摘要:
#####setting 1create table t as select * from all_objects where 1 =2; ###.模拟逐行提交的情况,注意观察执行时间DECLAREBEGINFOR cur IN (SELECT * FROM t_ref) LOOPINSERT IN 阅读全文
摘要:
The ASH report shows tables and data files with wait event 'utl_file I/O': CHANGES No changes. CAUSE ASH reports retrieve data from the dba_hist_activ 阅读全文