打卡的一天

create table t_teacher(

　　id int  primary key,

　　name varchar(20)

);

create table t_place(

　　id int primary key, 

　　place_name varchar(20)

);

create table t_behavior(

　　id int primary key,

　　behavior_action varchar(20)

);

delete from t_teacher

insert into t_teacher values(1,'小马哥')；

insert into t_teacher values(2.'大成功')；

select*from t_teacher

insert into t_place values(1,'办公室')；

insert into t_place values(2,'厕所')；

insert into t_place values(3,'教师')；

select*from t_place

insert into t_behavior values(1,'看书')；

insert into t_behavior values(2,' 抽烟')；

insert into t_behavior values(3,'吃饭')；

select*from t_teacher

select*from t_place

select*from t_behavior