비전공자 쿵도리의 개발자되기

package collection; import java.util.ArrayList; /** * * 스트링 타입의 리스트(숫자)의 합 * */public class ListExam1 {public static void main(String[] args) {ArrayList list = new ArrayList();list.add("100");list.add("50");list.add("10");// 합계계산출력String temp= null;int sum = 0;for(int i=0;i배)System.out.println(list);list.remove(1);System.out.println(list);list.remove(1); // 전체조회// 1. forString temp = null;for (i..

delete from t2 where rowid not in (select max(rowid) from t2 group by employee_id)

HR@orcl>create table products (prod_code number(6), 2 description varchar2(30), 3 price number(8,2)); Table created. HR@orcl>alter table products 2 add constraint products_prod_code_uk UNIQUE (prod_code) 3 DEFERRABLE DISABLE; Table altered. HR@orcl>select constraint_name, table_name, constraint_type, deferrable, status 2 from user_constraints 3 where table_name='PRODUCTS'; CONSTRAINT_NAME TABLE_..