diff --git a/lib/command/impls/ls.ts b/lib/command/impls/ls.ts
index a7a26e9..8adaeb7 100644
--- a/lib/command/impls/ls.ts
+++ b/lib/command/impls/ls.ts
@@ -1,8 +1,6 @@
-import { userService } from '~/services/users';
 import { formatArg } from '../utils';
 import type { AsyncCommandFunc } from './types';
 import { fileService } from '~/services/files';
-import { groupService } from '~/services/groups';
 
 export const ls: AsyncCommandFunc = async function (...args) {
   // discard `ls`
@@ -21,8 +19,8 @@ export const ls: AsyncCommandFunc = async function (...args) {
     for (const file of files) {
       const fileType = formatFileType(file.fileType as string);
       const filePermissionBits = formatPermissionBits(file.permission as unknown as string);
-      const fileOwner = (await userService.getMetaOfUser(file.ownerId)).unwrap().name;
-      const fileGroup = (await groupService.getMetaOfGroup(file.groupId)).unwrap().name;
+      const fileOwner = file.ownerName;
+      const fileGroup = file.groupName;
       fileLines.push(`${fileType}${filePermissionBits} ${fileOwner} ${fileGroup} ${file.name}`);
     }
     return [
diff --git a/server/api/files/ls.get.ts b/server/api/files/ls.get.ts
index a690c77..48cd6bd 100644
--- a/server/api/files/ls.get.ts
+++ b/server/api/files/ls.get.ts
@@ -17,7 +17,14 @@ export default defineEventHandler(async (event) => {
     return { error: { code: FileLsErrorCode.INVALID_PARAM, message: 'Expect the "name" query param to be valid path' } };
   }
   try {
-    const { permission_bits: filePermissionBits, owner_id: fileOwnerId, group_id: fileGroupId, file_type: fileType, created_at: createdAt, updated_at: updatedAt } = await db.selectExactlyOne('files', { name: filepath.toString(), deleted_at: db.conditions.isNull }).run(dbPool);
+    const [{ permission_bits: filePermissionBits, owner_id: fileOwnerId, owner_name: ownerName, group_name: groupName, group_id: fileGroupId, file_type: fileType, created_at: createdAt, updated_at: updatedAt }] = await db.sql`
+      SELECT permission_bits, ${'files'}.${'name'}, owner_id, ${'users'}.${'name'} AS owner_name, ${'files'}.${'group_id'}, ${'groups'}.${'name'} AS group_name, file_type, ${'files'}.created_at, ${'files'}.updated_at
+      FROM ${'files'}
+      JOIN ${'users'} ON ${'files'}.${'owner_id'} = ${'users'}.${'id'}
+      JOIN ${'groups'} ON ${'files'}.${'group_id'} = ${'groups'}.${'id'}
+      WHERE ${'files'}.${'deleted_at'} IS NULL
+        AND ${'files'}.${'name'} = ${db.param(filepath.toString())}
+    `.run(dbPool);
     if (
       !canAccess(
         { userId: event.context.auth.userId as number, groupId: event.context.auth.groupId as number },
@@ -29,12 +36,20 @@ export default defineEventHandler(async (event) => {
     }
 
     if (fileType === 'file') {
-      return { ok: { message: 'Fetch file meta successfully', data: { files: [{ name: filepath.toString(), ownerId: fileOwnerId, groupId: fileGroupId, fileType: fileType, createdAt, updatedAt, permissionBits: filePermissionBits }] } } };
+      return { ok: { message: 'Fetch file meta successfully', data: { files: [{ name: filepath.toString(), ownerId: fileOwnerId, ownerName, groupName, groupId: fileGroupId, fileType: fileType, createdAt, updatedAt, permissionBits: filePermissionBits }] } } };
     }
 
-    const files = await db.select('files', { name: db.conditions.and(db.conditions.like(`${filepath.toString()}/%`), db.conditions.notLike(`${filepath.toString()}/%/%`)), deleted_at: db.conditions.isNull }).run(dbPool);
+    const files = await db.sql`
+      SELECT permission_bits, ${'files'}.${'name'}, owner_id, ${'users'}.${'name'} AS owner_name, ${'files'}.${'group_id'}, ${'groups'}.${'name'} AS group_name, file_type, ${'files'}.created_at, ${'files'}.updated_at
+      FROM ${'files'}
+      JOIN ${'users'} ON ${'files'}.${'owner_id'} = ${'users'}.${'id'}
+      JOIN ${'groups'} ON ${'files'}.${'group_id'} = ${'groups'}.${'id'}
+      WHERE ${'files'}.${'deleted_at'} IS NULL 
+        AND ${'files'}.${'name'} LIKE ${db.param(`${filepath.toString()}/%`)}
+        AND ${'files'}.${'name'} NOT LIKE ${db.param(`${filepath.toString()}/%/%`)}
+    `.run(dbPool);
 
-    return { ok: { message: 'Fetch folder\'s content successfully', data: { files: files.map(({ permission_bits, updated_at, name, file_type, created_at, owner_id, group_id }) => ({ name, fileType: file_type, createdAt: created_at, ownerId: owner_id, groupId: group_id, permissionBits: permission_bits, updatedAt: updated_at })) } } };
+    return { ok: { message: 'Fetch folder\'s content successfully', data: { files: files.map(({ permission_bits, updated_at, name, file_type, created_at, owner_id, group_id, owner_name, group_name }) => ({ name, fileType: file_type, createdAt: created_at, ownerId: owner_id, groupId: group_id, permissionBits: permission_bits, updatedAt: updated_at, groupName: group_name, ownerName: owner_name })) } } };
   } catch {
     return { error: { code: FileLsErrorCode.FILE_NOT_FOUND, message: 'File not found' } };
   }
diff --git a/services/files.ts b/services/files.ts
index e4d0906..cffa7ad 100644
--- a/services/files.ts
+++ b/services/files.ts
@@ -30,7 +30,9 @@ export interface FileMeta {
   fullName: string;
   permission: FilePermission;
   ownerId: number;
+  ownerName: string;
   groupId: number;
+  groupName: string;
   createdAt: Date;
   updatedAt: Date;
   fileType: string;
@@ -115,6 +117,8 @@ export const fileService = {
       createdAt: file.createdAt,
       updatedAt: file.updatedAt,
       fileType: file.fileType,
+      ownerName: file.ownerName,
+      groupName: file.groupName,
     })));
   },
   async removeFile (filename: string): Promise<Result<null, Diagnostic>> {