@Entity
@Table
public class Question {

@Id
private Long id;

@Column(nullable = true)
private String text;

@Column(nullable = true)
private String title;

}

create table question (
        id number(19,0) not null,
        text varchar2(50 char) null,
        title varchar2(10,0) null,
        primary key (id)
    );

@Entity
@Table
@Check(constraints = "TEXT IS NOT NULL OR TITLE IS NOT NULL")
public class Question {
...
}

create table question (
        id number(19,0) not null,
        text varchar2(50 char) null,
        title varchar2(10,0) null,
        primary key (id),
        check (TEXT IS NOT NULL OR TITLE IS NOT NULL)
    );

create table question (
        id number(19,0) not null,
        text varchar2(50 char) null,
        title varchar2(10,0) null,
        primary key (id),
        constraint check_title check(TEXT IS NOT NULL OR TITLE IS NOT NULL)
    );

@Entity
@Table
@Check(name = "check_title" constraints = "TEXT IS NOT NULL OR TITLE IS NOT NULL")
public class Question {
...
}