Microsoft Access Autonumber Field Size Property Access

There may be times when you would rather have Access generate random, rather than sequential, numbers in an AutoNumber field. For example, if you print a list of members whose membership numbers are generated sequentially, it may appear as if some of the records are missing when, in fact, those members have simply left the organization and their records archived. With random numbers, none of the 'missing' members would be noticed. To have Access randomly generate numbers that are unique to a table, follow these steps: • Open the table in Design view.

Overview: Changing Initial Value of an AutoNumber Field In order to force Microsoft Access to number an AutoNumber field with a number you choose, follow these general steps below: For a new table that contains no records, you can change the starting value of an AutoNumber field that has its NewValues property set to Increment to a number other. 10+ tips for designing flexible and efficient Access tables The way you build your Microsoft Access tables makes all the difference in the world in terms of performance and reliability.

• Click in the AutoNumber field row. • In the Properties window, click in New Values property text box. • Click Random ( Figure A). Figure A The AutoNumber field will now be populated with random numbers as shown in Figure B.

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According to: CREATE TABLE Persons ( P_Id PRIMARY KEY AUTOINCREMENT, LastName varchar(255) NOT NULL, FirstName varchar(255), Address varchar(255), City varchar(255) ) The MS Access uses the AUTOINCREMENT keyword to perform an auto-increment feature. By default, the starting value for AUTOINCREMENT is 1, and it will increment by 1 for each new record.

To specify that the ' P_Id' column should start at value 10 and increment by 5, change the autoincrement to AUTOINCREMENT(10,5). Synonyms for AUTOINCREMENT include COUNTER and IDENTITY. Using IDENTITY the makes a lot of sense because it matched the @IDENTITY variable which returns the last used autonumber value.