Help With JOIN Statement
Apr 24, 2008Hi, I'm doing a short lab assignment for a college SQL Server course, and I'm a little stuck up on one of the SELECT statements. Here's the questions: Create a SELECT statement that will return a list of all your employees, their project and the hours they have logged.
Here's the SQL Code:
CREATE TABLE project_employee (
employee_id INT,
employee_name VARCHAR(40),
employee_hire_date DATETIME,
employee_termination_date DATETIME,
employee_billing_rate INT,
CONSTRAINT project_employee_pk
PRIMARY KEY (employee_id)
);
CREATE TABLE project (
project_id INT,
project_name VARCHAR(40),
project_budget INT,
CONSTRAINT project_pk
PRIMARY KEY (project_id)
);
CREATE TABLE project_hours (
project_id INT,
employee_id INT,
time_log_date DATETIME,
hours_logged INT,
dollars_charged INT,
CONSTRAINT project_hours_pk
PRIMARY KEY (project_id, employee_id, time_log_date),
CONSTRAINT proj_hours_fkto_projectemployee
FOREIGN KEY (employee_id) REFERENCES project_employee,
CONSTRAINT proj_hours_fkto_project
FOREIGN KEY (project_id) REFERENCES project
);
INSERT INTO project
(project_id, project_name, project_budget)
VALUES (1001, 'Corporate Web Site',1912000);
INSERT INTO project
(project_id, project_name, project_budget)
VALUES (1002, 'Year 2000 Fixes',999998000);
INSERT INTO project
(project_id, project_name, project_budget)
VALUES (1003, 'Accounting System Implementation',897000);
INSERT INTO project
(project_id, project_name, project_budget)
VALUES (1004, 'Data Warehouse Maintenance',294000);
INSERT INTO project
(project_id, project_name, project_budget)
VALUES (1005, 'TCP/IP Implementation',415000);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (101, 'Jonathan Gennick','15-Nov-1961',null,169);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (102, 'Jenny Gennick','16-Sep-1964','5-May-1998',135);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (104, 'Jeff Gennick','29-Dec-1987','1-Apr-1998',99);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (105, 'Horace Walker','15-Jun-1998',null,121);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (107, 'Bohdan Khmelnytsky', '2-Jan-1998',null,45);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (108, 'Pavlo Chubynsky','1-Mar-1994','15-Nov-1998',220);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (110, 'Ivan Mazepa', '4-Apr-1998','30-Sep-1998',84);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (111, 'Taras Shevchenko', '23-Aug-1976',null,100);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (112, 'Hermon Goche', '15-Nov-1961','4-Apr-1998',70);
INSERT INTO project_employee
(employee_id, employee_name, employee_hire_date,
employee_termination_date, employee_billing_rate)
VALUES (113, 'Jacob Marley', '3-Mar-1998','31-Oct-1998',300);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1001,101,'01-JAN-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1003,101,'01-JAN-1998',3.00,507.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1005,101,'01-JAN-1998',5.00,845.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1002,101,'01-FEB-1998',7.00,1183.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1004,101,'01-FEB-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1001,101,'01-MAR-1998',3.00,507.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1003,101,'01-MAR-1998',5.00,845.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1005,101,'01-MAR-1998',7.00,1183.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1002,101,'01-APR-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1004,101,'01-APR-1998',3.00,507.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1001,101,'01-MAY-1998',5.00,845.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1003,101,'01-MAY-1998',7.00,1183.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1005,101,'01-MAY-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1002,101,'01-JUN-1998',3.00,507.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1004,101,'01-JUN-1998',5.00,845.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1001,101,'01-JUL-1998',7.00,1183.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1003,101,'01-JUL-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1005,101,'01-JUL-1998',3.00,507.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1002,101,'01-AUG-1998',5.00,845.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1004,101,'01-AUG-1998',7.00,1183.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1001,101,'01-SEP-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1003,101,'01-SEP-1998',3.00,507.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1005,101,'01-SEP-1998',5.00,845.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1002,101,'01-OCT-1998',7.00,1183.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1004,101,'01-OCT-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1001,101,'01-NOV-1998',3.00,507.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1003,101,'01-NOV-1998',5.00,845.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1005,101,'01-NOV-1998',7.00,1183.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1002,101,'01-DEC-1998',1.00,169.00);
INSERT INTO project_hours (project_id, employee_id, time_log_date, hours_logged, dollars_charged)
VALUES (1004,101,'01-DEC-1998',3.00,507.00);
And here's the SELECT statement that I've wrote so far, but I'm not sure how to get the JOIN working correctly. Tips?
SELECT
EMPLOYEE_NAME AS 'Employee''s Name', PROJECT_NAME AS 'Project Name', HOURS_LOGGED AS 'Hours Logged'
FROM
PROJECT_EMPLOYEE, PROJECT, PROJECT_HOURS
WHERE
PROJECT_HOURS.PROJECT_ID = PROJECT.PROJECT_ID AND PROJECT_EMPLOYEE.EMPLOYEE_ID = PROJECT_HOURS.EMPLOYEE_ID;