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diff --git a/queries.sql b/queries.sql
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+/*
+==================================================
+🐼 Panda Market - queries.sql
+==================================================
+*/
+
+/*
+1️⃣ 내 정보 업데이트 하기
+- 닉네임을 "test"로 업데이트
+- 현재 로그인한 유저 id =1
+*/
+UPDATE users
+SET nickname = 'test'
+WHERE id = 1;
+
+
+/*
+2️⃣ 내가 생성한 상품 조회
+- user_id = 1
+- 최신순 정렬
+- 10개씩 페이지네이션 (3페이지 → OFFSET 20)
+*/
+SELECT id, name, price, created_at
+FROM products
+WHERE user_id = 1
+ORDER BY created_at DESC
+LIMIT 10 OFFSET 20;
+
+
+/*
+3️⃣ 내가 생성한 상품의 총 개수
+- user_id = 1
+*/
+SELECT COUNT(*) AS total_products
+FROM products
+WHERE user_id = 1;
+
+
+/*
+4️⃣ 내가 좋아요 누른 상품 조회
+- user_id = 1
+- 최신순 정렬
+- 10개씩 페이지네이션 (3페이지 → OFFSET 20)
+*/
+SELECT 
+  p.id, 
+  p.name, 
+  p.price, 
+  l.created_at AS liked_at
+FROM likes l
+JOIN products p ON p.id = l.product_id
+WHERE l.user_id = 1
+ORDER BY l.created_at DESC
+LIMIT 10 OFFSET 20;
+
+
+/*
+5️⃣ 내가 좋아요 누른 상품의 총 개수
+- user_id = 1
+*/
+SELECT COUNT(*) AS total_liked_products
+FROM likes
+WHERE user_id = 1 AND product_id IS NOT NULL;
+
+
+/*
+6️⃣ 상품 생성
+- user_id = 1
+*/
+INSERT INTO products (user_id, name, description, price)
+VALUES (1, '테스트 상품', '테스트용 상품입니다.', 15000);
+
+
+/*
+7️⃣ 상품 목록 조회
+- 상품명에 "test"가 포함된 상품
+- 최신순 정렬
+- 10개씩 페이지네이션 (1페이지 → OFFSET = 0)
+- 각 상품의 좋아요 개수를 포함
+*/
+SELECT 
+  p.id,
+  p.name,
+  p.price,
+  COUNT(l.id) AS like_count,
+  p.created_at
+FROM products p
+LEFT JOIN likes l ON l.product_id = p.id
+WHERE p.name ILIKE '%test%'
+GROUP BY p.id
+ORDER BY p.created_at DESC
+LIMIT 10 OFFSET 0;
+
+
+/*
+8️⃣ 상품 상세 조회
+- 1번 상품 조회
+- 좋아요 수 포함
+*/
+SELECT 
+  p.id,
+  p.name,
+  p.description,
+  p.price,
+  p.created_at,
+  COUNT(l.id) AS like_count
+FROM products p
+LEFT JOIN likes l ON l.product_id = p.id
+WHERE p.id = 1
+GROUP BY p.id;
+
+
+/*
+9️⃣ 상품 정보 수정
+- 1번 상품 수정
+- user_id = 1 (본인 상품만 수정 가능)
+*/
+UPDATE products
+SET 
+  name = '수정된 상품명',
+  description = '상품 설명이 수정되었습니다.',
+  price = 18000
+WHERE id = 1 AND user_id = 1;
+
+
+/*
+🔟 상품 삭제
+- 1번 상품 삭제
+- user_id = 1 (본인 상품만)
+*/
+DELETE FROM products
+WHERE id = 1 AND user_id = 1;
+
+
+/*
+11️⃣ 상품 좋아요
+- 1번 유저가 2번 상품 좋아요
+*/
+INSERT INTO likes (user_id, product_id)
+VALUES (1, 2)
+ON CONFLICT (user_id, product_id) DO NOTHING;
+
+
+/*
+12️⃣ 상품 좋아요 취소
+- 1번 유저가 2번 상품 좋아요 취소
+*/
+DELETE FROM likes
+WHERE user_id = 1 AND product_id = 2;
+
+
+/*
+13️⃣ 상품 댓글 작성
+- 1번 유저가 2번 상품에 댓글 작성
+*/
+INSERT INTO comments (user_id, product_id, content)
+VALUES (1, 2, '좋은 상품이네요!');
+
+
+/*
+14️⃣ 상품 댓글 조회
+- 1번 상품에 달린 댓글 목록
+- 최신 순
+- 댓글 날짜 2025-03-25 이전 데이터 10개
+*/
+SELECT 
+  c.id,
+  u.nickname AS author,
+  c.content,
+  c.created_at
+FROM comments c
+JOIN users u ON u.id = c.user_id
+WHERE c.product_id = 1
+  AND c.created_at < '2025-03-25'
+ORDER BY c.created_at DESC
+LIMIT 10;
diff --git a/schema.sql b/schema.sql
new file mode 100644
index 000000000..abd40a311
--- /dev/null
+++ b/schema.sql
@@ -0,0 +1,198 @@
+
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+  NEW.updated_at = NOW();
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- ===========================================
+-- USERS
+-- ===========================================
+CREATE TABLE users (
+  id SERIAL PRIMARY KEY,
+  email VARCHAR(50) UNIQUE NOT NULL,
+  nickname VARCHAR(255) NOT NULL,
+  password VARCHAR(100) NOT NULL,
+  image VARCHAR(255),
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL
+);
+
+CREATE TRIGGER trg_users_updated_at
+BEFORE UPDATE ON users
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+-- ===========================================
+-- PRODUCTS
+-- ===========================================
+CREATE TABLE products (
+  id SERIAL PRIMARY KEY,
+  user_id INT NOT NULL,
+  name VARCHAR(50) NOT NULL,
+  description VARCHAR(255),
+  price INT NOT NULL CHECK (price >= 0),
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  CONSTRAINT fk_products_user FOREIGN KEY (user_id)
+    REFERENCES users(id) ON DELETE CASCADE
+);
+
+CREATE INDEX idx_products_user_id ON products(user_id);
+CREATE INDEX idx_products_created_at ON products(created_at);
+
+CREATE TRIGGER trg_products_updated_at
+BEFORE UPDATE ON products
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+-- ===========================================
+-- IMAGES (상품 1:N)
+-- ===========================================
+CREATE TABLE images (
+  id SERIAL PRIMARY KEY,
+  product_id INT NOT NULL,
+  image_url VARCHAR(255) NOT NULL,
+  is_main BOOLEAN DEFAULT FALSE,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  CONSTRAINT fk_images_product FOREIGN KEY (product_id)
+    REFERENCES products(id) ON DELETE CASCADE
+);
+
+CREATE INDEX idx_images_product_id ON images(product_id);
+
+CREATE TRIGGER trg_images_updated_at
+BEFORE UPDATE ON images
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+-- ===========================================
+-- ARTICLES (게시판)
+-- ===========================================
+CREATE TABLE articles (
+  id SERIAL PRIMARY KEY,
+  user_id INT NOT NULL,
+  title VARCHAR(100) NOT NULL,
+  content TEXT NOT NULL,
+  image VARCHAR(255),
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  CONSTRAINT fk_articles_user FOREIGN KEY (user_id)
+    REFERENCES users(id) ON DELETE CASCADE
+);
+
+CREATE INDEX idx_articles_user_id ON articles(user_id);
+CREATE INDEX idx_articles_created_at ON articles(created_at);
+
+CREATE TRIGGER trg_articles_updated_at
+BEFORE UPDATE ON articles
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+-- ===========================================
+-- COMMENTS (상품/게시글 둘 다 가능)
+-- ===========================================
+CREATE TABLE comments (
+  id SERIAL PRIMARY KEY,
+  user_id INT NOT NULL,
+  product_id INT,
+  article_id INT,
+  content VARCHAR(255) NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  CONSTRAINT fk_comments_user FOREIGN KEY (user_id)
+    REFERENCES users(id) ON DELETE CASCADE,
+  CONSTRAINT fk_comments_product FOREIGN KEY (product_id)
+    REFERENCES products(id) ON DELETE CASCADE,
+  CONSTRAINT fk_comments_article FOREIGN KEY (article_id)
+    REFERENCES articles(id) ON DELETE CASCADE,
+  CONSTRAINT chk_comment_target CHECK (
+    (product_id IS NOT NULL AND article_id IS NULL) OR
+    (product_id IS NULL AND article_id IS NOT NULL)
+  )
+);
+
+CREATE INDEX idx_comments_user_id ON comments(user_id);
+CREATE INDEX idx_comments_product_id ON comments(product_id);
+CREATE INDEX idx_comments_article_id ON comments(article_id);
+
+CREATE TRIGGER trg_comments_updated_at
+BEFORE UPDATE ON comments
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+-- ===========================================
+-- LIKES (상품/게시글 좋아요)
+-- ===========================================
+CREATE TABLE likes (
+  id SERIAL PRIMARY KEY,
+  user_id INT NOT NULL,
+  product_id INT,
+  article_id INT,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  CONSTRAINT fk_likes_user FOREIGN KEY (user_id)
+    REFERENCES users(id) ON DELETE CASCADE,
+  CONSTRAINT fk_likes_product FOREIGN KEY (product_id)
+    REFERENCES products(id) ON DELETE CASCADE,
+  CONSTRAINT fk_likes_article FOREIGN KEY (article_id)
+    REFERENCES articles(id) ON DELETE CASCADE,
+  CONSTRAINT uq_like_product UNIQUE (user_id, product_id),
+  CONSTRAINT uq_like_article UNIQUE (user_id, article_id)
+);
+
+CREATE INDEX idx_likes_user_id ON likes(user_id);
+
+CREATE TRIGGER trg_likes_updated_at
+BEFORE UPDATE ON likes
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+-- ===========================================
+-- FAVORITES
+-- ===========================================
+CREATE TABLE favorites (
+  id SERIAL PRIMARY KEY,
+  user_id INT NOT NULL,
+  product_id INT NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
+  CONSTRAINT fk_favorites_user FOREIGN KEY (user_id)
+    REFERENCES users(id) ON DELETE CASCADE,
+  CONSTRAINT fk_favorites_product FOREIGN KEY (product_id)
+    REFERENCES products(id) ON DELETE CASCADE,
+  CONSTRAINT uq_favorites UNIQUE (user_id, product_id)
+);
+
+CREATE INDEX idx_favorites_user_id ON favorites(user_id);
+CREATE INDEX idx_favorites_product_id ON favorites(product_id);
+
+CREATE TRIGGER trg_favorites_updated_at
+BEFORE UPDATE ON favorites
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_at_column();
+
+-- ===========================================
+-- TAGS / PRODUCT_TAGS
+-- ===========================================
+CREATE TABLE tags (
+  id SERIAL PRIMARY KEY,
+  name VARCHAR(50) UNIQUE NOT NULL
+);
+
+CREATE TABLE product_tags (
+  id SERIAL PRIMARY KEY,
+  product_id INT NOT NULL,
+  tag_id INT NOT NULL,
+  CONSTRAINT fk_product_tags_product FOREIGN KEY (product_id)
+    REFERENCES products(id) ON DELETE CASCADE,
+  CONSTRAINT fk_product_tags_tag FOREIGN KEY (tag_id)
+    REFERENCES tags(id) ON DELETE CASCADE,
+  CONSTRAINT uq_product_tags UNIQUE (product_id, tag_id)
+);
+
+CREATE INDEX idx_product_tags_product_id ON product_tags(product_id);
+CREATE INDEX idx_product_tags_tag_id ON product_tags(tag_id);