GET_DDL提取建表语句：ddl

创建对象的语句就是了

提取表

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SQL> select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') FROM DUAL;

CREATE TABLE "SCOTT"."EMP"

   (    "EMPNO" NUMBER(4,0),

        "ENAME" VARCHAR2(10),

        "JOB" VARCHAR2(9),

        "MGR" NUMBER(4,0),

        "HIREDATE" DATE,

        "SAL" NUMBER(7,2),

        "COMM" NUMBER(7,2),

        "DEPTNO" NUMBER(2,0),

         CONSTRAINT "PK_EMP" PRIMARY KEY ("EMPNO")

USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS

  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645

  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1

  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)

  TABLESPACE "USERS"  ENABLE,

         CONSTRAINT "FK_DEPTNO" FOREIGN KEY ("DEPTNO")

          REFERENCES "SCOTT"."DEPT" ("DEPTNO") ENABLE

   ) SEGMENT CREATION IMMEDIATE

  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255

 NOCOMPRESS LOGGING

  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645

  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1

  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)

  TABLESPACE "USERS"

 

---有没有感觉太乱了，逗---

--如何简化呢？http://blog.itpub.net/26390465/viewspace-1764802/

 

--输出信息采用缩排或换行格式化

EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'PRETTY', TRUE);
--确保每个语句都带分号
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'SQLTERMINATOR', TRUE);

--关闭表索引、外键等关联（后面单独生成）

EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'CONSTRAINTS', FALSE);
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'REF_CONSTRAINTS', FALSE);
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'CONSTRAINTS_AS_ALTER', FALSE);
--关闭存储、表空间属性
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'STORAGE', FALSE);
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'TABLESPACE', FALSE);
--关闭创建表的PCTFREE、NOCOMPRESS等属性
EXEC DBMS_METADATA.set_transform_param(DBMS_METADATA.session_transform, 'SEGMENT_ATTRIBUTES', FALSE);

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*******查询表请使用：关闭创建表的PCTFREE、NOCOMPRESS等属性+换行格式化+分号

 select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') FROM DUAL;

 

*****查询索引  ==没啥好办法，上方：换行+分号吧

select dbms_metadata.get_ddl('SEQUENCE','SYSTEM_GRANT','SYS') FROM DUAL;

 

*****查询索引的元数据：

select dbms_metadata.get_ddl('INDEX','EMP_EMAIL_UK','SCOTT')||';' FROM DUAL;

 

*****表空间的元数据：

select dbms_metadata.get_ddl('TABLESPACE','UNDO2') from dual;

 

 

**效果：

SQL> select dbms_metadata.get_ddl('TABLE','EMP','SCOTT') FROM DUAL;

DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT')

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

CREATE TABLE "SCOTT"."EMP"    (    "EMPNO" NUMBER(4,0),         "ENAME" VARCHAR2(10),         "JOB" VARCHAR2(9),         "MGR" NUMBER(4,0),         "HIREDATE" DATE,         "SAL" NUMBER(7,2),         "COMM" NUMBER(7,2),         "DEPTNO" NUMBER(2,0)    ) ;