124.Oracle数据库SQL开发之 数据库对象——查看对象类型

124.Oracle数据库SQL开发之 数据库对象——查看对象类型

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可以使用DESCRIBE命令可以用来获得对象类型的信息。

object_user@PDB1> describe t_address;

 Name                                                           Null?  Type

 ------------------------------------------------------------- ------------------------------------

 STREET                                                                  VARCHAR2(15)

 CITY                                                                         VARCHAR2(15)

 STATE                                                                       CHAR(2)

 ZIP                                                                  VARCHAR2(5)

object_user@PDB1> describe t_person;

 Name                                                           Null?  Type

 ------------------------------------------------------------- ------------------------------------

 ID                                                                    NUMBER(38)

 FIRST_NAME                                                         VARCHAR2(10)

 LAST_NAME                                                          VARCHAR2(10)

 DOB                                                                         DATE

 PHONE                                                                    VARCHAR2(12)

 ADDRESS                                                                T_ADDRESS

可以设置SET DESCRIBE DEPTH可以设置DESCRIBE显示信息的深度。

object_user@PDB1> set describe depth 2

object_user@PDB1> describe t_person

 Name                                                           Null?  Type

 ------------------------------------------------------------- ------------------------------------

 ID                                                                    NUMBER(38)

 FIRST_NAME                                                         VARCHAR2(10)

 LAST_NAME                                                          VARCHAR2(10)

 DOB                                                                         DATE

 PHONE                                                                    VARCHAR2(12)

 ADDRESS                                                                T_ADDRESS

  STREET                                                               VARCHAR2(15)

  CITY                                                          VARCHAR2(15)

  STATE                                                         CHAR(2)

  ZIP                                                                       VARCHAR2(5)