diff --git "a/Chapter 03 - Introdution to SQL/Appendix_A - \352\263\274\354\240\234 \355\222\200\354\235\264/Note.md" "b/Chapter 03 - Introdution to SQL/Appendix_A - \352\263\274\354\240\234 \355\222\200\354\235\264/Note.md"
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+++ "b/Chapter 03 - Introdution to SQL/Appendix_A - \352\263\274\354\240\234 \355\222\200\354\235\264/Note.md"	
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+# 과제 풀이
+
+> 작성자: 이재혁
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 01 - Overview of the SQL Query Lanuage/Note.md b/Chapter 03 - Introdution to SQL/Item 01 - Overview of the SQL Query Lanuage/Note.md
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+++ b/Chapter 03 - Introdution to SQL/Item 01 - Overview of the SQL Query Lanuage/Note.md	
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+# Overview of the SQL Query Language
+
+> 작성자: 김나현
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 02 - SQL Data Definition/Note.md b/Chapter 03 - Introdution to SQL/Item 02 - SQL Data Definition/Note.md
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index 0000000..98d7cc5
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+++ b/Chapter 03 - Introdution to SQL/Item 02 - SQL Data Definition/Note.md	
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+# SQL Data Definition
+
+> 작성자: 김나현
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 03 - Basic Structure of SQL Queries/Note.md b/Chapter 03 - Introdution to SQL/Item 03 - Basic Structure of SQL Queries/Note.md
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index 0000000..a2916fb
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+++ b/Chapter 03 - Introdution to SQL/Item 03 - Basic Structure of SQL Queries/Note.md	
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+# Basic Structure of SQL Queries
+
+> 작성자: 김나현
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 04 - Additional Basic Operations/Note.md b/Chapter 03 - Introdution to SQL/Item 04 - Additional Basic Operations/Note.md
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+++ b/Chapter 03 - Introdution to SQL/Item 04 - Additional Basic Operations/Note.md	
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+# Additional Basic Operations
+
+> 작성자: 최선규
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 05 -Set Operations/Note.md b/Chapter 03 - Introdution to SQL/Item 05 -Set Operations/Note.md
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index 0000000..a836f27
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+++ b/Chapter 03 - Introdution to SQL/Item 05 -Set Operations/Note.md	
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+# Set Operations
+
+> 작성자: 최선규
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 06 - Null Values/Note.md b/Chapter 03 - Introdution to SQL/Item 06 - Null Values/Note.md
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+++ b/Chapter 03 - Introdution to SQL/Item 06 - Null Values/Note.md	
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+# Null Values
+
+> 작성자: 최선규
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 07 - Aggregate Funtions/Note.md b/Chapter 03 - Introdution to SQL/Item 07 - Aggregate Funtions/Note.md
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index 0000000..52edeaf
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+++ b/Chapter 03 - Introdution to SQL/Item 07 - Aggregate Funtions/Note.md	
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+# Aggregate Functions
+
+> 작성자: 최선규
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 08 - Nested Subqueries/Note.md b/Chapter 03 - Introdution to SQL/Item 08 - Nested Subqueries/Note.md
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index 0000000..c2f5dd6
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+++ b/Chapter 03 - Introdution to SQL/Item 08 - Nested Subqueries/Note.md	
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+# Nested Subqueries
+
+> 작성자: 최선규
+
+## 목차
diff --git a/Chapter 03 - Introdution to SQL/Item 09 - Modification of the Database/Note.md b/Chapter 03 - Introdution to SQL/Item 09 - Modification of the Database/Note.md
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index 0000000..d3d7e09
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+++ b/Chapter 03 - Introdution to SQL/Item 09 - Modification of the Database/Note.md	
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+# Modification of the Database
+
+> 작성자: 최선규
+
+## 목차