0419优化分组查询文档

sql/05.group.md

@@ -18,7 +18,7 @@ insert into employees values('11080304', '刘大无', '工程处', 30, 3226.68,
 insert into employees values('11080305', '张小七', '工程处', null, 2818.38, '2000-12-01 15:38:00.000', '职员')
 ```
 
-如表1
+如表
 
 ![](./static/images/05_01.png)