Problems trying to solve

Question

I'm a newbie to SQL, learning as I go. Can someone please help me on how to work these out?
1. Show a list of all employee names and their department names and the employees for each department. Be sure to show all departments whether there is an employee in the department or not. Use an outer join.
SELECT ename,dname
FROM emp JOIN dept
USING (ename)
ORDER BY ename
I feel like I'm missing the "show all dept where there is an employee in the dept or not" part???
2. Select all employee names and their department names. Be sure to show all employees whether they are assigned to a department or not. Use an outer join.
Here's what I have: (the questions are very similar so I would use the same thing)
SELECT ename,dname
FROM emp JOIN dept
USING (ename)
ORDER BY ename
TABLES for above 1-2:
CREATE TABLE EMP
(EMPNO NUMBER(4) NOT NULL,
ENAME VARCHAR2(10),
JOB VARCHAR2(9),
MGR NUMBER(4),
HIREDATE DATE,
SAL NUMBER(7, 2),
COMM NUMBER(7, 2),
DEPTNO NUMBER(2));
INSERT INTO EMP VALUES
(7369, 'SMITH', 'CLERK', 7902,
TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20);
INSERT INTO EMP VALUES
(7499, 'ALLEN', 'SALESMAN', 7698,
TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30);
INSERT INTO EMP VALUES
(7521, 'WARD', 'SALESMAN', 7698,
TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30);
INSERT INTO EMP VALUES
(7566, 'JONES', 'MANAGER', 7839,
TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20);
INSERT INTO EMP VALUES
(7654, 'MARTIN', 'SALESMAN', 7698,
TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30);
INSERT INTO EMP VALUES
(7698, 'BLAKE', 'MANAGER', 7839,
TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30);
INSERT INTO EMP VALUES
(7782, 'CLARK', 'MANAGER', 7839,
TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10);
INSERT INTO EMP VALUES
(7788, 'SCOTT', 'ANALYST', 7566,
TO_DATE('09-DEC-1982', 'DD-MON-YYYY'), 3000, NULL, 20);
INSERT INTO EMP VALUES
(7839, 'KING', 'PRESIDENT', NULL,
TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10);
INSERT INTO EMP VALUES
(7844, 'TURNER', 'SALESMAN', 7698,
TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30);
INSERT INTO EMP VALUES
(7876, 'ADAMS', 'CLERK', 7788,
TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20);
INSERT INTO EMP VALUES
(7900, 'JAMES', 'CLERK', 7698,
TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30);
INSERT INTO EMP VALUES
(7902, 'FORD', 'ANALYST', 7566,
TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20);
INSERT INTO EMP VALUES
(7934, 'MILLER', 'CLERK', 7782,
TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10);
CREATE TABLE DEPT
(DEPTNO NUMBER(2),
DNAME VARCHAR2(14),
LOC VARCHAR2(13) );
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');
CREATE TABLE BONUS
(ENAME VARCHAR2(10),
JOB VARCHAR2(9),
SAL NUMBER,
COMM NUMBER);
CREATE TABLE SALGRADE
(GRADE NUMBER,
LOSAL NUMBER,
HISAL NUMBER);
INSERT INTO SALGRADE VALUES (1, 700, 1200);
INSERT INTO SALGRADE VALUES (2, 1201, 1400);
INSERT INTO SALGRADE VALUES (3, 1401, 2000);
INSERT INTO SALGRADE VALUES (4, 2001, 3000);
INSERT INTO SALGRADE VALUES (5, 3001, 9999);
CREATE TABLE DUMMY
(DUMMY NUMBER);
INSERT INTO DUMMY VALUES (0);
Edited by: 950841 on Aug 3, 2012 5:44 PM
Edited by: 950841 on Aug 3, 2012 5:49 PM
3.     Write a query that that performs an inner join of the grade, student, and grade_type tables using ANSI SQL 99 syntax.
4.     Write a query that that performs an inner join of inner join of the grade, student, and grade_type tables using the Oracle inner join convention.
6.     Write a SQL statement using a set operator to show which students enrolled in a section that are not enrolled in any classes. Exclude students with student id less than 300.
TABLES for above 3 - 5:
CREATE TABLE SECTION
(SECTION_ID NUMBER(8,0)
,COURSE_NO NUMBER(8,0)
,SECTION_NO NUMBER(3,0)
,START_DATE_TIME DATE
,LOCATION VARCHAR2(50)
,INSTRUCTOR_ID NUMBER(8,0)
,CAPACITY NUMBER(3,0)
,CREATED_BY VARCHAR2(30)
,CREATED_DATE DATE
,MODIFIED_BY VARCHAR2(30)
,MODIFIED_DATE DATE
PROMPT Creating Table 'COURSE'
CREATE TABLE COURSE
(COURSE_NO NUMBER(8,0)
,DESCRIPTION VARCHAR2(50)
,COST NUMBER(9,2)
,PREREQUISITE NUMBER(8,0)
,CREATED_BY VARCHAR2(30)
,CREATED_DATE DATE
,MODIFIED_BY VARCHAR2(30)
,MODIFIED_DATE DATE
)PROMPT Creating Table 'ENROLLMENT'
CREATE TABLE ENROLLMENT
(STUDENT_ID NUMBER(8,0)
,SECTION_ID NUMBER(8,0)
,ENROLL_DATE DATE
,FINAL_GRADE NUMBER(3,0)
,CREATED_BY VARCHAR2(30)
,CREATED_DATE DATE
,MODIFIED_BY VARCHAR2(30)
,MODIFIED_DATE DATE
)PROMPT Creating Table 'STUDENT'
CREATE TABLE STUDENT
(STUDENT_ID NUMBER(8,0)
,SALUTATION VARCHAR2(5)
,FIRST_NAME VARCHAR2(25)
,LAST_NAME VARCHAR2(25)
,STREET_ADDRESS VARCHAR2(50)
,ZIP VARCHAR2(5)
,PHONE VARCHAR2(15)
,EMPLOYER VARCHAR2(50)
,REGISTRATION_DATE DATE
,CREATED_BY VARCHAR2(30)
,CREATED_DATE DATE
,MODIFIED_BY VARCHAR2(30)
,MODIFIED_DATE DATE
PROMPT Creating Table 'ZIPCODE'
CREATE TABLE ZIPCODE
(ZIP VARCHAR2(5)
,CITY VARCHAR2(25)
,STATE VARCHAR2(2)
,CREATED_BY VARCHAR2(30)
,CREATED_DATE DATE
,MODIFIED_BY VARCHAR2(30)
,MODIFIED_DATE DATE
Does this help?
Edited by: 950841 on Aug 3, 2012 5:51 PM
Edited by: 950841 on Aug 3, 2012 6:16 PM
Edited by: 950841 on Aug 3, 2012 6:41 PM

Answer 1

950841 wrote:
I'm a newbie to SQL, learning as I go. Can someone please help me on how to work these out?
Show a list of all employee names and their department names and the employees for each department. Be sure to show all departments whether there is an employee in the department or not. Use an outer join.
Select all employee names and their department names. Be sure to show all employees whether they are assigned to a department or not. Use an outer join.
Write a query that that performs an inner join of the grade, student, and grade_type tables using ANSI SQL 99 syntax.
Write a query that that performs an inner join of inner join of the grade, student, and grade_type tables using the Oracle inner join convention.
Write a SQL statement using a set operator to show which students enrolled in a section that are not enrolled in any classes. Exclude students with student id less than 300.How do I ask a question on the forums?
SQL and PL/SQL FAQ
post CREATE TABLE statements for all table required above.
You need to know table names & columns names in order to write any SQL statements!