deleteById 작성하기

jdbcTemplate.update()의 결과가 1이면 삭제 성공, 0이면 삭제 실패한 경우이다.

Related to: #37

src/main/java/com/example/naverrestaurant/db/H2DbRepositoryAbstract.java

@@ -55,7 +55,10 @@ public T save(T entity) {
 
     @Override
     public void deleteById(int index) {
-
+        String deleteByIdQuery = "delete from restaurant where index=?";
+        int deleteByIdParam = index;
+        int result = this.jdbcTemplate.update(deleteByIdQuery, deleteByIdParam);
+        System.out.println("delete : "+result);
     }
 
     @Override