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

Class information Website

Why this class? ◦ Job hunting  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, ◦ Student opportunities: ◦ 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.

Summer Training on Computer Science, WCU ◦ ≥≥  & ◦  ◦ &  Word

Summer Training on Computer Science, WCU Power Point ◦

Summer Training on Computer Science, WCU ◦,,

Summer Training on Computer Science, WCU Excel =average(c6:c28) Another well used function: SUM Document resource: de_sample.xls. de_sample.xls

Summer Training on Computer Science, WCU ◦

B2, $b$2

Data preparation

Summer Training on Computer Science, WCU IE

Information stored in word, Excel, Powerpoint, PDF, txt (plain text), etc Share/exchange information PrimoPDF

What do we do with data? Exercise 1 ◦ ◦ 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

Exercise 1: ab1.doc ab1.doc

Access   … 

Input & Output ◦ Page AC211

Plain text file

Excel file (xls or xlsx)

Wildcard (*, ?), page AC87 Use criteria for a field not included in the result list, page AC88 Parameter Query, page AC89 Join table, page AC103 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 Calculated field, page AC 113 Calculating Statistics (built-in statistics, group), 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

Hidden column for criteria (not displayed in the list)

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 in the ascending order

Hidden column for criteria (not displayed in the list)

List all different Dnum, without duplicates.

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.

Wildcard (*, ?), such as “Ber*” in City field Use criteria for a field not included in the result list, disabled show property One table, decide it early and add all fields at the beginning Comparison Operator, such as >10000 in amount paid field Compound criterion (AND => 1 row, OR => another row) Sorting Omitting duplicates, “unique record” in property sheet Multiple keys (high priority from left to right) Top-value query, “return” in top design view (very early stage) Calculated field, “zoom” in shortcut menu (e.g., type “Total Amount:[Amount Paid]+[Current Due]”) Calculating Statistics (built-in statistics, “group by”)