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Hibernate / Hibernate interview questions

@UniqueConstraint and @Column Unique attribute.

@UniqueConstraint and unique attribute of @Column instructs schema/DDL generation tool to generate the corresponding unique constraints however using that attributes on POJO doesn't implement constraints itself. 

@Entity
@Table(uniqueConstraints=
           @UniqueConstraint(columnNames = {"email", "empl_id"})) 
public class EntityClass {
    ...
}


@Entity
@Table(name="USER_TABLE") 
public class User{
  @Id
  @Column(name = "ID")
  private String id;

  @Column(name = "SSN", unique=true)
  private String ssnumber;

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Hibernate interview questions II

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