在oracle中創建視圖和觸發器sql

Question

我需要幫助創建視圖，然後觸發以下內容：輸入每個發票行項目時更新銷售人員佣金（銷售額的10％），庫存數量和客戶餘額。

這就是我現在所擁有的一種觀點：

CREATE OR REPLACE VIEW NEW_INVOICE_LINE_ITEM 
AS 
SELECT COMMISSION, INV_QUANTITY, CUSTOMER_BALANCE 
FROM SALESPERSON, INVENTORY, CUSTOMER; 

這就是我對觸發：

CREATE OR REPLACE TRIGGER UPDATE_COMMISSION 
AFTER INSERT ON INVOICE_LINE_ITEM FOR EACH ROW 
BEGIN 
UPDATE SALESPERSON 
SET COMMISSION = (SALE_PRICE * QUANTITY_SOLD) *.10 
WHERE :NEW.COMMISSION = SALESPERSON.COMMISSION; 
END; 

我不斷收到錯誤：壞綁定變量「 new.commission'

這是我的數據庫架構如下：

DROP TABLE PO_LINE_ITEM; 
DROP TABLE PURCHASE_ORDER; 
DROP TABLE VENDOR; 
DROP TABLE INVOICE_LINE_ITEM; 
DROP TABLE INVENTORY; 
DROP TABLE INVOICE; 
DROP TABLE SALESPERSON; 
DROP TABLE CUSTOMER; 
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); 

在此先感謝！

Answer 1

表invoice_line_item不包含列commission，這是壞綁定變量錯誤的原因。你應該重寫你的觸發代碼喜歡這裏：

create or replace trigger update_commission 
    after insert on invoice_line_item for each row 
begin 
    update salesperson sp 
    set sp.commission = sp.commission + (:new.sale_price * :new.quantity_sold * .1) 
    where sp.salesperson_id = 
     (select salesperson_id 
      from invoice i 
      where i.invoice_id = :new.invoice_id); 
end; 

在你view你沒有附加條件如何連接表，這裏的例子，如何做到這一點：

create or replace view vw_invoices as 
    select ili.invoice_id, ili.quantity_sold, ili.sale_price, 
     i.salesperson_id, sp.salesperson_name 
    from invoice_line_item ili 
    join invoice i on i.invoice_id = ili.invoice_id 
    join salesperson sp on sp.salesperson_id = i.salesperson_id; 

根據其信息您想要顯示 - 連接正確的表並使用正確的連接。