.SALESPERSON_ID 
JOIN INVENTORY ON INVOICE.ITEM_NUM = INVENTORY.ITEM_NUM 
JOIN CUSTOMER ON CUSTOMER.CUSTOMER_ID = INVOICE.CUSTOMER_ID; 

О оракула JOIN, смотрите этот Joins, или вы могли бы просто использовать where пункт вместо JOIN