Tables

Tables

A table is a collection of data about a specific topic, such as students or contacts. Using a separate table for each topic means that you store that data only once, which makes your database more efficient, and reduces data-entry errors.

Tables organize data into columns (called fields) and rows (called records).

Create a Table from scratch in Design view

If you haven't already done so, switch to the Database Window You can press F11 to switch to the Database window from any other window.
Double-Click on "Create table in Design view".
(DESIGN VIEW)
Define each of the fields in your table.

Primary Key

One or more fields (columns) whose value or values uniquely identify each record in a table. A primary key does not allow Null values and must always have a unique value. A primary key is used to relate a table to foreign keys in other tables.
NOTE: You do not have to define a primary key, but it's usually a good idea. If you don't define a primary key, Microsoft Access asks you if you would like to create one when you save the table.
For our tutorial, make the Soc Sec # field the primary key, meaning that every student has a social security number and no 2 are the same.
- To do this, simply select the Soc Sec # field and select the primary key button
- After you do this, Save the table

Switching Views

To switch views form the datasheet (spreadsheet view) and the design view, simply click the button in the top-left hand corner of the Access program.

Datasheet View Design View

Displays the view, which allows you to enter raw data into your database table.
Displays the view, which allows you to enter fields, data-types, and descriptions into your database table.

Entering Data

Click on the Datasheet View and simply start "chugging" away by entering the data into each field. NOTE: Before starting a new record, the Soc Sec # field must have something in it, because it is the Primary Key. If you did not set a Primary Key then it is OK.

Manipulating Data

Adding a new row
- Simply drop down to a new line and enter the information
Updating a record
- Simply select the record and field you want to update, and change its data with what you want
Deleting a record
- Simply select the entire row and hit the Delete Key on the keyboard

Advanced Table Features w/Microsoft Access

Assigning a field a specific set of characters
- Example) Making a Social Security Number only allows 9 characters.
  1. Switch to Design View
  2. Select the field you want to alter
  3. At the bottom select the General Tab
  4. Select Field Size
  5. Enter the number of characters you want this field to have
Formatting a field to look a specific way (HINT: You do not need to assign a field a specific set of characters if you do this)
- Example) Formatting Phone Number w/ Area Code (xxx) xxx-xxxx
  1. Switch to Design View
  2. Select the field you want to format
  3. At the bottom select the General Tab
  4. Select Input Mask Box and click on the ... button at the right.
  5. Select Phone Number option
  6. Click on Next
  7. Leave !(999) 000-0000 the way it is. This is a default.
  8. Click Next
  9. Select which option you want it to look like
  10. Click Next
  11. Click Finish
Selecting a value from a dropdown box with a set of values that you assign to it. This saves you from typing it in each time
- Example)Choosing a city that is either Auburn, Bay City, Flint, Midland, or Saginaw
  1. Switch to Design View
  2. Select the field you want to alter (City)
  3. At the bottom select the Lookup Tab
  4. In the Display Control box, select Combo Box
  5. Under Row Source Type, select Value List
  6. Under Row Source, enter the values how you want them displayed, separated by a comma. (Auburn, Bay City, Flint, Midland, Saginaw)
    - NOTE:This will not alphabetize them for you, so you will have to do that yourself. It should look something like this:
  7. Select in the datasheet view and you should see the change when you go to the city field.

Datasheet View	Design View
Displays the view, which allows you to enter raw data into your database table.	Displays the view, which allows you to enter fields, data-types, and descriptions into your database table.