How to create an AutoNumber field value in Access?

问题

I'm trying the following:

CREATE TABLE Table1
(
    RecordNo autonumber, --error here!
    PersonId varchar(50),
    ...
)

But, there is an error.
How can I build the correct query in Access?

回答1:

According to SQL Auto Increment a Field:

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.

回答2:

The order might be important

CREATE TABLE Persons
( pkObject AUTOINCREMENT PRIMARY KEY)

If I try PRIMARY KEY AUTOINCREMENT as suggested, it gets upset (MSAccess 2010).

回答3:

Method 1:

Open table in design view
Make a field named "ID" or whatever the field will be that will have the Auto Increment
Put "AutoNumber" under DataType

Method 2:

Make a new table
Close the table and save it
When it asks if you want a primary key click ok
Open the table in Design View
Edit the new field to whatever name you like

回答4:

When using ancient DAO 3.60 and Jet 4.0 with Access 2003 files, Eugene Yokota'a syntax did not work. I found that COUNTER keyword will do the trick:

CREATE TABLE tablename(id COUNTER, Name Text (30))

Thanks to this post: http://www.vbforums.com/showthread.php?234335

来源：https://stackoverflow.com/questions/1072932/how-to-create-an-autonumber-field-value-in-access

标签

ms-access

autonumber