mac系统中搭建apache+mysql+php的开发环境，安装mysql后，登录报错：mac ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

，命令如下：

<span style="font-size: 14px;"><span style="color: #ff0000;">sudo</span> /usr/local/mysql/bin/mysqld_safe <span style="color: #999999;">--skip-grant-tables</span></span>

执行结果如下：

<span style="color: #800080;">2016</span>-<span style="color: #800080;">06</span>-12T08:<span style="color: #800080;">29</span>:<span style="color: #800080;">17</span>.6NZ mysqld_safe Logging to <span style="color: #800000;">‘</span><span style="color: #800000;">/usr/local/mysql/data/lyqdeMacBook-Pro.local.err</span><span style="color: #800000;">‘</span><span style="color: #000000;">.
</span><span style="color: #800080;">2016</span>-<span style="color: #800080;">06</span>-12T08:<span style="color: #800080;">29</span>:<span style="color: #800080;">17</span>.6NZ mysqld_safe Starting mysqld daemon with databases <span style="color: #0000ff;">from</span> /usr/local/mysql/data

第三步：不要关闭当前的终端窗口，新建一个终端窗口，输入如下命令，回车登录mysql

/usr/local/mysql/bin/mysql

登录后，看到欢迎信息：

<span style="color: #000000;">Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id </span><span style="color: #0000ff;">is</span> <span style="color: #800080;">37</span><span style="color: #000000;">
Server version: </span><span style="color: #800080;">5.7</span>.<span style="color: #800080;">13</span><span style="color: #000000;"> MySQL Community Server (GPL)

Copyright (c) </span><span style="color: #800080;">2000</span>, <span style="color: #800080;">2016</span>, Oracle and/<span style="color: #000000;">or its affiliates. All rights reserved.

Oracle </span><span style="color: #0000ff;">is</span> a registered trademark of Oracle Corporation and/<span style="color: #000000;">or its
affiliates. Other names may be trademarks of their respective
owners.

Type </span><span style="color: #800000;">‘</span><span style="color: #800000;">help;</span><span style="color: #800000;">‘</span> or <span style="color: #800000;">‘</span><span style="color: #800000;">h</span><span style="color: #800000;">‘</span> <span style="color: #0000ff;">for</span> help. Type <span style="color: #800000;">‘</span><span style="color: #800000;">c</span><span style="color: #800000;">‘</span><span style="color: #000000;"> to clear the current input statement.

mysql</span>> 

打开"mysql"这个数据库，SQL如下：

<span>mysql> </span>use mysql;

看到结果：

Reading table information <span style="color: #0000ff;">for</span><span style="color: #000000;"> completion of table and column names
You can turn off </span><span style="color: #0000ff;">this</span> feature to <span style="color: #0000ff;">get</span> a quicker startup with -<span style="color: #000000;">A

Database changed
mysql</span>> 

然后，更新root的密码，SQL如下：

mysql> update user <span style="color: #0000ff;">set</span> authentication_string=<span style="color: #ff0000;">password(‘root‘)</span> <span style="color: #0000ff;">where</span> Host=<span style="color: #800000;">‘</span><span style="color: #800000;">localhost</span><span style="color: #800000;">‘</span> and User=<span style="color: #800000;">‘</span><span style="color: #800000;">root</span><span style="color: #800000;">‘</span>;

注意：

①有的版本的mysql中，密码可能存储在password字段中，可以使用"describe user;"命令来查看下表结构再操作

②authentication_string的值一定通过password函数来计算(password(‘root‘))

 

执行结果如下：

Query OK, <span style="color: #800080;">1</span> row affected, <span style="color: #800080;">1</span> warning (<span style="color: #800080;">0.01</span><span style="color: #000000;"> sec)
Rows matched: </span><span style="color: #800080;">1</span>  Changed: <span style="color: #800080;">1</span>  Warnings: <span style="color: #800080;">1</span>

退出mysql（执行sql语句：exit)

最后一步：将mysqld_safe进程杀死，重启mysqld。

 

可能会遇到的问题

登录mysql

/usr/local/mysql/bin/mysql -uroot -proot

这个时候，如果执行查询之类的操作，比如执行"show databases;"，可能会有如下提示：

ERROR <span style="color: #800080;">1820</span> (HY000): You must reset your password <span style="color: #0000ff;">using</span> ALTER USER statement before executing <span style="color: #0000ff;">this</span> statement.

根据提示进行操作，输入如下SQL语句，这个语句的作用是修改root用户的口令为root：

mysql> alter user <span style="color: #800000;">‘</span><span style="color: #800000;">root</span><span style="color: #800000;">‘</span>@<span style="color: #800000;">‘</span><span style="color: #800000;">localhost</span><span style="color: #800000;">‘</span> identified by <span style="color: #800000;">‘</span><span style="color: #800000;">root</span><span style="color: #800000;">‘</span>;

结果：

Query OK, <span style="color: #800080;">0</span> rows affected

至此，问题解决。

 

参考：http://stackoverflow.com/questions/13480170/access-denied-for-mysql-error-1045

 

mac系统中搭建apache+mysql+php的开发环境，安装mysql后，登录报错：mac ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

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本文系统来源：http://www.cnblogs.com/benbenzhu/p/5578162.html

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