Wednesday 26 February 2014

Sifat Medan

      Sifat medan ialah satu lagi fungsi yang terdapat pada jadualMS di Acces Design View FUNGSINYA     adalah untuk menetapkan ciri-ciri bidang tambahan yang mengawal saiz medan text dengan mengawal  saiz medan text dengan menetapkan saiz field.

         Senarai field propetis(Sifat Medan)

Sifat Medan (field properties)

Keterangan
Format
Text : Customize the way that the field appears by default when it is displayed or   
         Printed.
Memo
Number : More information about property settings for these data types:
                 Show text.
Date/Time
Currency           : ShowNumber
AutoNumber
Yes/No : ShowDate/Time
Hyperlink : Yes/ No
Caption

field size
•             Tex Text
•             Nu  Number
•             Au  AutoNumber             Set the maximum size for data stored as a Text, Number, or AutoNumber data type.
More information about property settings for these data types:
 Text
 Number
 AutoNumber
 TIP   For best performance, always specify the smallest sufficient Field Size.
Decimal places
Number
Currency
Specify the number of decimal places to use when displaying numbers.
Input mask
Text
Number
Date/Time
Currency
Display editing characters to guide data entry.
Default value
Text : Automatically assign the specifield values to a field when a new record is added.
Memo
Number
Date/Time
Currency
Yes/No
Hyperlink
Memo
Number
Date/Time
Currency
Yes/No
Hyperlink
Text : Supply an expression that must be true to add or change the value in this field.
Memo
Number
Date/Time
Currency
Yes/No
Hyperlink
validation text
Text : Enter text that appears when a value entered in this field violates the expression in the Validation Rule
          Box.                            
Memo
Number
Date/Time
Currency
Yes/No
Hyperlink.
text align
All data types :  Specify the default alignment of text within a control.
except
Attachment
smart tags
Text :  Attach a smart tag to the field.
Memo
Number
Date/Time
Currency
AutoNumber
Hyperlink
Required
All data types except :  Require that this field must contain a value in every record.
AutoNumber
Indexed
Text  : Speed up read access to data in this field by creating and using an index.
Memo :  NOTE   The Memo and Hyperlink fields support indexes on only the first 255 characters of the field.
Number
Date/Time :  IMPORTANT   An index on a field causes append, delete, and update operations to take longer,     
                   because the index must be updated to reflect any changes.
Currency
AutoNumber :  For more information about indexes, refer to the See Also section.
Yes/No
Hyperlink

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