diff --git a/src/entity/service.ts b/src/entity/service.ts
index d5a712b..4d1accd 100644
--- a/src/entity/service.ts
+++ b/src/entity/service.ts
@@ -13,6 +13,7 @@ import {
 
 import { ServiceType } from './service_type';
 import { Room } from './room';
+import { ExaminationDetail } from './examination_detail';
 
 @Entity('services')
 export class Service {
@@ -29,17 +30,25 @@ export class Service {
     @JoinColumn()
     serviceType: ServiceType;
 
-    @ManyToMany(() => Room, (room) => room.services)
-    @JoinTable({
-        name: 'service_rooms',
-        joinColumn: { name: 'service_id', referencedColumnName: 'id' },
-        inverseJoinColumn: { name: 'room_id', referencedColumnName: 'id' },
-    })
-    rooms: Room[];
+	@ManyToMany(() => Room, (room) => room.services)
+	@JoinTable({
+		name: 'service_rooms',
+		joinColumn: { name: 'service_id', referencedColumnName: 'id' },
+		inverseJoinColumn: { name: 'room_id', referencedColumnName: 'id' },
+	})
+	rooms: Room[];
 
-    @Column()
-    @CreateDateColumn()
-    created_at: Date;
+	@ManyToMany(() => ExaminationDetail, { onDelete: 'NO ACTION' })
+	@JoinTable({
+		name: 'service_examinations',
+		joinColumn: { name: 'service_id', referencedColumnName: 'id' },
+		inverseJoinColumn: { name: 'examination_detail_id', referencedColumnName: 'id' },
+	})
+	examination_details: ExaminationDetail[];
+
+	@Column()
+	@CreateDateColumn()
+	created_at: Date;
 
     @Column({ nullable: true, length: 256 })
     created_by: string;