Mysql单表备份有很多方式，备报错对于数据量比较大的份表表，可以使用mysqldump

小表通常使用如下语句就行了。备报错

create table A as select * from B

在一次备份中出现如下错误。份表

mysql> create tables deptmember_bak as select * from deptmember;

ERROR 1064 (42000): You have 备报错an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near tables deptmember_bak as select * from deptmember at line 1

查询官方资料，原因是份表MySQL 5.6.7及更高的版本，开启了enforce_gtid_consistency=true 功能导致的备报错，亿华云MySQL官方解释说当启用 enforce_gtid_consistency 功能的份表时候，MySQL只允许能够保障事务安全，备报错并且能够被日志记录的份表SQL语句被执行，像create table … select 和 create temporarytable语句，备报错以及同时更新事务表和非事务表的份表SQL语句或事务都不允许执行,所以默认关闭掉，需要开启时再启用

查看环境enforce_gtid_consistency参数为开启状态。备报错

mysql> show variables like ENFORCE_GTID_CONSISTENCY;

+--------------------------+-------+

| Variable_name | Value |

+--------------------------+-------+

| enforce_gtid_consistency | ON |

+--------------------------+-------+

1 row in set (0.01 sec)

下面提供了2种方案，亿华云计算份表可以根据情况自由选择

一、备报错方法一：修改数据库参数

解决办法关闭GTID模式

mysql配置my.cnf里面修改参数如下

gtid_mode = OFF

enforce_gtid_consistency = OFF

重启mysql再次查看已经生效，再次执行备份就不会报错了

mysql> show variables like %gtid_mode%;

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| gtid_mode | OFF |

+---------------+-------+

1 row in set (0.01 sec)

mysql> show variables like %enforce_gtid_consistency%;

+--------------------------+-------+

| Variable_name | Value |

+--------------------------+-------+

| enforce_gtid_consistency | OFF |

+--------------------------+-------+

1 row in set (0.01 sec)

二、方法二：分步操作

方法二采用先复制目标表结构，然后插入数据的方式，这种方法的好处是不用重启数据库

mysql> create table deptmember_bak like deptmember;

Query OK, 0 rows affected (0.11 sec)

mysql> insert into deptmember_bak select * from deptmember;

Query OK, 4 rows affected (0.01 sec)

Records: 4 Duplicates: 0 Warnings: 0