写出sql语句,查询所有年龄大于20岁的员工 | ||
2 | select * from employee where age>20; | |
3 | 写出sql语句,查询所有年龄大于等于22小于25的女性员工 | |
4 | select * from employee where age between 22 and 25 and sex='女'; | |
5 | 写出sql语句,统计男女员工各有多少名 | |
6 | select Sex,count(*) as count from employee group by Sex; | |
7 | 写出sql语句,按照年龄降序获取员工信息 | |
8 | select * from emloyee where age index; | |
9 | 写出sql语句,获取员工中哪个姓名具有重名现象 | |
10 | select Name,count(*) as count from employee group by Name having count>1; | |
11 | 写出sql语句,查询所有姓张的员工 | |
12 | select * from employee where Name like '张%'; | |
13 | 写出sql语句,查询住址为北京的前3条记录 | |
14 | select * from employee where Address='北京' limit 3; | |
15 | 写出sql语句,查询员工总数 | |
16 | select count(*) from employee; | |
17 | 写出sql语句,向表中插入一条记录 | |
18 | insert into employee | |
19 | values("周一",“男”,“25”,“张家口”); | |
20 | 写出sql语句,修改员工张四的住址为南京 | |
21 | update employee set Address='南京' where Name='张四'; | |
22 | 写出sql语句,删除年龄大于24岁的女员工 | |
23 | delete from employee where Sex='女' and Age>24; java第二十四课. · 7719ec3 · WL—code/WL仓库 - Gitee.com |