diff --git a/notes/SQL.md b/notes/SQL.md
index d50747b6..582121c3 100644
--- a/notes/SQL.md
+++ b/notes/SQL.md
@@ -69,6 +69,9 @@ CREATE TABLE mytable (
   PRIMARY KEY (`id`));
 ```
 
+
+查看表结构
+desc mytable;
 # 三、修改表
 
 添加列
@@ -78,6 +81,16 @@ ALTER TABLE mytable
 ADD col CHAR(20);
 ```
 
+修改表字段
+
+```sql
+ALTER TABLE [TABLE] MODIFY xxx VARCHAR(100) NOT NULL;
+```
+更改列名
+```sql
+ alter table mytable change view_point view varchar(1000) not null;
+
+
 删除列
 
 ```sql