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show databases;
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create database dengheping;
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use dengheping;
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create table user(id int primary key auto_increment,name char(255));
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show tables;
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desc user;
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alter table user add password varchar(64);
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alter table user modify password varchar(64) not null;
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alter table user drop password;
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mysqlµÄÅäÖÃÎļþmy.ini

# MySQL Server Instance Configuration File
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SHELL>vi /etc/my.cnf
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#no-auto-rehash
auto-rehash
SHELL>reboot mysqld
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mysql: Too many connections

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ERROR 1040 (00000): Too many connections
Õâµ¹ÊÇ´ÓÀ´Ã»Åöµ½¹ý£¬²»¹ýÔÚ console Ï¿ÉÒÔÓà root µÇ¼ £¨console ÏÂÓÃÆäËûÓû§Ò²²»¿ÉµÇ¼£¬Too many connections£©
mysql -uroot -p
mysql > show processlist;
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