創建一個觸發器，從phpMyAdmin中的另一個表中獲取信息

Question

我試圖創建一個相當複雜的觸發器，我不確定它是否可以在phpMyAdmin上完成。

現在我有了這個查詢，它創建了一個包含我需要的所有信息的表格。

CREATE TABLE SeniorDB_Shipping 

SELECT 

    SeniorDB_Invoice.ID_Order, 
    SeniorDB_Customer.MCT_Code, 
    SeniorDB_Customer.Customer_Name, 
    SeniorDB_Customer.Customer_Address, 
    SeniorDB_Customer.Customer_City, 
    SeniorDB_Customer.Customer_State, 
    SeniorDB_Invoice.Shipping_Company 

FROM SeniorDB_Customer 

Join SeniorDB_Invoice ON SeniorDB_Customer.MCT_Code = SeniorDB_Invoice.MCT_Code 

正如你可以在圖片中看到，當我運行的查詢，它拉從以上信息表的信息。我試圖（和失敗）創建一個觸發器，可以做同樣的事情，而不必每次都需要create一張全新的表格。我所看到的所有其他帖子都是類似的，而不是inserting表格creating。

觸發器的作用是，當我輸入ID_Order時，其餘信息將從數據庫中拉出。

這是觸發我至今：

delimiter ~ 

     create trigger SeniorDB_Shipping before insert on SeniorDB_Shipping 
     for each row begin 
      set new.SeniorDB_Shipping.MCT_Code =   new.SeniorDB_Customer.MCT_Code,; 
      set new.SeniorDB_Shipping.Customer_Name =  new.SeniorDB_Customer.Customer_Name,; 
      set new.SeniorDB_Shipping.Customer_Address = new.SeniorDB_Customer.Customer_Address,; 
      set new.SeniorDB_Shipping.Customer_City =  new.SeniorDB_Customer.Customer_City,; 
      set new.SeniorDB_Shipping.Customer_State =  new.SeniorDB_Customer.Customer_State,; 
      set new.SeniorDB_Shipping.Shipping_Company = new.SeniorDB_Customer.Shipping_Company,; 
     end~ 

    delimiter ; 

我覺得我就在那裏。當我輸入ID_Order時，我無法將其鏈接到它。

這是，如果你想看到數據庫的頁面：http://polonium.forest.usf.edu/~sngamwon/SeniorProject/SeniorDB_Order.php

Answer 1

好了，所以你需要運行一次此：

/* Create the table with a primary key */ 
create table `SeniorDB_Shipping` (
    `id` INT unsigned AUTO_INCREMENT NOT NULL, 
    primary key(id), 
    `ID_Order` int NOT NULL, 
    `MCT_Code` int NOT NULL, 
    `Customer_Name` varchar(255) NOT NULL, 
    `Customer_Address` varchar(255) NOT NULL, 
    `Customer_City` varchar(255) NOT NULL, 
    `Customer_State` varchar(255) NOT NULL, 
    `Shipping_Company` varchar(255) NOT NULL 
) ENGINE=MyISAM CHARACTER SET=utf8 COLLATE utf8_general_ci; 

然後你可以運行

/* Insert statement */ 
INSERT INTO `SeniorDB_Shipping` (
    `ID_Order`, 
    `MCT_Code`, 
    `Customer_Name`, 
    `Customer_Address`, 
    `Customer_City`, 
    `Customer_State`, 
    `Shipping_Company` 
) SELECT 
    invoice.ID_Order, 
    customer.MCT_Code, 
    customer.Customer_Name, 
    customer.Customer_Address, 
    customer.Customer_City, 
    customer.Customer_State, 
    invoice.Shipping_Company 
FROM 
    SeniorDB_Customer as customer 
    Join SeniorDB_Invoice as invoice 
     ON customer.MCT_Code = invoice.MCT_Code; 

我已經在我自己的PHPMyAdmin中運行了它，所以它可以工作。但我顯然沒有你的架構。已知問題：

• 這將填充SeniorDB_Shipping，每次ALL將數據從你的兩個表。根據需要修改查詢，只選擇最近的數據，如果這不是你想要的。如果ID_Order是主鍵，您可以檢查它是否已經存在。