mysql5.6设置sql_mode方法详解

作者：简简单单 2013-11-02

首先登录mysql终端

代码如下	复制代码
mysql -u xxx -pxxxxx

查看当前mysql的sql_mode

代码如下	复制代码
mysql> select @@sql_mode; +--------------------------------------------+ \| @@sql_mode \| +--------------------------------------------+ \| STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION \|

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

将mysql的sql_mode 设为 MYSQL40 也就是 NO_FIELD_OPTIONS,HIGH_NOT_PRECEDENCE

代码如下

复制代码

mysql> SET sql_mode=`NO_FIELD_OPTIONS,HIGH_NOT_PRECEDENCE`;
Query OK, 0 rows affected (0.00 sec)

mysql> select @@sql_mode;
+--------------------------------------+
| @@sql_mode |
+--------------------------------------+
| NO_FIELD_OPTIONS,HIGH_NOT_PRECEDENCE |
+--------------------------------------+
1 row in set (0.00 sec)

需要注意的是上面的修改 sql_mode 只是会话级别的，只影响当前会话,退出终端后既失效

下面这个才是设置全局级别的变量，适用于所有会话,但仅限于本次mysql进程,下次重启还要重新设置

代码如下	复制代码
set global sql_mode=`NO_FIELD_OPTIONS,HIGH_NOT_PRECEDENCE`

详细用法

代码如下	复制代码
SET [GLOBAL\|SESSION] sql_mode='modes'

每次启动自动设置sql_mode可以在启动脚本里面加上

代码如下	复制代码
mysql --sql-mode="NO_FIELD_OPTIONS,HIGH_NOT_PRECEDENCE"

sql_mode默认设置问题 .

编译并配置完MySQL5.6版本，导入之前在MySQL5.5中正常运行的数据库却发生错误，原来从MySQL5.6版本开始，在执行mysql_install_db命令时（该命令一般在编译完mysql后运行并对数据库进行初始配置)会将默认的一个my.cnf文件写入到安装路径中(CentOS下默认安装路径为/usr/local/mysql/），其包含的信息如下：

代码如下

复制代码

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

[mysqld]

# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M

# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin

# These are commonly set, remove the # and set as required.
# basedir = .....
# datadir = .....
# port = .....
# server_id = .....
# socket = .....

# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M

# 作者按: 见这里的配置
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

mysql5.6设置sql_mode方法详解

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