sqlite3 foreign key constraint so bad?

 
drop table t_group; 
drop table t_user; 


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); 

Why is the last one where I can use sql insert in sqlite3 success, but was intercepted in mysql?<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
Reply:
From the top. . .
Reply:
sqlite3 does not support foreign keys
Themselves with trigger control
Reply:
Upstairs according achieve good
Reply:
Enter the command line PRAGMA foreign_keys = ON; ok, you can support it.