/etc/sysconfig/iptables
或/etc/iptables/rules.v4
,用于定义防火墙规则。@Entity
、@Table
、@Column
等注解来设置标签和注解。以下是一个示例:,,``java,import javax.persistence.*;,,@Entity,@Table(name = "users"),public class User {, , @Id, @GeneratedValue(strategy = GenerationType.IDENTITY), private Long id;, , @Column(name = "username", nullable = false, unique = true), private String username;, , @Column(name = "password", nullable = false), private String password;, , // getters and setters,},
`,,在这个示例中,
@Entity注解表示这是一个JPA实体类,
@Table注解指定了对应的数据库表名,
@Id和
@GeneratedValue注解用于标识主键及其生成策略,
@Column`注解则用于定义列的详细信息。sql,TRUNCATE TABLE table_name PARTITION (partition_name);,
``,,这条命令会清空指定分区内的所有数据,但保留表结构和索引。Powered By Z-BlogPHP 1.7.3