diff --git a/docs/notes/SQL 练习.md b/docs/notes/SQL 练习.md
index 92f90ae6..a9a3a89b 100644
--- a/docs/notes/SQL 练习.md	
+++ b/docs/notes/SQL 练习.md	
@@ -1,64 +1,19 @@
 <!-- GFM-TOC -->
 * [595. Big Countries](#595-big-countries)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [627. Swap Salary](#627-swap-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [620. Not Boring Movies](#620-not-boring-movies)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [596. Classes More Than 5 Students](#596-classes-more-than-5-students)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [182. Duplicate Emails](#182-duplicate-emails)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [196. Delete Duplicate Emails](#196-delete-duplicate-emails)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [175. Combine Two Tables](#175-combine-two-tables)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [181. Employees Earning More Than Their Managers](#181-employees-earning-more-than-their-managers)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [183. Customers Who Never Order](#183-customers-who-never-order)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [184. Department Highest Salary](#184-department-highest-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [176. Second Highest Salary](#176-second-highest-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [177. Nth Highest Salary](#177-nth-highest-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [178. Rank Scores](#178-rank-scores)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [180. Consecutive Numbers](#180-consecutive-numbers)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [626. Exchange Seats](#626-exchange-seats)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 <!-- GFM-TOC -->
 
 
diff --git a/notes/SQL 练习.md b/notes/SQL 练习.md
index 92f90ae6..a9a3a89b 100644
--- a/notes/SQL 练习.md	
+++ b/notes/SQL 练习.md	
@@ -1,64 +1,19 @@
 <!-- GFM-TOC -->
 * [595. Big Countries](#595-big-countries)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [627. Swap Salary](#627-swap-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [620. Not Boring Movies](#620-not-boring-movies)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [596. Classes More Than 5 Students](#596-classes-more-than-5-students)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [182. Duplicate Emails](#182-duplicate-emails)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [196. Delete Duplicate Emails](#196-delete-duplicate-emails)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [175. Combine Two Tables](#175-combine-two-tables)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [181. Employees Earning More Than Their Managers](#181-employees-earning-more-than-their-managers)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [183. Customers Who Never Order](#183-customers-who-never-order)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [184. Department Highest Salary](#184-department-highest-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [176. Second Highest Salary](#176-second-highest-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [177. Nth Highest Salary](#177-nth-highest-salary)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [178. Rank Scores](#178-rank-scores)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [180. Consecutive Numbers](#180-consecutive-numbers)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 * [626. Exchange Seats](#626-exchange-seats)
-    * [Description](#description)
-    * [Solution](#solution)
-    * [SQL Schema](#sql-schema)
 <!-- GFM-TOC -->