创建唯一索引
@Entity
@Table(name="ebooks",uniqueConstraints ={@UniqueConstraint(columnNames="name")})创建联合索引
@Entity
@Table(name="ebooks",uniqueConstraints ={@UniqueConstraint(columnNames={"name", "writer"})})创建唯一索引
@Entity
@Table(name="ebooks",uniqueConstraints ={@UniqueConstraint(columnNames="name")})创建联合索引
@Entity
@Table(name="ebooks",uniqueConstraints ={@UniqueConstraint(columnNames={"name", "writer"})})