第一章:写简单的sql语句 SQL> alter user scott account unlock; SQL> alter user scott identified by tiger; SQL> conn scott tiger 1 使用算术操作符 SELECT last name salary salary + 300 FROM employees; 7 使用interval CREATE TABLE warranty prod id number warranty t
Written by networking veteran with 20 years of experience, Network Warrior provides a thorough and practical introduction to the entire network infrastructure, from cabling to the routers. What you need to learn to pass a Cisco certification exam su