摘要:
10.16 to_char函数的功能是将数值型或者日期型转化为字符型 select * from emp where rownum<=5; oracle行数,条件组合要加and,mysql是limit 英文日期条件查询select * from 表名 where to_char(DATE_TRAVE 阅读全文
摘要:
2-1启用scott用户alter user username account unlock #lock锁定 unlock解锁 account账号例:alter user scott account unlockconn scoot/tiger进入表select table_name from us 阅读全文