摘要: -- oracle select substr(md5(key_id),1,1) as flag ,count(1) as cnt from ( select 1 as key_id union all select 2 as key_id union all select 3 as key_id 阅读全文
posted @ 2020-03-31 22:33 chenzechao 阅读(417) 评论(0) 推荐(0)