Built for a composite refrigeration service company, IT163's Unit 3 table build types and constrains every field, loads sample records and documents each choice in a data dictionary. Searches like "it 163 unit 3 assignment example", "it163 unit 3 sample" and "it163 unit 3 example" land here.
What a finished IT163 Unit 3 database table build looks like
One .accdb file and a four-page data dictionary. The navigation pane lists tblCustomers, tblTechnicians, tblEquipment, tblServiceCalls and tblParts, named without spaces under a consistent prefix. Customers carries 18 records, technicians 6, equipment 45, parts 30 and service calls 60. In design view, ZIP is Short Text sized to 10, phone numbers use an input mask, state is limited to two characters, and HireDate displays as Short Date. LaborHours is a Number field with Double size so a call can log 1.5 hours; UnitCost and ChargedRate are Currency. Status draws on a value list limited to Open, Scheduled and Completed. Foreign key fields such as CustomerID in tblEquipment already exist as Long Integer numbers, waiting for the relationships that usually arrive next.
How a IT163 Unit 3 example is structured
Table order follows dependency: tables that other tables will point to are built first, so customers and technicians exist before the equipment and calls that refer to them. Within each table the primary key comes first, then descriptive fields, then foreign keys, which keeps design view readable. The data dictionary mirrors that order, one table per page section, with columns for field name, data type, size or format, required, validation rule and a plain reason. The reason column carries most of the grade, because it shows that Short Text for ZIP and Currency for money were decisions, not defaults. Sample data is entered after every property is set, so validation rules are exercised by real records. Deferred on purpose, and listed at the end: relationships, the parts-per-call table, and any enforced integrity between them.
Five tables in dependency order
Parent tables come first, so every foreign key field in equipment and calls has something real to refer to once relationships are drawn.
Types that match behavior
Text for identifiers that are never calculated, Currency for money, Double for fractional hours and Date/Time for anything that must sort chronologically.
Constraints set as properties
Input masks on phone numbers, a validation rule refusing negative labor hours, required flags on customer names and a three-value list controlling call status.
Sample records that test rules
Composite data loaded after the properties exist, including a ZIP code beginning with zero that would have been silently damaged in a Number field.
Data dictionary with reasons
Every field appears with its type, size, rule and a one-line justification, so the file's design can be assessed without opening Access at all.
Where marks go in IT163 Unit 3
Design view, not datasheet view, is where a table build's deductions usually sit. Default field sizes of 255 characters on every text field signal that nothing was considered. Numbers stored as Short Text break later sorting and arithmetic, and the reverse mistake, ZIP codes or phone numbers as Number fields, strips leading zeros or rejects hyphens. A missing primary key, or a key placed on a field such as business name that can repeat, fails a core rubric row in many sections. Foreign key fields typed differently from the keys they will match, Short Text against an AutoNumber, cause relationship errors that surface a unit later. Validation rules without validation text, inconsistent naming, and a data dictionary listing types with no reasons are the smaller deductions graders mention most often.
Get a IT163 Unit 3 example written to your instructions
Send the table specifications set out by the IT163 Unit 3 prompt, or the scenario it asks you to model, with the rubric and any naming convention your instructor prefers. Within 24-48h a working .accdb arrives, its tables typed and constrained and its data dictionary reasoned, built to that brief. First custom samples are free.
IT163 Unit 3 questions, answered
Why store a ZIP code as text when it is made of digits?
Because it is an identifier, not a quantity. Nobody adds or averages ZIP codes, and a Number field drops the leading zero in codes from the Northeast, turning 02134 into 2134. Short Text keeps every character exactly as entered and also accepts the nine-digit format with a hyphen. Phone numbers and part numbers follow the same logic.
What field size should a text field have?
Large enough for the longest realistic value and no larger. A two-letter state code gets 2, a ZIP code 10, a business name perhaps 60. Leaving every text field at the 255 default works technically, but graders read it as a sign that sizes were never considered, and oversized fields invite bad data such as full addresses typed into a city field.
Do I enter data before or after setting validation rules?
After, in most cases. Rules set on a table that already holds records trigger a check against existing data, and Access may warn that some records break the new rule. Entering sample records once properties are in place means the validation actually runs on every entry, which also gives you test evidence to mention in the design write-up.