数据库表设计

create table t_article (
article_id integer,
article_title varchar2(200),
article_content varchar2(2000),
createdate date,
updatedate date
)

create table t_article_index(
article_id integer,
index_updatedate date
)

insert into t_article values (1,'title1','content1',sysdate,sysdate);
insert into t_article values (2,'title2','content2',to_date('2015-10-17 22:00:53','yyyy-MM-dd hh24:mi:ss'),sysdate);
insert into t_article values (3,'title3','content3',sysdate,to_date('2015-05-01 22:00:53','yyyy-MM-dd hh24:mi:ss'));
insert into t_article values (4,'title4','content4',sysdate,to_date('2015-07-01 22:00:53','yyyy-MM-dd hh24:mi:ss'));
insert into t_article values (5,'title5','content5',sysdate,to_date('2015-09-01 22:00:53','yyyy-MM-dd hh24:mi:ss'));

insert into t_article_index values (3,sysdate)
insert into t_article_index values (5,to_date('2014-09-01 22:00:53','yyyy-MM-dd hh24:mi:ss'))

select * from t_article;
select * from t_article_index;

select a.article_id,a.article_title,a.article_content,a.updatedate,ai.article_id as article_index_id,ai.index_updatedate from t_article a
left join t_article_index ai on a.article_id = ai.article_id
order by a.article_id

select a.article_id,a.article_title,a.article_content,a.updatedate,ai.article_id as article_index_id,ai.index_updatedate from t_article a
left join t_article_index ai on a.article_id = ai.article_id
where ai.article_id is null or a.updatedate > ai.index_updatedate
order by a.article_id

search_stock_article_index