一.
select * from baec_file where bacti='1'order by baec01;
select baec02,REPLACE(baec02,'白班','A班') from baec_file where bacti='1';
---对于没有sql无撤回功能,一定要先查出要替换的记录数,确认无误再执行替换
update baec_file
set baec02=REPLACE(baec02,'晚班','B班')
where bacti='1' ;
二.
select * from qcs_file as of timestamp sysdate-1/24 where qcs01='320-KT21121500' ----1/24表示过去的一小时内,这个sql针对单张表