Question

我有2个具有相同列的表。我有一个触发器，可以在table_1中将数据从table_2添加到table_1后插入table_1。如何创建触发器，将更新的行从table_2更新为import java.net.MalformedURLException; import org.apache.xmlrpc.XmlRpcException; import org.codehaus.swizzle.confluence.Page; import org.xwiki.xmlrpc.XWikiXmlRpcClient; public class UpdatePage { public static void main(String[] args) throws MalformedURLException, XmlRpcException { //URL of the xwiki instance String url = "http://localhost:8080/xwiki/xmlrpc/confluence"; //Replace user & pass with desired xwiki username & password String user = "Admin"; String pass = "admin"; XWikiXmlRpcClient rpc = new XWikiXmlRpcClient(url); try { //Perform Login & Authentication rpc.login(user, pass); //Create a Page object to hold our Document information Page page = new Page(); //Fetch the required page. In our example, the page is in Space "demo code" //and the Page is "Update Page" page=rpc.getPage("demo code.Update Page"); //Fetch the content of the page & store it in a string for temporary storage //This is the present content of the Page String presentContent=page.getContent(); //Create a string that will hold the new content that is to be added to the Page String newContent="\\\\Some new content added"; //Set the content of the page as: present content + new content //However, this page is not yet stored to XWiki. It only resides in your application page.setContent(presentContent+newContent); //Finally, store the "updated" Page to XWiki rpc.storePage(page); //Just to make sure everything saved all right, fetch the content again for the Page System.out.println(page.getContent()); } catch (XmlRpcException e) { System.out.println("invalid username/password was specified or communication problem or "); System.out.println(e); } finally { rpc.logout(); } } }？

Answer 1

我的说法与您AFTER INSERT触发器的说法相同，只需指定AFTER UPDATE：

delimiter //
CREATE TRIGGER tr_uau_table_1_table_2 AFTER UPDATE ON table_1
FOR EACH ROW
BEGIN
    UPDATE `table_2`
    SET    `a`  = NEW.a ,
           `b`  = NEW.b ,
    WHERE  `id` = OLD.id;
END;//
delimiter ;

（我没试过。）

MySQL文档：https://dev.mysql.com/doc/refman/5.7/en/trigger-syntax.html

mysql触发器更新具有相同列的另一个表行

1 个答案: