查询在SQL Server CE中创建自动增量列，C＃

Question

What is the query in SQL Server CE to create a column that is auto-increment? SQL Server CE中的查询是什么创建自动增量的列？

Tried with IDENTITY(1,1), PRIMARY KEY .. No luck yet :( 试过IDENTITY(1,1), PRIMARY KEY ..还没有运气:(

Please guide me, thanks in advance ! 请指导我，提前谢谢！

Answer 1

CREATE TABLE MyCustomers 
    (
      CustID int IDENTITY (100,1) PRIMARY KEY
     ,CompanyName nvarchar (50)
    )

I think your issue is the ',' after the identity clause - remove it and it should work. 我认为你的问题是'，'在身份条款之后 - 删除它，它应该工作。

Answer 2

If you tried with 如果你试过

IDENTITY(1,1), PRIMARY KEY

try dropping the comma: 尝试删除逗号：

IDENTITY(1,1) PRIMARY KEY

Also, please note that: 此外，请注意：

a table can have at most one identity column 一个表最多只能有一个标识列
you can specify PRIMARY KEY on a column the first time you create the table. 您可以在第一次创建表时在列上指定PRIMARY KEY 。 If you are doing an ALTER TABLE [...] ADD COLUMN , this is invalid 如果您正在执行ALTER TABLE [...] ADD COLUMN ，则此操作无效