SQLite数据库建立主键/外键的方法

create table t_group

(

id integer,

primary key (id)

);

create table t_user

(

id integer,

name text,

groupId integer,

primary key(id),

foreign key (groupId) references t_group(id) on delete cascade on update cascade

);

insert into t_group values(1);

insert into t_group values(2);

insert into t_user values(1,"j",2);

insert into t_user values(2,"a",3);