| 标题 | Oracle 测试常用表BIG_TABLE |
| 范文 | 创建测试用表，DBA经常用到，通常都是基于dba_objects来创建的比较多。本文根据Tom大师的big_table进行了整理，供大家参考。 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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