完成发送代码，开始编写查询和清理已发送数据的代码。

code/sql/触发器.txt

@@ -0,0 +1,11 @@
+drop TRIGGER  xyxinfo_update;
+CREATE TRIGGER xyxinfo_update BEFORE INSERT ON huixiabao.HmbXyxInfo FOR EACH ROW
+BEGIN
+	delete from huixiabao.HmbXyxInfo_Update u where u.xyxNo = NEW.xyxNo;
+		INSERT INTO huixiabao.HmbXyxInfo_Update ( xyxNo, update_time )
+	VALUES
+		(
+			new.xyxNo,
+		SYSDATE());
+
+END