diff --git a/app/db/init_db.py b/app/db/init_db.py
index 34a8c95..e9a38fc 100644
--- a/app/db/init_db.py
+++ b/app/db/init_db.py
@@ -143,6 +143,255 @@ def initialize_database():
         """
         )
 
+        # database_annotation 테이블 생성
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS database_annotation (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                db_profile_id VARCHAR(64) NOT NULL,
+                database_name VARCHAR(255) NOT NULL,
+                description TEXT,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (db_profile_id) REFERENCES db_profile(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # database_annotation 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_database_annotation_updated_at
+            BEFORE UPDATE ON database_annotation
+            FOR EACH ROW
+            BEGIN
+                UPDATE database_annotation SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
+        # table_annotation 테이블 생성
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS table_annotation (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                database_annotation_id VARCHAR(64) NOT NULL,
+                table_name VARCHAR(255) NOT NULL,
+                description TEXT,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (database_annotation_id) REFERENCES database_annotation(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # table_annotation 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_table_annotation_updated_at
+            BEFORE UPDATE ON table_annotation
+            FOR EACH ROW
+            BEGIN
+                UPDATE table_annotation SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
+        # column_annotation 테이블 생성 (단일 컬럼 스펙 전용)
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS column_annotation (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                table_annotation_id VARCHAR(64) NOT NULL,
+                column_name VARCHAR(255) NOT NULL,
+                -- 데이터 타입 (원본 DB의 타입 문자열을 그대로 저장; 예: BIGINT, TEXT, TIMESTAMP)
+                data_type VARCHAR(64),
+                -- NULL 허용 여부 (1:true, 0:false)
+                is_nullable INTEGER NOT NULL DEFAULT 1,
+                -- 기본값(리터럴 또는 표현식; 문자열 형태로 저장)
+                default_value TEXT,
+                -- 단일 컬럼 기준 CHECK 제약 표현(예: "value > 0")
+                check_expression TEXT,
+                -- 컬럼 순서
+                ordinal_position INTEGER,
+                -- 설명
+                description TEXT,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (table_annotation_id) REFERENCES table_annotation(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # column_annotation 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_column_annotation_updated_at
+            BEFORE UPDATE ON column_annotation
+            FOR EACH ROW
+            BEGIN
+                UPDATE column_annotation SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
+        # table_relationship 테이블 생성
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS table_relationship (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                database_annotation_id VARCHAR(64) NOT NULL,
+                from_table_id VARCHAR(64) NOT NULL,
+                to_table_id VARCHAR(64) NOT NULL,
+                relationship_type VARCHAR(32) NOT NULL,
+                description TEXT,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (database_annotation_id) REFERENCES database_annotation(id) ON DELETE CASCADE,
+                FOREIGN KEY (from_table_id) REFERENCES table_annotation(id) ON DELETE CASCADE,
+                FOREIGN KEY (to_table_id) REFERENCES table_annotation(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # table_relationship 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_table_relationship_updated_at
+            BEFORE UPDATE ON table_relationship
+            FOR EACH ROW
+            BEGIN
+                UPDATE table_relationship SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
+        # ---------------------------------------------------------------------
+        # 복합 제약(Primary/Unique/ForeignKey/Check) 메타데이터 테이블 생성
+        #  - 여러 컬럼을 묶는 제약을 '그룹' 단위로 관리
+        #  - UI 배지/목록은 이 테이블들에서 파생 계산
+        # ---------------------------------------------------------------------
+
+        # table_constraint 테이블 생성 (제약 그룹 본체)
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS table_constraint (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                table_annotation_id VARCHAR(64) NOT NULL,
+                -- PRIMARY_KEY | UNIQUE | FOREIGN_KEY | CHECK
+                constraint_type VARCHAR(16) NOT NULL,
+                -- DB 제약명(선택)
+                name VARCHAR(255),
+                -- CHECK 제약식 등 (FK/PK/UNIQUE에는 NULL 가능)
+                expression TEXT,
+                -- FOREIGN KEY 전용: 참조 테이블명
+                ref_table VARCHAR(255),
+                -- FOREIGN KEY 전용: 액션
+                on_update_action VARCHAR(16),
+                on_delete_action VARCHAR(16),
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (table_annotation_id) REFERENCES table_annotation(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # table_constraint 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_table_constraint_updated_at
+            BEFORE UPDATE ON table_constraint
+            FOR EACH ROW
+            BEGIN
+                UPDATE table_constraint SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
+        # constraint_column 테이블 생성 (제약 그룹 ↔ 컬럼 매핑)
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS constraint_column (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                constraint_id VARCHAR(64) NOT NULL,
+                column_annotation_id VARCHAR(64) NOT NULL,
+                -- 복합 제약 내 컬럼 순서(1, 2, 3, ...)
+                position INTEGER,
+                -- FOREIGN KEY 전용: 참조 테이블의 대응 컬럼명 (복합 FK 매핑)
+                referenced_column_name VARCHAR(255),
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (constraint_id) REFERENCES table_constraint(id) ON DELETE CASCADE,
+                FOREIGN KEY (column_annotation_id) REFERENCES column_annotation(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # constraint_column 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_constraint_column_updated_at
+            BEFORE UPDATE ON constraint_column
+            FOR EACH ROW
+            BEGIN
+                UPDATE constraint_column SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
+        # ---------------------------------------------------------------------
+        # 인덱스(복합 포함) 메타데이터 테이블 생성
+        #  - DB 인덱스명을 보존하고, 컬럼 순서를 기록
+        # ---------------------------------------------------------------------
+
+        # index_annotation 테이블 생성 (인덱스 그룹 본체)
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS index_annotation (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                table_annotation_id VARCHAR(64) NOT NULL,
+                name VARCHAR(255),                -- DB 인덱스명(선택)
+                is_unique INTEGER NOT NULL DEFAULT 0,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (table_annotation_id) REFERENCES table_annotation(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # index_annotation 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_index_annotation_updated_at
+            BEFORE UPDATE ON index_annotation
+            FOR EACH ROW
+            BEGIN
+                UPDATE index_annotation SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
+        # index_column 테이블 생성 (인덱스 그룹 ↔ 컬럼 매핑)
+        cursor.execute(
+            """
+            CREATE TABLE IF NOT EXISTS index_column (
+                id VARCHAR(64) PRIMARY KEY NOT NULL,
+                index_id VARCHAR(64) NOT NULL,
+                column_annotation_id VARCHAR(64) NOT NULL,
+                -- 인덱스 내 컬럼 순서(1, 2, 3, ...)
+                position INTEGER,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (index_id) REFERENCES index_annotation(id) ON DELETE CASCADE,
+                FOREIGN KEY (column_annotation_id) REFERENCES column_annotation(id) ON DELETE CASCADE
+            );
+            """
+        )
+        # index_column 테이블의 updated_at을 자동으로 업데이트하는 트리거
+        cursor.execute(
+            """
+            CREATE TRIGGER IF NOT EXISTS update_index_column_updated_at
+            BEFORE UPDATE ON index_column
+            FOR EACH ROW
+            BEGIN
+                UPDATE index_column SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+            END;
+            """
+        )
+
         conn.commit()
 
     except sqlite3.Error as e: