diff --git a/stockMate/src/main/resources/mappers/categoryMapper.xml b/stockMate/src/main/resources/mappers/categoryMapper.xml
index 5f740f5..86b100b 100644
--- a/stockMate/src/main/resources/mappers/categoryMapper.xml
+++ b/stockMate/src/main/resources/mappers/categoryMapper.xml
@@ -16,7 +16,7 @@
         <result property="updatedAt" column="updated_at" />
         <result property="isDeleted" column="is_deleted" />
     </resultMap>
-    
+
     <!-- 카테고리 등록 -->
     <insert id="insertCategory" parameterType="com.stockm8.domain.vo.CategoryVO">
         INSERT INTO test_categories (
@@ -39,7 +39,6 @@
         )
     </insert>
 
-
     <!-- 카테고리 목록 조회 -->
     <select id="selectAllCategories" resultMap="categoryResultMap">
         SELECT
@@ -57,7 +56,7 @@
     </select>
 
     <!-- 특정 사업자 소속의 카테고리 목록 조회 -->
-    <select id="selectCategoriesByBusinessId" parameterType="int" resultMap="categoryResultMap">
+    <select id="selectCategoriesById" parameterType="int" resultMap="categoryResultMap">
         SELECT
             category_id,
             parent_id,
@@ -73,8 +72,15 @@
         ORDER BY level ASC, category_name ASC
     </select>
 
+    <!-- 카테고리ID로 카테고리명 조회 -->
+    <select id="selectCategoryNameById" parameterType="int" resultType="String">
+        SELECT category_name
+        FROM test_categories
+        WHERE category_id = #{categoryId}
+    </select>
+
     <!-- 카테고리 존재 여부 확인 -->
-    <select id="existsById" parameterType="map" resultType="Boolean">
+    <select id="existsById" parameterType="map" resultType="int">
         SELECT COUNT(*)
         FROM test_categories
         WHERE category_id = #{categoryId}
@@ -87,7 +93,8 @@
         SET
             parent_id = #{parentId},
             category_name = #{categoryName},
-            level = #{level}
+            level = #{level},
+            updated_at = NOW()
         WHERE category_id = #{categoryId}
     </update>
 
@@ -97,86 +104,8 @@
         WHERE category_id = #{categoryId}
     </delete>
 
-<!-- 	카테고리 등록 -->
-	<insert id="insertCategory"
-    parameterType="com.stockm8.domain.vo.CategoryVO">
-    insert into categories (parentId, businessId,
-    categoryName, level,
-    createdAt)
-    values (#{parentId}, #{businessId},
-    #{categoryName}, #{level},
-    #{createdAt})
-	</insert>
-
-	<!-- 카테고리 목록 조회 -->
-	<select id="selectAllCategories" resultMap="categoryResultMap">
-		SELECT
-		category_id,
-		parent_id,
-		business_id,
-		category_name,
-		level,
-		created_at,
-		updated_at,
-		is_deleted
-		FROM test_categories
-		WHERE is_deleted = 0
-		ORDER BY level ASC, category_name ASC
-	</select>
-
-	<!-- 특정 사업자(businessId) 소속의 카테고리 목록을 조회 -->
-	<select id="selectCategoriesByBusinessId" parameterType="int"
-		resultMap="categoryResultMap">
-	    SELECT 
-	        category_id,
-	        parent_id,
-	        business_id,
-	        category_name,
-	        level,
-	        created_at,
-			updated_at,
-	        is_deleted
-	    FROM 
-	        test_categories
-	    WHERE 
-	        business_id = #{businessId}
-	        AND is_deleted = 0
-	    ORDER BY 
-	        level ASC, 
-	        category_name ASC
-	</select>
-	
-	<!-- 카테고리ID로 카테고리명 조회 -->
-	<select id="selectCategoryNameById" resultType="String" parameterType="int">
-    SELECT category_name
-    FROM test_categories
-    WHERE category_id = #{categoryId}
-	</select>
-
-	<!-- existsById 쿼리 -->
-	<select id="existsById" parameterType="map" resultType="int">
-		SELECT
-		EXISTS(
-		SELECT 1
-		FROM test_categories
-		WHERE category_id = #{categoryId}
-		AND business_id = #{businessId}
-		)
-	</select>
-
-	<!-- 카테고리 수정 -->
-	<update id="updateCategory"
-		parameterType="com.stockm8.domain.vo.CategoryVO">
-		update test_categories
-		set parent_id = #{parentId},
-		category_name = #{categoryName}, level =
-		#{level}
-		where category_id =
-		#{categoryId}
-	</update>
-
-    <!-- 상위 카테고리 조회 -->
-    <select id="selectParentCategories" resultMap="categoryResultMap">
+    <!-- 카테고리 ID로 조회 -->
+    <select id="selectCategoryById" parameterType="int" resultMap="categoryResultMap">
         SELECT
             category_id,
             parent_id,
@@ -187,31 +116,7 @@
             updated_at,
             is_deleted
         FROM test_categories
-        WHERE parent_id IS NULL
-          AND is_deleted = 0
-    </select>
-
-    <!-- 카테고리와 부모 카테고리 조회 -->
-    <select id="selectCategoryWithParents" resultMap="categoryResultMap">
-        SELECT
-            c.category_id,
-            c.parent_id,
-            c.business_id,
-            c.category_name,
-            c.level,
-            c.created_at,
-            c.updated_at,
-            c.is_deleted,
-            p.category_name AS parentCategoryName
-        FROM test_categories c
-        LEFT JOIN test_categories p ON c.parent_id = p.category_id
-        WHERE c.category_id = #{categoryId}
+        WHERE category_id = #{categoryId}
     </select>
-    
-    <select id="selectCategoryById" parameterType="int" resultType="com.stockm8.domain.vo.CategoryVO">
-    	SELECT * FROM test_categories WHERE category_id = #{categoryId}
-	</select>
-	
-
 
 </mapper>
\ No newline at end of file