Create an Oracle learning table in MySQL

The java journey finally arrived at JDBC. Before learning JDBC, I had to review the database. I downloaded the textbooks of Shang xuexiang Oracle on the Internet, and I could only install mysql on my local machine, so I want to create an oracle learning table in mysql. The bill is still successful.

When creating a table, replace NUMBER with int, varchar2 with varchar, datetime with date, and use the DATE function when inserting the table.

1. Create a database
Create database mydata;

2. Use the database
USE mydata

3. Create dept and emp tables
// Create a dept table
Create table dept
(
Deptno int primary key,
Dname VARCHAR (14 ),
Loc VARCHAR (13)
);
// Create an emp table
CREATE TABLE EMP
(Empno int (4) primary key,
Ename varchar (10 ),
Job varchar (9 ),
Mgr int (4 ),
Hiredate date,
Sal double,
Comm double,
Deptno INT,
Foreign key (deptno) REFERENCES dept (deptno)
);
// Create a salgrade table
Create table salgrade (
Grade int primary key,
Losal INT,
Hisal INT
)

4. insert data
INSERT INTO DEPT VALUES
(10, 'accounting', 'New YORK ');
Insert into dept values (20, 'Research ', 'Dallas ');
INSERT INTO DEPT VALUES
(30, 'sales', 'Chicago ');
INSERT INTO DEPT VALUES
(40, 'operations', 'boston ');
INSERT INTO EMP VALUES
(7369, 'Smith ', 'cler', 7902, DATE ('2017-12-17'), 1980, NULL, 20 );
INSERT INTO EMP VALUES
(7499, 'allen', 'salesman', 7698, DATE ('2017-2-20 '), 1981, 30 );
INSERT INTO EMP VALUES
(7521, 'ward ', 'salesman', 7698, DATE ('2017-2-22 '), 1981, 30 );
INSERT INTO EMP VALUES
(7566, 'Jones ', 'manager', 7839, DATE ('2017-4-2'), 1981, NULL, 20 );
INSERT INTO EMP VALUES
(7654, 'martin ', 'salesman', 7698, DATE ('2017-9-28 '), 1981, 30 );
INSERT INTO EMP VALUES
(7698, 'bucke', 'manager', 7839, DATE ('2017-5-1 '), 1981, NULL, 30 );
INSERT INTO EMP VALUES
(7782, 'clark', 'manager', 7839, DATE ('2017-6-9 '), 1981, NULL, 10 );
INSERT INTO EMP VALUES
(7788, 'Scott ', 'analyst', 7566, DATE ('2017-4-19'), 1987, NULL, 20 );
INSERT INTO EMP VALUES
(7839, 'King', 'President ', NULL, DATE ('2017-11-17'), 1981, NULL, 10 );
INSERT INTO EMP VALUES
(7844, 'turner ', 'salesman', 7698, DATE ('2017-9-8 '), 1981, 0, 30 );
INSERT INTO EMP VALUES
(7876, 'adams', 'cler', 7788, DATE ('2017-5-23 '), 1987, NULL, 20 );
INSERT INTO EMP VALUES
(7900, 'James ', 'cler', 7698, DATE ('2017-12-3'), 1981, NULL, 30 );
INSERT INTO EMP VALUES
(7902, 'Ford ', 'analyst', 7566, DATE ('2017-12-3'), 1981, NULL, 20 );
INSERT INTO EMP VALUES
(7934, 'miller ', 'cler', 7782, DATE ('2017-1-23'), 1982, NULL, 10 );
Insert into salgrade VALUES (1,700,120 0)
Insert into salgrade VALUES (1400)
Insert into salgrade VALUES (2000)
Insert into salgrade VALUES (4,2001, 3000)
Insert into salgrade VALUES (5, 3001, 9999)