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2208/天天乐学考试答案/MySQL练习（一）.md

@@ -58,7 +58,22 @@ SELECT *
 FROM t_salary
 WHERE money >= 5000 AND money <= 8000;
 
-#6
+#6 tj13 分组查询
+SELECT eid, MAX(money)
+FROM t_salary
+GROUP BY eid;
+
+#7 tj14 多表联查+条件过滤
+SELECT d.dname, e.ename
+FROM t_employee e, t_department d
+WHERE e.did = d.did AND e.position = '经理';
+
+#8
+CREATE VIEW v_hrm AS
+SELECT d.dname, e.ename, s.money, s.stime
+FROM t_employee e, t_department d, t_salary s
+WHERE e.did = d.did AND e.eid = s.eid
+ORDER BY s.stime DESC;
 
 #9 触发器
 DELIMITER $$
@@ -98,3 +113,4 @@ CALL pro_GetTopSalary('d0001', @result);
 SELECT @result;
 ```
 
+### 第二套