auto increment ID in H2 database

问题

Is there a way to have an auto_incrementing BIGINT ID for a table. It can be defined like so

id bigint auto_increment

but that has no effect (it does not increment automatically). I would like to insert all fields but the ID field - the ID field should be provided by the DBMS. Or do I need to call something to increment the ID counter?

回答1:

It works for me. JDBC URL: jdbc:h2:~/temp/test2

drop table test;
create table test(id bigint auto_increment, name varchar(255));
insert into test(name) values('hello');
insert into test(name) values('world');
select * from test; 

result:

ID  NAME  
1   hello
2   world

回答2:

IDENTITY

The modern approach uses the IDENTITY type, for automatically generating an incrementing 64-bit long integer.

This single-word syntax used in H2 is an abbreviated variation of GENERATED … AS IDENTITY defined in the SQL:2003 standard. See summary in PDF document SQL:2003 Has Been Published. Other databases are implementing this, such as Postgres.

CREATE TABLE event_ ( 
    pkey_ IDENTITY NOT NULL PRIMARY KEY ,  -- ⬅ `identity` = auto-incrementing long integer.
    name_ VARCHAR NOT NULL ,
    start_ TIMESTAMP NOT NULL , 
    stop_ TIMESTAMP NOT NULL 
) ;

回答3:

Very simple:

id int auto_increment primary key

H2 will create Sequence object automatically

回答4:

You can also use default:

create table if not exists my(id int auto_increment primary key,s text);
insert into my values(default,'foo');

回答5:

id bigint(size) zerofill not null auto_increment,

来源：https://stackoverflow.com/questions/9353167/auto-increment-id-in-h2-database