创建oracle测试表

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;