Question

Designer the common data type used in Access
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Answer 1

Answer:

Fields in a Microsoft Access database can be of many different data types. Access supports different kinds of text, numbers, dates and some more special data types. This document will describe each data type and note which versions of Microsoft Access support it.

Textual types

Text

The Text data type is used for short text fields of limited length, and can contain up to 255 characters.

Memo

A Memo field is a virtually unlimited text field. It can store up to 1GB of text.

Microsoft Access supports text in a variety of languages and alphabets. Access 97 supported multiple code pages in the same document. This worked great in most cases, but caused problems when columns contained text in different alphabets. Therefore Microsoft switched to the Unicode character encoding in Access 2000. MDB Viewer automatically supports all encodings used in Access.

Explanation:

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Answer 2

Overview

Data types can seem confusing for example, if a field's data type is Text, it can store data that consists of either text or numerical characters. But a field whose data type is Number can store only numerical data. So, you have to know what properties are used with each data type.

A field's data type determines many other important field qualities, such as the following:

Which formats can be used with the field.

The maximum size of a field value.

How the field can be used in expressions.

Whether the field can be indexed.

A field's data type can be predefined or you will select a data type depending on how you create the new field. For example, if you create a field from the Datasheet view and:

Use an existing field from another table, the data type is already defined in the template or in the other table.

Enter data in a blank column (or field), Access assigns a data type to the field based on the values that you enter or you can assign the data type and format for the field.

On the Modify Fields tab, in the Fields & Columns group, click Add Fields, Access displays a list of data types that you can select from.