1. CST221: Database Systems (II)
Dr. Zhen Jiang
Computer Science Department
West Chester University
West Chester, PA 19383

2. Querying
Creation (Query wizzard)
Save
Use

3. 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
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

4. Exercise 2

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

10. Double click the items to include in the list

14. Add criteria to meet the certain requirement

16. Datasheet view
Design view

18. Hidden column for criteria (not displayed in the list)

19. 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
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”)

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

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

32. Show the Enum of all employees sorted by salary in the ascending order

33. Hidden column for criteria (not displayed in the list)

35. List top 5 high paid employees.

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

46. 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).

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

59. Joint 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

60. For each employee, print out the department name.

67. Assignment 2

68. Statistics of an group
Exercise 3

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

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

79. Still incorrect!

82. Join Table (AC 105)

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

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

88. What will be the result?

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

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

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

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

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

111. Assignment 3

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