Oracle SQL sample database

Question

I\'m trying to learn Oracle SQL by database Supplied by it. I found somewhere tasks to be done. Database structure is supplied by Oracle:

CREATE TABLE EMP
(EMPNO         


        

Answer 1

When I created this I used this format to make it easier to read and modify it is for an Oracle format

CREATE TABLE EMP
    (EMP_NO NUMBER(4) NOT NULL  PRIMARY KEY,
      E_NAME VARCHAR2(10),
        JOB VARCHAR2(9),
          MGR NUMBER(4),
            HIRE_DATE DATE,
              SAL DECIMAL(7, 2),
                COMM DECIMAL(7, 2),
                  DEPT_NO NUMBER(2));

SELECT *
FROM EMP

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7369, 'SMITH', 'CLERK', 7902, '17-DEC-1980', 800, NULL, 20);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7499, 'ALLEN', 'SALESMAN', 7698, '20-FEB-1981', 1600, 300, 30);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7521, 'WARD', 'SALESMAN', 7698, '22-FEB-1981', 1250, 500, 30);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7566, 'JONES', 'MANAGER', 7839, '02-APR-1981', 2975, NULL, 20);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7654, 'MARTIN', 'SALESMAN', 7698, '28-SEP-1981', 1250, 1400, 30);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7698, 'BLAKE', 'MANAGER', 7839, '01-MAY-1981', 2850, NULL, 30);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7782, 'CLARK', 'MANAGER', 7839, '09-JUN-1981', 2450, NULL, 10);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7788, 'SCOTT', 'ANALYST', 7566, '09-DEC-1982', 3000, NULL, 20);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7839, 'KING', 'PRESIDENT', NULL, '17-NOV-1981', 5000, NULL, 10);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7844, 'TURNER', 'SALESMAN', 7698, '08-SEP-1981', 1500, 0, 30);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES    
    (7876, 'ADAMS', 'CLERK', 7788, '12-JAN-1983', 1100, NULL, 20);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7900, 'JAMES', 'CLERK', 7698, '03-DEC-1981', 950, NULL, 30);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7902, 'FORD', 'ANALYST', 7566, '03-DEC-1981', 3000, NULL, 20);

INSERT INTO EMP 
    (EMP_NO, E_NAME, JOB, MGR, HIRE_DATE, SAL, COMM, DEPT_NO)
VALUES
    (7934, 'MILLER', 'CLERK', 7782, '23-JAN-1982', 1300, NULL, 10);

CREATE TABLE DEPT
    (DEPT_NO NUMERIC(2),
      D_NAME VARCHAR(14),
        LOC VARCHAR(13) );

INSERT INTO DEPT 
    (DEPT_NO, D_NAME, LOC)
VALUES 
    (10, 'ACCOUNTING', 'NEW YORK');

INSERT INTO DEPT 
    (DEPT_NO, D_NAME, LOC)
VALUES 
    (20, 'RESEARCH', 'DALLAS');

INSERT INTO DEPT 
    (DEPT_NO, D_NAME, LOC)
VALUES 
    (30, 'SALES', 'CHICAGO');

INSERT INTO DEPT 
    (DEPT_NO, D_NAME, LOC)
VALUES 
    (40, 'OPERATIONS', 'BOSTON');

CREATE TABLE BONUS
    (E_NAME VARCHAR(10),
      JOB VARCHAR(9),
        SAL NUMERIC,
          COMM NUMERIC);

CREATE TABLE SAL_GRADE
    (GRADE NUMERIC,
      LO_SAL NUMERIC,
        HI_SAL NUMERIC);

INSERT INTO SAL_GRADE 
    (GRADE, LO_SAL, HI_SAL)
VALUES 
    (1, 700, 1200);

INSERT INTO SAL_GRADE 
    (GRADE, LO_SAL, HI_SAL)
VALUES 
    (2, 1201, 1400);

INSERT INTO SAL_GRADE 
    (GRADE, LO_SAL, HI_SAL)
VALUES 
    (3, 1401, 2000);

INSERT INTO SAL_GRADE 
    (GRADE, LO_SAL, HI_SAL)
VALUES 
    (4, 2001, 3000);

INSERT INTO SAL_GRADE 
    (GRADE, LO_SAL, HI_SAL)
VALUES 
    (5, 3001, 9999);