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創建測試用表，DBA經常用到，通常都是基于dba_objects來創建的比較多。本文根據Tom大師的big_table進行了整理，供大家參考。

一、基于Oracle 10g下的big_table

--==============================================

-- Create a test table for Oracle 10g

-- File : cr_big_tb_10g.sql

-- Author : Robinson

-- Blog :

--==============================================

prompt

prompt Create a big table from all_objects

prompt ======================================

CREATE TABLE big_table

AS

SELECT ROWNUM id, a.*

FROM all_objects a

WHERE 1=0;

prompt

prompt Modify table to nologgming mode

prompt ==========================

ALTER TABLE big_table NOLOGGING;

prompt

prompt Please input rows number to fill into big_table

prompt ============================================

DECLARE

l_cnt NUMBER;

l_rows NUMBER := &1;

BEGIN

INSERT /*+ append */

INTO big_table

SELECT rownum, a.*

FROM all_objects a;

l_cnt := SQL%ROWCOUNT;

COMMIT;

WHILE (l_cnt < l_rows)

LOOP

INSERT /*+ APPEND */

INTO big_table

SELECT rownum + l_cnt

,owner

,object_name

,subobject_name

,object_id

,data_object_id

,object_type

,created

,last_ddl_time

,TIMESTAMP

,status

,temporary

,generated

,secondary

FROM big_table

WHERE rownum <= l_rows - l_cnt;

l_cnt := l_cnt + SQL%ROWCOUNT;

COMMIT;

END LOOP;

END;

/

prompt

prompt Add primary key for big table

prompt =====================================

ALTER TABLE big_table ADD CONSTRAINT

big_table_pk PRIMARY KEY (id);

prompt

prompt Gather statistics for big_table

prompt =====================================

BEGIN

dbms_stats.gather_table_stats(ownname => USER,

tabname => 'BIG_TABLE',

method_opt => 'for all indexed columns',

cascade => TRUE);

END;

/

prompt

prompt check total rows for big_table

prompt ====================================

SELECT COUNT(*)

FROM big_table;

二、基于Oracle 11g下的big_table

--==============================================

-- Create a test table for Oracle 11g

-- File : cr_big_tb_11g.sql

-- Author : Robinson

-- Blog :

--==============================================

prompt

prompt Create a big table from all_objects

prompt ======================================

CREATE TABLE big_table

AS

SELECT ROWNUM id, a.*

FROM all_objects a

WHERE 1=0;

prompt

prompt Modify table to nologgming mode

prompt ==========================

ALTER TABLE big_table NOLOGGING;

prompt

prompt Please input rows number to fill into big_table

prompt ============================================

DECLARE

l_cnt NUMBER;

l_rows NUMBER := &1;

BEGIN

INSERT /*+ append */

INTO big_table

SELECT rownum, a.*

FROM all_objects a;

l_cnt := SQL%ROWCOUNT;

COMMIT;

WHILE (l_cnt < l_rows)

LOOP

INSERT /*+ APPEND */

INTO big_table

SELECT rownum + l_cnt

,owner

,object_name

,subobject_name

,object_id

,data_object_id

,object_type

,created

,last_ddl_time

,TIMESTAMP

,status

,temporary

,generated

,secondary

,namespace

,edition_name

FROM big_table

WHERE rownum <= l_rows - l_cnt;

l_cnt := l_cnt + SQL%ROWCOUNT;

COMMIT;

END LOOP;

END;

/

prompt

prompt Add primary key for big table

prompt =====================================

ALTER TABLE big_table ADD CONSTRAINT

big_table_pk PRIMARY KEY (id);

prompt

prompt Gather statistics for big_table

prompt =====================================

BEGIN

dbms_stats.gather_table_stats(ownname => USER,

tabname => 'BIG_TABLE',

method_opt => 'for all indexed columns',

cascade => TRUE);

END;

/

prompt

prompt check total rows for big_table

prompt ====================================

SELECT COUNT(*)

FROM big_table;

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