mysql---where子查詢、form子查詢、exists子查詢
阿新 • • 發佈：2019-01-02
create table article(
article_id int(3),
article_title varchar(50),
article_content text,
article_comments int(3),
articlecategory_id int(3)
);
insert into article values(1,"fff1","contteee",55,1);
insert into article values(2,"fff2","conttffffffeee",15,2);
insert into article values(3,"fff3","conttdgfdfdsfeee",515,1);
insert into article values(4,"fff4","conttesdfsdfsee",505,1);
insert into article values(5,"fff5","conttesdfsdfee",545,2);
insert into article values(6,"fff6","conttesdfsee",575,2);
insert into article values(7,"fff7","conttesdfsdee",5,1);
insert into article values(8,"fff8","conttesdfsdfee",77,1);
article_id int(3),
article_title varchar(50),
article_content text,
article_comments int(3),
articlecategory_id int(3)
);
insert into article values(1,"fff1","contteee",55,1);
insert into article values(2,"fff2","conttffffffeee",15,2);
insert into article values(3,"fff3","conttdgfdfdsfeee",515,1);
insert into article values(4,"fff4","conttesdfsdfsee",505,1);
insert into article values(5,"fff5","conttesdfsdfee",545,2);
insert into article values(6,"fff6","conttesdfsee",575,2);
insert into article values(7,"fff7","conttesdfsdee",5,1);
insert into article values(8,"fff8","conttesdfsdfee",77,1);