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mysql> create database university;
Query OK, 1 row affected (0.03 sec)

mysql> create table department(id int,name varchar(30));
ERROR 1046 (3D000): No database selected
mysql> use university;
Database changed
mysql> create table department(id int,name varchar(30));
Query OK, 0 rows affected (0.33 sec)

mysql> create table student(id int,code varchar(8),fname varchar(30),lname varch
ar(30),phone int,email varchar(30),int depid);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'int d
epid)' at line 1
mysql> create table student(id int,code varchar(8),fname varchar(30),lname varch
ar(30),phone int,email varchar(30),depid int);
Query OK, 0 rows affected (0.35 sec)

mysql> show tables;
+----------------------+
| Tables_in_university |
+----------------------+
| department           |
| student              |
+----------------------+
2 rows in set (0.00 sec)

mysql> alter table department add primary key(id);
Query OK, 0 rows affected (0.65 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> create table lesson(id int,name varchar(30));
Query OK, 0 rows affected (0.28 sec)

mysql> alter table lesson add primary key(id);
Query OK, 0 rows affected (0.66 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> alter table student add primary key(id);
Query OK, 0 rows affected (0.67 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> alter table student add foreign key(depid) references department(id);
Query OK, 0 rows affected (0.74 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> alter table lesson add foreign key(depid) references department(id);
ERROR 1072 (42000): Key column 'depid' doesn't exist in table
mysql> alter table lesson alter column credit int;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'int'
at line 1
mysql> alter table lesson add credit int;
Query OK, 0 rows affected (0.63 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> alter table lesson add depid int;
Query OK, 0 rows affected (0.47 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> alter table lesson add foreign key(depid) references department(id);
Query OK, 0 rows affected (0.68 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> insert into department values(1,"Computer science");
Query OK, 1 row affected (0.07 sec)

mysql> insert into department values(2,"Information Technology");
Query OK, 1 row affected (0.05 sec)

mysql> insert into department values(3,"Multimedia");
Query OK, 1 row affected (0.04 sec)

mysql> insert into department values(4,"Internet Business");
Query OK, 1 row affected (0.06 sec)

mysql> insert into department values(5,"Electronic Engineering");
Query OK, 1 row affected (0.06 sec)

mysql> insert into department values(6,"Medical Engineering");
Query OK, 1 row affected (0.05 sec)

mysql> insert into student values(1,IC11D001,"bat","dorj",99898989,"bat@yahoo.co
m",1);
ERROR 1054 (42S22): Unknown column 'IC11D001' in 'field list'
mysql> insert into student values(1,'IC11D001','bat','dorj',99898989,'bat@yahoo.
com',1);
Query OK, 1 row affected (0.07 sec)

mysql> insert into student values(1,'IC11D001','bat','dorj',99898989,'bat@yahoo.
com',1);