Half way No.1

01. 某物流公司数据库.md

@@ -62,7 +62,7 @@ SELECT P.Pno AS "包裹物流号", C.Cname AS "快递员姓名", D.Dtime AS "配
 
 ### 2. 查询2017-4-1至2017-5-1(包括2017-4-1和2017-5-1这两天)配送包裹数量至少为100个的快递员的姓名、年龄和底薪
 
-> 
+> `GROUP BY` 是聚合函数，可以把值相同的都放到一起。
 
 ```mysql
 SELECT C.Cname, C.Cage, C.Csalary
@@ -92,10 +92,45 @@ WHERE Cage IN (SELECT Cage FROM C WHERE Cage < 40);
 ### 4. 给定仓库的名称，输出为在该仓库有存储记录，且包裹状态为“派件中”的配送信息，输出格式为“快递员姓名/收货地址/收件人姓名/收件人联系方式/配送状态”，这里的“配送状态”设置方法为：若配送时间(Dtime)距今超过5天，则设置为“异常”；否则设置为“正常”
 
 ```mysql
-
+-- SELECT C.Cname AS "快递员姓名", P.Pto AS "收货地址", P.Preceiver AS "收件人姓名", P.Ptel AS "收件人联系方式", P.Pstatus AS "配送状态" FROM C, P;
+
+DELIMITER //
+CREATE PROCEDURE Deliver_Status()
+BEGIN
+    DECLARE Courier VARCHAR(10);
+    DECLARE Address VARCHAR(100);
+    DECLARE Receiver VARCHAR(10);
+    DECLARE Tel VARCHAR(20);
+    DECLARE Deliver_Time DATE;
+    DECLARE Deliver_Status VARCHAR(10); -- 设置配送状态
+    DECLARE COUNT INT DEFAULT 0;
+    DECLARE I INT DEFAULT 0;
+    DECLARE Cursor_Deliver CURSOR FOR SELECT C.Cname, P.Pto, P.Preceiver, P.Ptel, D.Dtime FROM C, P, D;
+    SELECT COUNT(*) INTO COUNT FROM P;
+    SET @Success = "正常";
+    SET @UnSuccess = "异常";
+    OPEN Cursor_Deliver;
+    REPEAT
+        SET I := I + 1;
+        FETCH Cursor_Deliver INTO Courier, Address, Receiver, Tel, Deliver_Time;
+        IF DATEDIFF(CURRENT_DATE(), @Deliver_Time) >= 5 THEN
+            SET Deliver_Status = @Success;
+        ELSE SET Deliver_Status = @UnSuccess;
+        END IF;
+        SELECT Courier AS "快递员姓名", Address AS "收货地址", Receiver AS "收件人姓名", Tel AS "收件人联系方式", Deliver_Status AS "配送状态";
+    UNTIL I >= COUNT END REPEAT;
+    CLOSE Cursor_Deliver;
+END;
+//
+DELIMITER ;
+CALL Deliver_Status();
 ```
 
 ### 5. 输出2017-4-1至2017-5-1期间(不包括2017-4-1和2017-5-1这两天)，收货地址包含“景德镇”的配送信息，输出格式化为“快递员姓名/物流号”，多个物流号之间以逗号隔开
 
+```mysql
+
+```
+
 ### 6. 用SQL写一个完整性规则，当插入配送信息时，将包裹状态置为“派件中”