IRU (Information Retrieval and Use) Module Handbook

Transcription

1 IRU (Information Retrieval and Use) Module Handbook Contents Book list Module Specification Schedule Connecting to SQL Changing your password Creating the EMP and DEPT tables Exercises

2 Book List Information retrieval and Use ESSENTIAL READING Rolland, F.D (1997), Essence of Databases (Essence of Computing), Prentice-Hall. ISBN Suggested Background Texts Kendall K. E. & Kendall J.E (2000); Systems Analysis and Design (5 th edn); Prentice-Hall. Hoffer J A, Valacich J S and George J F (2001); Modern Systems Analysis and Design (3rd edn); Prentice Hall, ISBN Elliott G and Starkings S(1998), Business Information Technology, Prentice Hall, ISBN ; Patrick J.P. (2002), SQL Fundamentals (2 nd edition), Prentice Hall, ISBN Web sites The Module at askgeoff.org.uk Click the link to semester one, then the link to Information Retrieval and Use. The module in Blackboard Username and Password for Blackboard Usernames and passwords are needed to access the University IT and library facilities to ensure that only you can get to your work and . Your User Name is on your UNIVERSITY student card Your initial password for all University IT systems is your date of birth. Type this as six numbers without spaces (e.g ) You should see this module listed in my courses on the right of the homepage. If it s not there, tell me. explains further. Learning SQL

3 IRU SQL+ LOGIN INSTRUCTIONS Double click the SQL+ icon on the desktop to launch SQL+ In the dialogue box that appears enter your username (initial followed by surname e.g. GLEESE), password (set to your surname initially) and the host string ORACDB. It is recommended that you change your password. Do this by using the PASSWORD command as follows. At the SQL+ prompt enter PASSWORD <username> (e.g. PASSWORD GBRIDGES) You will be prompted for the old password, then the new password, and finally asked to retype the new password. SQL+ should respond, Password changed. Please note that it s not possible for anyone to tell you your password if you forget it. Database administrators can reset passwords. But this particular database administrator takes a dim view of it! Now you have a choice. If you want to use the EMP and DEPT tables in MY tablespace, then In the GLEESE user name there are two tables DEPT (see below) and EMP (see below. These are the tables required for SQL+ exercises. In order to make these tables available in your tablespace you will need to use these SQL+ commands CREATE SYNONYM DEPT FOR GLEESE.DEPT; CREATE SYNONYM EMP FOR GLEESE.EMP; You should now be able to carry out all of SQL exercises in the SQL+ environment. If you want to create EMP and DEPT tables of your own DON T create the synonyms, and follow the instructions later. Geoff Leese Information Retrieval and Use module leader September 2009

4 16/11/2009 Module Descriptor Code: CE Version: 1 Approval Status: Valid Current Title: INFORMATION RETRIEVAL AND USE Section: Computing, Engineering & Technology Level: 2 Contact Address VLE JANET FRANCIS J.FRANCIS@STAFFS.AC.UK Blackboard Pattern Of Delivery Credits Contact 15 Hours Site STAFFORD COLLEGE LEEK COLLEGE STOKE-ON- TRENT COLLEGE SOUTH STAFFORDSHIRE COLLEGE - TAMWORTH SHREWSBURY COLLEGE BURTON COLLEGE LICHFIELD STAFFORD STOKE Registration Conditions None Module Details Independent Study Hours Total Learning Hours A COURSEWORK weighted at 100%. Description of Pattern of Delivery Pattern 1, study 100% in period 2 Pattern 2, study 100% in period 1 Pattern 3, study 50% in period 1 Pattern 3, study 50% in period 2 Module Version Condition Text Assessment Details 100% Coursework consisting of a portfolio assessing Learning Outcomes 1-3. The portfolio (a phased series of tasks) will comprise a series of practical exercises.

5 Indicative Content Learning Strategies Entity models, relational design, mapping designs to implementations, normalisation and de-normalisation. Database languages SQL: DML, DDL and DCL Developing applications with database tools Information Retrieval Levels of Information Information Management Use of Information Related legislation One lecture and a blocked 3-hour laboratory tutorial period each week. The lecture will be used for keynote presentations. Parts of the block tutorial (e.g. the first and last hour) will be tutored and will comprise a mix of delivered material (including presentations) and guided tutorial work, which will include individual and group activities. Other parts of the block (e.g. the middle hour) will be set aside for untutored independent resource based learning. This will include problem based learning where students will be set a specific problem that requires a solution to be found, working through a tutorial book or analysing a case study. Every alternate week (six times in each 12-week teaching block), this session will be used as a surgery session for peer and self assessment to provide formative feedback and for guidance on assessment work. Independent study will involve directed reading in order to extend knowledge in areas of the indicative content covered by the classroom teaching. (1:n) 1, (1:20)2 Prospectus Information Resources Special Admissions Requirements Texts This follows on from the database introduction at level 1 (see CE IT Skills) by looking into Information Systems and specifically into information retrieval, types of information, levels of information and the management and use of information are also covered. The module also looks into the legislation associated with the management and use of information. ORACLE relational database management system or equivalent. Prior study of CE IT Skills or equivalent Disqualified Combination - CE Information Retrieval and Use (Blended Learning Version) or equivalent F D Rolland The Essence of Databases Prentice Hall 1998, ISBN: (Essential Reading) Learning Outcome 1) DEMONSTRATE KNOWLEDGE AND CRITICAL UNDERSTANDING OF INFORMATICS AND THE UNDERPINNING THEORIES. 2) SELECT APPROPRIATE PRACTICES AND TOOLS TO DESIGN AN EFFECTIVE INFORMATION SYSTEM. Learning Analysis Enquiry 3) RETRIEVAL OF INFORMATION USING SQL. Application

6 Creating your own EMP and DEPT tables Later in the module you ll learn the SQL commands for creating and populating tables. But since most of the early exercises involve extracting data from existing tables, here s a handy shortcut to create and populate the EMP and DEPT tables in your own tablespace. If you re daft enough to want to type in the SQL, here it is below. You might want to do it as a bit of early practice in creating and populating tables. As I say, if you re daft enough. DROP TABLE EMP; DROP TABLE DEPT; 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)); (7369, 'SMITH', 'CLERK', 7902, TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20); (7499, 'ALLEN', 'SALESMAN', 7698, TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30); (7521, 'WARD', 'SALESMAN', 7698, TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30); (7566, 'JONES', 'MANAGER', 7839, TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20); (7654, 'MARTIN', 'SALESMAN', 7698, TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30); (7698, 'BLAKE', 'MANAGER', 7839, TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30); (7782, 'CLARK', 'MANAGER', 7839, TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10); (7788, 'SCOTT', 'ANALYST', 7566, TO_DATE('19-APR-1987', 'DD-MON-YYYY'), 3000, NULL, 20); (7839, 'KING', 'PRESIDENT', NULL, TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10);

7 (7844, 'TURNER', 'SALESMAN', 7698, TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30); (7876, 'ADAMS', 'CLERK', 7788, TO_DATE('23-MAY-1987', 'DD-MON-YYYY'), 1100, NULL, 20); (7900, 'JAMES', 'CLERK', 7698, TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30); (7902, 'FORD', 'ANALYST', 7566, TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20); (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'); COMMIT;

8 Exercise 1: 1: List all employees whose salary is between 1000 and Show employee name, department and salary as below: ENAME DEPTNO SAL ALLEN WARD MARTIN TURNER ADAMS MILLER rows selected. 2: Display all the different types of occupations as below: JOB ANALYST CLERK MANAGER PRESIDENT SALESMAN 3: List details of employees in departments 10 or in department 30 as below: EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO ALLEN SALESMAN FEB WARD SALESMAN FEB MARTIN SALESMAN SEP BLAKE MANAGER MAY CLARK MANAGER JUN KING PRESIDENT 17-NOV TURNER SALESMAN SEP JAMES CLERK DEC MILLER CLERK JAN rows selected. 4: Display all employees who were recruited during 1982 giving their name, department and hiredate as below: ENAME HIREDATE DEPTNO APR JAN : List employees whose names have TH or LL in them as below: ENAME SMITH ALLEN MILLER 6: List the department numbers and names in department name order as below: DEPTNO DNAME ACCOUNTING 40 OPERATIONS 20 RESEARCH 30 SALES

9 7: Find the name, job, salary and commission of all employees who do not have managers ENAME JOB SAL COMM KING PRESIDENT : List all salesmen in descending order of their commission divided by their salary: ENAME COMM SAL MARTIN WARD ALLEN TURNER : Calculate the total annual compensation of all salesmen based upon their monthly salary and monthly commission: ENAME SAL COMM (SAL+COMM)* ALLEN WARD MARTIN TURNER : Find all the salesmen in department 30 who have a salary greater than or equal to $1500: ENAME SAL DEPTNO ALLEN TURNER Some of the above may vary slightly depending on the precise dataset you are using.

10 Exercise 2: 1: Find out how many managers there are without listing them. Display as below: COUNT(JOB) : Compute the average annual salary plus commission for all salesmen: COMPENSATION : Find the highest and lowest paid employees and the difference between them display as below: RICH POOR DIFFERENCE : Find the number of characters in the longest department name: LONGEST : Count the number of people in department 30 who receive a salary and the number of people who receive a commission: SALARIES COMMMISSION : List the average commission of employees who receive a commission and the average commission of all employees (treating employees who do not receive a commission as receiving a zero commission): AVECOMM AVEALL : List the average salary of employees that receive a salary, the average commission of employees that receive a commission, the average salary plus commission of only those employees that receive a commission, and the average salary plus commission of all employees including those who do not receive a commission. AVESAL AVECOMM AVETOTAL AVETOTALALLL

11 Exercise 3: 1: Select the name, job and date of hire of the employees in department 20. Display results as formatted below: ENAME JOB HIREDATE SMITH CLERK 12/17/80 JONES MANAGER 04/02/81 SCOTT ANALYST 04/19/87 ADAMS CLERK 05/23/87 FORD ANALYST 12/03/81 2: Select the name, job and date of hire of the employees in department 20. Display results as formatted below: ENAME JOB HIREDATE SMITH CLERK WEDNESDAY DECEMBER 17, 1980 JONES MANAGER THURSDAY APRIL 02, 1981 SCOTT ANALYST SUNDAY APRIL 19, 1987 ADAMS CLERK SATURDAY MAY 23, 1987 FORD ANALYST THURSDAY DECEMBER 03, : Select the name, job and date of hire of the employees in department 20. Display results as formatted below: ENAME JOB HIREDATE SMITH CLERK WEDNESDAY 17th DECEMBER, 1980 JONES MANAGER THURSDAY 02nd APRIL, 1981 SCOTT ANALYST SUNDAY 19th APRIL, 1987 ADAMS CLERK SATURDAY 23rd MAY, 1987 FORD ANALYST THURSDAY 03rd DECEMBER, : Select the name, job and date of hire of the employees in department 20. Display results as formatted below: ENAME JOB HIREDATE SMITH CLERK DECEMBER :12AM JONES MANAGER APRIL :04AM SCOTT ANALYST APRIL :04AM ADAMS CLERK MAY :05AM FORD ANALYST DECEMBER :12AM

12 5: Are there any employees who have worked for more than 20 years for the company? EMPNO ENAME DEPTNO SMITH ALLEN WARD JONES BLAKE CLARK TURNER 30 Note that the actual data displayed will depend upon the date the query is run. Look at the data in emp to k h h 6: Show the first day of the month in which each employee was hired. ENAME HIREDATE ADD_MONTH SMITH 17-DEC DEC-80 ALLEN 20-FEB FEB-81 WARD 22-FEB FEB-81 JONES 02-APR APR-81 MARTIN 28-SEP SEP-81 BLAKE 01-MAY MAY-81 CLARK 09-JUN JUN-81 SCOTT 19-APR APR-87 KING 17-NOV NOV-81 TURNER 08-SEP SEP-81 ADAMS 23-MAY MAY-87 JAMES 03-DEC DEC-81 FORD 03-DEC DEC-81 MILLER 23-JAN JAN-82 7: Show details of employee hire-dates and the date of their first payday. Paydays occur on the last Friday of each month. ENAME HIREDATE FIRSTPAYDAY SMITH 17-DEC-80 FRIDAY 26 DECEMBER 1980 ALLEN 20-FEB-81 FRIDAY 27 FEBRUARY 1981 WARD 22-FEB-81 FRIDAY 27 FEBRUARY 1981 JONES 02-APR-81 FRIDAY 24 APRIL 1981 MARTIN 28-SEP-81 FRIDAY 25 SEPTEMBER 1981 BLAKE 01-MAY-81 FRIDAY 29 MAY 1981 CLARK 09-JUN-81 FRIDAY 26 JUNE 1981 SCOTT 19-APR-87 FRIDAY 24 APRIL 1987 KING 17-NOV-81 FRIDAY 27 NOVEMBER 1981 TURNER 08-SEP-81 FRIDAY 25 SEPTEMBER 1981 ADAMS 23-MAY-87 FRIDAY 29 MAY 1987 JAMES 03-DEC-81 FRIDAY 25 DECEMBER 1981 FORD 03-DEC-81 FRIDAY 25 DECEMBER 1981 MILLER 23-JAN-82 FRIDAY 29 JANUARY 1982

13 Exercise 4: 1: Find the name and salary of employees in Dallas ENAME SAL LOC SMITH 800 DALLAS JONES 2975 DALLAS SCOTT 3000 DALLAS ADAMS 1100 DALLAS FORD 3000 DALLAS 2: Join the DEPT table to the EMP table and show in department number order DEPTNO DNAME JOB ENAME ACCOUNTING MANAGER CLARK 10 ACCOUNTING PRESIDENT KING 10 ACCOUNTING CLERK MILLER 20 RESEARCH CLERK SMITH 20 RESEARCH CLERK ADAMS 20 RESEARCH ANALYST FORD 20 RESEARCH ANALYST SCOTT 20 RESEARCH MANAGER JONES 30 SALES SALESMAN ALLEN 30 SALES MANAGER BLAKE 30 SALES SALESMAN MARTIN 30 SALES CLERK JAMES 30 SALES SALESMAN TURNER 30 SALES SALESMAN WARD 3: List all departments that have employees, plus those departments that do not have employees DEPTNO DNAME JOB ENAME ACCOUNTING MANAGER CLARK 10 ACCOUNTING PRESIDENT KING 10 ACCOUNTING CLERK MILLER 20 RESEARCH CLERK SMITH 20 RESEARCH CLERK ADAMS 20 RESEARCH ANALYST FORD 20 RESEARCH ANALYST SCOTT 20 RESEARCH MANAGER JONES 30 SALES SALESMAN ALLEN 30 SALES MANAGER BLAKE 30 SALES SALESMAN MARTIN 30 SALES CLERK JAMES 30 SALES SALESMAN TURNER 30 SALES SALESMAN WARD 40 OPERATIONS

14 4: List all departments that do not have any employees. DEPTNO DNAME JOB ENAME OPERATIONS 5: Find all the employees that earn more than JONES. Using temporary labels to abbreviate table names. ENAME SAL JOB ENAME SAL JOB SCOTT 3000 ANALYST JONES 2975 MANAGER KING 5000 PRESIDENT JONES 2975 MANAGER FORD 3000 ANALYST JONES 2975 MANAGER 6: For each employee whose salary exceeds his manager s salary, list the employee s name and salary and the manager s name and salary. ENAME SAL ENAME SAL SCOTT 3000 JONES 2975 FORD 3000 JONES 2975

15 Exercise 5: 1: Create a new table called LOANS with columns named LNO number (3), EMPNO number(4), TYPE CHAR(1), AMT number(8,2) 2: Insert the following data: LNO EMP NO TYPE AMT M C M The easiest way to provide evidence for this exercise is to select the material using the mouse and cut/paste into notepad. Then tidy it up putting your name, date and tutorial group on the top and print out. 3: Check that you have created 3 new records in LOANS 4: The loans table must be altered to include another column OUTST NUMBER(8,2) 5: Add 10% interest to all M type loans 6: Remove all loans less than $ : Change the name of LOANS table to ACCOUNTS 8: Change the name of column LNO to LOANNO 9: Create a view for use by personnel in department 30 showing employee name, number, job and hire-date 10: Use the view to show employees in department 30 having jobs which are not SALESMAN 11: Drop Column TYPE from ACCOUNTS table; 12: Create a view which will only show details of employees if it is used between the hours of 11:00 and 13:00 13: Create a view which shows summary information for each department. Hint for question 12: Convert the date using the to-number function Hint for question 13: By summary I mean average, sum etc:

16 Exercise 6: 1: Create a new table called property with columns named Property_number Varchar2(5), Postcode Varchar2(8) having property number as the primary key. 1. Use the describe function to check the table is set up correctly. 2. Check that the primary key has been correctly setup by viewing the constraints. 3. Attempt to enter correct data and data that is invalid such as no primary, duplicate primary keys and note the error. 4. Create a table called owner using the following structure. SQL> desc owner Name Null? Type OWNER_ID NOT NULL VARCHAR2(5) SURNAME NOT NULL VARCHAR2(15) FIRSTNAME VARCHAR2(15) 6. Alter the table called owner to make the owner_id a primary key 7. Create a table called rental using the following structure: create table rental ( 2 rental_id varchar(5) not null, 3 owner_id varchar(5) not null, 4 Property_number varchar(5) not null, 5 surname varchar(15) not null, 6 firstname varchar2(15), 7 primary key (rental_id) 8. Amend the table to add foreign keys as appropriate. 9. Attempt to enter data to check the referential integrity on the rental table 10. View the constraints on the table you have just created.

17 1: List the department number and average salary of each department DEPTNO AVG(SAL) Do the following questions using the group by function 2: Divide all the employees into groups by department and by job within department. Count the employees in each group and compute each group s average annual salary. DEPTNO JOB COUNT(*) AVG(SAL)* CLERK MANAGER PRESIDENT ANALYST CLERK MANAGER CLERK MANAGER SALESMAN rows selected. 3: Issue the same query as above except list the department name rather than the departments number. DNAME JOB COUNT(*) AVG(SAL)* ACCOUNTING CLERK ACCOUNTING MANAGER ACCOUNTING PRESIDENT RESEARCH ANALYST RESEARCH CLERK RESEARCH MANAGER SALES CLERK SALES MANAGER SALES SALESMAN : List the average annual salary for all job groups having more than 2 employees in the group. JOB COUNT(*) AVG(SAL)* CLERK MANAGER SALESMAN : List all the departments that have at least two clerks

18 DEPTNO : Find all departments with an average commission greater than 25% of average salary. DEPTNO AVG(SAL) AVG(COMM) AVG(SAL)* : Find each department s average annual salary for all its employees except the managers and the president. DEPTNO AVG(SAL)* : List the average annual salary for all job groups having more than 2 employees in the group. JOB AVG(SAL)* CLERK MANAGER SALESMAN 16800

19 Exercise 8: 1: List the name and job of employees who have the same job as JONES ENAME JOB JONES MANAGER BLAKE MANAGER CLARK MANAGER Do the following questions using nested subqueries 2: Find all the employees in department 10 that have a job that is the same as anyone in department 30 ENAME JOB MILLER CLERK CLARK MANAGER 3: List the name, job title and salary of employees who have the same job and salary as FORD ENAME JOB SAL SCOTT ANALYST 3000 FORD ANALYST : List the name, job and department of employees who have the same job as JONES or a salary greater than or equal to FORD ENAME JOB DEPTNO SAL SCOTT ANALYST FORD ANALYST CLARK MANAGER BLAKE MANAGER JONES MANAGER KING PRESIDENT rows selected. 5: Find all the employees in department 10 that have a job that is the same as anyone in the SALES department ENAME JOB MILLER CLERK CLARK MANAGER

20 6: Find the employees located in CHICAGO who have the same job as ALLEN. Return the results in alphabetical order by employee name. ENAME LOC SAL JOB ALLEN CHICAGO 1600 SALESMAN MARTIN CHICAGO 1250 SALESMAN TURNER CHICAGO 1500 SALESMAN WARD CHICAGO 1250 SALESMAN 7: Find all the employees that earn more than the average salary of employees in their department. DEPTNO ENAME SAL KING JONES SCOTT FORD ALLEN BLAKE rows selected.

21 Exercise 9: Question1: Use the Emp table and SQL Plus to produce the following two page report Staffordshire University Employee report Page: 1 DEPARTMENT EMPLOYEE SALARY KING $5,000 MILLER $1,300 CLARK $2,450 ********** sum $8, JONES $2,975 ADAMS $1,100 SCOTT $3,000 SMITH $800 FORD $3,000 ********** sum $10,875 School confidential Staffordshire University Employee report Page: 2 DEPARTMENT EMPLOYEE SALARY WARD $1,250 JAMES $950 TURNER $1,500 ALLEN $1,600 MARTIN $1,250 BLAKE $2,850 ********** sum $9, sum $29,025 School confidential 14 rows selected.

22 Question 2: Using Emp produce the following report Produce the following report extracting department 10 and 30 and the jobs of CLERK and SALESMAN make sure that it prints duplicate job values, prints the average of sal and inserts one blank line when the value of job changes and additionally prints the sum of sal and inserts another blank line when the value of deptno changes Employee report 2 Page: 1 Staffordshire University DEPARTMENT JOB EMPLOYEE SALARY CLERK MILLER $1,300 ********* avg $1,300 ********** sum $1, CLERK JAMES $950 ********* avg $950 SALESMAN MARTIN $1,250 SALESMAN ALLEN $1,600 SALESMAN TURNER $1,500 SALESMAN WARD $1,250 ********* avg $1,400 ********** sum $6,550 School confidential

23 Question3: Produce an sql script that shows the following screen(fig 1) and in response to the deptno being entered (in this case 300 will produce the report in fig 2. Please enter a valid department number. For example 10,20,30,40 DEPT:> 30 Fig 1: Staffordshire University Employee report 3 Page:1 DNAME SALES School confidential Fig 2