ACCESS is a relational database management system. Relational databases allow you to organize your data into tables Each table focuses on a specific topic; the various tables can then be linked to each other for inquiry and reporting purposes. What is Access?
Microsoft Access uses four objects to create a Database: Tables Queries Forms Reports Database Objects
A table is the basic element of a Database and contains the data entered by users. Each row (or record) contains information about a particular item (e.g., an employee). The record is made up of several fields; each field contains one piece of information relating to the item (e.g., employee's name, address, phone, etc.). Table
NameAddressTelephone No. Martha12 Main St. Walsenburg, CO 907-3621-2121 John34 3 rd St. Walsenburg, CO 977-3681-6121
A query extracts selected data from a table (or another query) and presents it in spreadsheet format. Query
A form is a graphical template based on a table (or query). It is used to enter new data into the database or display existing data. Form
A report extracts selected data from a table (or query) and formats it for printing. Report
A table is a database object used to store, organize and view data. All other objects are based on the data stored in tables. Tables are comprised of: Fields - represented by columns Records - stored as rows. What is a Table?
Sets a maximum size for data Varies according to Data Type: Field Size
Controls the way data is entered; frequently used for telephone numbers, postal codes, SSN #’s, date/time fields. ACCESS offers a Wizard for text and date/time data types. Input Mask
You specify text for the label attached to a field; Will be used as the column heading when displaying tables, queries and reports. The default value is Field Name. Caption
Specifies a value that will be automatically entered when you create a new record. Default Value
Input Mask Characters CharacterDescription 0Digit (0 to 9, entry required, plus [+] and minus [–] signs not allowed). 9Digit or space (entry not required, plus and minus signs not allowed). #Digit or space (entry not required; spaces are displayed as blanks while in Edit mode, but blanks are removed when data is saved; plus and minus signs allowed). LLetter (A to Z, entry required). ?Letter (A to Z, entry optional). ALetter or digit (entry required). aLetter or digit (entry optional). &Any character or a space (entry required). CAny character or a space (entry optional).
Primary Key The primary key of a relational table uniquely identifies each record in the table. It can either be a normal attribute that is guaranteed to be unique (such as Social Security Number in a table with no more than one record per person.