By MOIRA Stephen
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Extra info for Databases with Access: Learning Made Simple
4 Select Design View 5 24 in the Data- Click OK Data types There are 10 different data types to choose from when setting up your table structures. The data types you will use most often are described here. Data Type Usage Size Notes Text Alphanumeric data up to 255 bytes Default data type Number Numeric data 1, 2, 4 or 8 bytes Date/Time Dates and times 8 bytes Date and time values for the years 100 through to 9999 Currency Monetary data 8 bytes Accurate to 4 decimal places and 15 digits to the left of the separator AutoNumber Unique long integer generated by Access for each new record 4 bytes Cannot be updated; useful for Primary Key fields Yes/No 1 bit Fields that contain one of two values – Yes/No, On/Off, True/False.
51 Using Datasheet view Once you have set up the structure of your table(s) and set the relationships, the next stage is data entry. The table should be displayed in Datasheet view rather than Design view for this. In Datasheet view, each column of the table is a field and each row is a record. Try entering some records into your table using your Christmas Card List database. 4 2 Display Tables Select and click Open 3 Basic steps 1 2 3 Open the database file. Display the Tables in the Database window.
One-To-One Both of the fields are primary keys or have unique indexes. In this relationship type, each record in the first table can have only one matching record in the second, and vice versa. One-to-one relationships are sometimes used to divide a table that has many fields, or to isolate some fields for security reasons. This type of relationship is not very common. Indeterminate Neither of the related fields are primary keys nor have unique indexes. A record in the first table can have many matching records in the second, and a record in the second can have several matching records in the first.