2017年6月13日
oracle同义词是什么意思？
摘要： 相当于alias，比如把user1.table1 在user2中建一个同义词table1create synonym table1 for user1.table1;这样当我们在user2中查select * from table1 时就相当于查select * from user1.table1; 阅读全文
posted @ 2017-06-13 18:50 酸奶加绿茶 阅读(1169) 评论(0) 推荐(0)
10 Useeful Tips for Writing Effective Bash Scripts in Linux
摘要： 1.Always Use Comments in Scripts2.Make a Scripts exit When Fails Sometimes bash may continue to execute a script even when a certain command fails.thu 阅读全文
posted @ 2017-06-13 11:38 酸奶加绿茶 阅读(236) 评论(0) 推荐(0)