Dr. Zhen Jiang Computer Science Department West Chester University CSC 545: Database Systems Dr. Zhen Jiang Computer Science Department West Chester University

Class information Website www.cs.wcupa.edu/~zjiang/csc545index.htm

Why this class? Job hunting Something help you to stand out! WCU graduated, Database, Software Engineering, … vs. Undergraduates UPenn, Temple, Drexel, … Something help you to stand out!

Research project Critical thinking, communication, well-plan, etc. Real competition, deadline, pressure More realistic system, complex programming, for instance, http://www.cis.temple.edu/~jiang/RSU_van.pptx. Student opportunities: http://www.cs.wcupa.edu/~zjiang/student_info.htm Sponsorship NSF, NSA, etc Industry interns

No pain, no gain Need to handle those things coming from pressure: frustration, upset, madness, etc. Looking for solution, not excuse. Deadline!

Class website (including ppt)+ google search Hands-on experience Group discussion Happy ending!

How do you like to be introduced? No pain, no gain Happy ending Need to handle those things coming from pressure: frustration, upset, madness, etc. Looking for solution, not excuse. Deadline!

Where do you find data? Share the experience of data processing: Word, Power point, Excel, IE, and etc.

Word <Insert> <Copy> & <Paste> <Ctrl><p> <Symbol> ≥  <Copy> & <Paste> <Ctrl> <c>  <Ctrl> <v> <PrtSc> & <Alt> <PrtSc>  <Ctrl> <v> <Ctrl><p> Summer Training on Computer Science, WCU

Power Point ! <Insert> <Date and Time> Summer Training on Computer Science, WCU

<Slide Show> <Custom Animation>, <Add Effect>, <Motion Path> ! Summer Training on Computer Science, WCU

Excel Document resource: www.cs.wcupa.edu/~zjiang/summer07_student_grade_sample.xls. =average(c6:c28) Another well used function: SUM ! Summer Training on Computer Science, WCU

! <Insert> <Chart> Summer Training on Computer Science, WCU

<view> <freeze panes> B2, $b$2

Data preparation

IE Summer Training on Computer Science, WCU

Summer Training on Computer Science, WCU

Summer Training on Computer Science, WCU

What do we do with data? Exercise 1 http://www.cs.wcupa.edu/~zjiang/545_data.pdf Data curving 2D 3D surface Data extraction and recreation Data search

More efficient manner to store, search, and display the data! Conditional search Wildcard match

Database Systems & Access Is PC more popular? What is you laptop brand? What OS is installed, Linux or Windows? Access

Access <Start>  <All program>  …  <Microsoft Office Access 2007>

Input each piece of information manually

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Design view to change the format type (especially useful for currency and date input)

Database Systems & Access Page: AC14 Page: AC44 Exercise 1: http://www.cs.wcupa.edu/~zjiang/csc545_lab1.doc

Creating a report Report wizard, page AC50-AC56

Input & Output Load/import data from external resource, Page AC211

Plain text file

Excel file (xls or xlsx)

Querying Creation (Query wizzard) Save Use

Wildcard (*, ?), page AC87 Use criteria for a field not included in the result list, page AC88 Parameter Query, page AC89 Comparison Operator, page AC94 Compound criterion (AND, OR), page AC 95 Sorting, page AC97 Omitting duplicates, page AC 100 Multiple keys (high priority from left to right), page AC101 Top-value query, page AC 102 Multiple table, page AC103 Calculated field, page AC 113 Calculating Statistics and Aggregate Values, page AC 117

Show the name and age and salary of all employees who are younger than 25.

Double click the items to include in the list

Add criteria to meet the certain requirement

Datasheet view Design view

Comparison Operator, such as <25 in age field Wildcard (*, ?), such as “B*”, “*m*”, “*s”, and “S????” in LName field Compound criterion (AND => same row, OR => different rows) Sorting (By default, it is sorted in ascending order) Use criteria for a field not included in the result list, disabled show property Multiple keys (high priority from left to right) Top-value query, “return” in top design view Parameter Query, “[ ]” in dnum field, or any name that has not been used as column names (possiblily a misspelled column name) Calculated field, “zoom” in shortcut menu (e.g., “Total Amount:[Amount Paid]+[Current Due]”) Calculating Statistics (built-in statistics) Multiple table, share field Aggregations (statistics with “group by”)

Show the Enum, name, salary of all employees whose names have 5 letters.

Show the name, Enum ,salary, and age of all employees with a salary > $40,000 AND younger than 25

Show the Enum of all employees sorted by salary (i. e Show the Enum of all employees sorted by salary (i.e., in the ascending order by default)

Hidden column for criteria (not displayed in the list)

Q4 Enum E909 E303 E404 E222 E202 E101 E707 E606 E505 E808

Show the Enum of all employees sorted by salary (in ascending order) and LName (in descending alphabetical order)

Which? Q4 Enum E909 E303 E404 E222 E202 E101 E707 E606 E505 E808 Q4

List top 5 high paid employees.

List the LName of all employees in the department (Dnum) entered by the user.

List the LName of all employees with a new column labeled “hiring age”, which has a value by subtracting the years of working (wYears) from the current age (age).

List the max, min, and average of salary for all employees.

Multiple table (AC 105-109) Emp Dept Enum LName age salary Dnum wYears Jones 45 $56,000.00 D25 12 E202 Anders 66 $46,000.00 D22 25 E303 Smith 34 $25,000.00 9 E404 Rivera 22 $30,000.00 1 E505 Brown $80,000.00 17 E606 Caldwell 52 $70,000.00 D28 20 E707 Stiles 44 $65,000.00 11 E808 Walker 48 $90,000.00 21 E909 Hartman E222 Carter 29 $35,000.00 3 Dept Dnum Dname City D22 Web WC D25 Databases NY D28 Software LA

Multiple tables and aggregations (statistics with group) Exercise 2: http://www.cs.wcupa.edu/~zjiang/csc545_lab2.docx

For each employee, print out his/her name and the department name.

Calculation of aggregate values (aggregations, statistics with grouping)

Show the average age (label as “average age”) and average salary (label as “average salary”) for all employees

For all employees under 30, show a count of these employees and their average salary.

Show the max, min and average age for all employees in Dept “Software”

Multiple tables are needed!

Still sounds incorrect!

For all employees in department “D22” or “D28”, show a count of these employees, their average age, and maximum salary

What will be the result?

For each department list avg, max and min age, along with a count of employees in each department.

For each department find a count and average salary for all employees younger than 40.

For each department with an average salary of >40000 list the dnums, employee count for these departments.

For each department with less than 4 employees, show the average age and number of employees.  

For each department with more than 2 people over 40 list deptNum, and a count of these people.

Project 1 Submit accdb file.

Maintenance Record addition, page AC 144 Search, page AC 145 Record update, page AC 147 Record deletion, page AC 148 Filter, page AC 149