电子科大数据库原理期末

㈠ 大学SQL数据库原理大题求好心人帮答下谢谢

1：select * from employees;

2：select * from employees t where t.employeeName like 'Back%';
3：select * from employees t where t.employeeName like 'P%' and t.daysOfHoliday < 3;
4：select * from employees t where t.workyears>5 or t.daysOfHoliday < 5;
5：select * from employees t where t.employeeName not like 'B%';

好好学习，不会的话，我可以教你，我以前也是屌丝，现在我什版么权都会了 。。