mysql、sqlyog
登录mysql，在test数据库新建一个表chengshi: Create Table CREATE TABLE `chengshi` ( `id` int(11) NOT NULL AUTO_INCREMENT, `shengfen` varchar(10) DEFAULT NULL, `chengshi` varchar(10) DEFAULT NULL, `shijian` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8
在表中输入数据：insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('1','河南','安阳','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('2','河南','郑州','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('3','河南','洛阳','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('4','河南','漯河','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('5','河南','新乡','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('6','河南','濮阳','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('7','河南','焦作','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('8','河南','鹤壁','2019-03-05 10:14:27');insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`) values('9','河南','开封','2019-03-05 10:14:27');
把表的数据备份c:\chengshi.sql文件中：SELECT * INTO OUTFILE 'c:/chengshi.sql' FROM chengshi
这个文件备份的表的数据，把备份的数据恢复的 表中。
备份的主键和表的主键重复，所有替换数据：LOAD DATA INFILE 'c:/chengshi.sql' REPLACE INTO TABLE chengshi
备份的主键和表的主键重复，把没有的数据恢复到表中：DELETE FROM chengshi WHERE id>=3;LOAD DATA INFILE 'c:/chengshi.sql' IGNORE INTO TABLE chengshi;
查询所有数据：SELECT * FROM chengshi;