mysql을 통해 두 데이터베이스의 테이블 구조를 비교하는 방법

brew install caskroom/cask/mysql-connector-pythonbrew install caskroom/cask/mysql-utilities

mysqldiff --versionMySQL Utilities mysqldiff version 1.6.5 License type: GPLv2

mysqldiff --server1=root@host1 --server2=root@host2 --difftype=sql db1.table1:dbx.table3

--server1 指定数据库1--server2 指定数据库2

--difftype 差异信息的显示方式

--character-set 指定字符集--changes-for 用于指定要转换的对象，也就是生成差异的方向，默认是server1--changes-for=server1 表示server1要转为server2的结构，server2为主。--changes-for=server2 表示server2要转为server1的结构，server1为主。--skip-table-options 忽略AUTO_INCREMENT, ENGINE, CHARSET的差异。--version 查看版本

create database testa;create database testb;use testa;CREATE TABLE `tba` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(25) NOT NULL, `age` int(10) unsigned NOT NULL, `addtime` int(10) unsigned NOT NULL, PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1001 DEFAULT CHARSET=utf8;insert into `tba`(name,age,addtime) values('fdipzone',18,1514089188);use testb;CREATE TABLE `tbb` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(20) NOT NULL, `age` int(10) NOT NULL, `addtime` int(10) NOT NULL, PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;insert into `tbb`(name,age,addtime) values('fdipzone',19,1514089188);

mysqldiff --server1=root@localhost --server2=root@localhost --changes-for=server2 --difftype=sql testa.tba:testb.tbb;# server1 on localhost: ... connected.
# server2 on localhost: ... connected.
# Comparing testa.tba to testb.tbb                                 
[FAIL]
# Transformation for --changes-for=server2:#ALTER TABLE `testb`.`tbb` 
  CHANGE COLUMN addtime addtime int(10) unsigned NOT NULL, 
  CHANGE COLUMN age age int(10) unsigned NOT NULL, 
  CHANGE COLUMN name name varchar(25) NOT NULL, 
RENAME TO testa.tba 
, AUTO_INCREMENT=1002;# Compare failed. One or more differences found.

mysql> ALTER TABLE `testb`.`tbb` 
    ->   CHANGE COLUMN addtime addtime int(10) unsigned NOT NULL, 
    ->   CHANGE COLUMN age age int(10) unsigned NOT NULL, 
    ->   CHANGE COLUMN name name varchar(25) NOT NULL;
Query OK, 0 rows affected (0.03 sec)

mysqldiff --server1=root@localhost --server2=root@localhost --changes-for=server2 --difftype=sql testa.tba:testb.tbb;# server1 on localhost: ... connected.# server2 on localhost: ... connected.# Comparing testa.tba to testb.tbb                                
 [FAIL]# Transformation for --changes-for=server2:#ALTER TABLE `testb`.`tbb` 
RENAME TO testa.tba 
, AUTO_INCREMENT=1002;# Compare failed. One or more differences found.