H2使用random（）选择LIMIT和OFFSET

Question

In h2 dbms I have a table

CREATE TABLE sometable
( ID INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
  somevalue INTEGER)

And some data

INSERT INTO sometable(somevalue) 
VALUES (1), (2), (3), (4), (5);

When I SELECT somevalue FROM sometable LIMIT 1 OFFSET 2 it works . Why if I want to select random row the SELECT somevalue FROM sometable LIMIT 1 OFFSET (RANDOM()*4) doesn't work ?

Answer 1

You can do something like this:

create table test(
  id bigint auto_increment primary key, 
  name varchar(255));

insert into test 
select x, 'Hello ' || x from system_range(50, 1200);

select * from test t, system_range(1, 100) range
where t.id = x * (select max(id)-min(id) from test) / 100 + 
(select min(id) from test);

Source