几条mysql命令
Select * from dept order by deptno desc limit 3,2;-- 从第三条记录往后取两条记录 创建一个序列 Create table sequence( seqid int primary key auto_increment,--seqin 会自动递增 seqname varchar(15) ) 函数 : now() 取现在时间: select now(); date
Select * from dept order by deptno desc limit 3,2;--从第三条记录往后取两条记录
创建一个序列
Create table sequence(
seqid int primary key auto_increment,--seqin会自动递增
seqname varchar(15)
)
函数:
now() –取现在时间:select now();
date_format()—时间函数:select date_format(now(),’%Y-%M-%D %H:%I:%S’)
select date_format(now(),’%Y-%m-%d %H:%I:%S’)
导出数据库:
命令格式
mysqldump -u用户名 -p 数据库名 > 数据库名.sql
范例:
mysqldump –u root -p abc > abc.sql
(导出数据库abc到abc.sql文件)
导入数据库:
命令格式
mysql -u用户名 -p 数据库名 数据库名.sql
范例:
mysql –u abc_f -p abc
(导入数据库abc从abc.sql文件)

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