摘要: 1.分析表 begin dbms_stats.gather_table_stats ( ownname => 'TEST', tabname => 'STUDENT', estimate_percent => dbms_stats.AUTO_SAMPLE_SIZE, degree => 4, cas 阅读全文
posted @ 2017-04-20 21:07 Mojiao 阅读(4450) 评论(0) 推荐(0) 编辑