METADATA

DDL and stored procedures can be readily displayed from the data dictionary using the dbms_metadata function. You can punch individual objects or an entire Oracle schema with this potent tool. Its ease of usage is its best feature. Oracle will extract ready-to-use DDL if you simply execute dbms_metadata.get_ddl, supply the object names, and hit enter.

	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),
	SQL> set long 5000;
	SQL> /

	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),
		CONSTRAINT "PK_EMP" PRIMARY KEY ("EMPNO")

	DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT')
	--------------------------------------------------------------------------------
	USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
	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

	DBMS_METADATA.GET_DDL('TABLE','EMP','SCOTT')
	--------------------------------------------------------------------------------
	PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
	BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
	TABLESPACE "USERS"