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40 lines
2.0 KiB
HTML
40 lines
2.0 KiB
HTML
---
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layout: post
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category: "php"
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title: 记录一些SQL语句
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tag: [SQL]
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---
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<p>作为一个前端出身的，也是强行做一波后台需求。。。。最基础的就是建数据表了吧，整个项目下来，大概就用了这些命令，做个笔记，以便备忘。各路大神勿喷。。。。。</p>
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<pre>
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create table star_user(
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id int unsigned not null primary key auto_increment,
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username char(20) not null default '',
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login_ip varchar(30) not null,
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`lock` tinyint(1) unsigned not null default 0,
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`fc_msg` text NOT NULL,
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`msg_dttm` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
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`ir_msg_detail` tinytext NOT NULL,
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`ir_func_seq` smallint(3) NOT NULL,
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unique(username)
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) engine myisam default charset utf8;
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</pre>
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<pre>insert into star_user set password = md5('admin'), login_time = unix_timestamp(now());</pre>
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<pre>delete from star_user where login_time = 0;</pre>
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<pre>truncate table star_blog; -- 清空数据库</pre>
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<pre>alter table star_ip_list add p_times int unsigned not null default 0; -- 修改表结构</pre>
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<pre>update `vote`.`star_blog` set `href` = 'http://uzone.univs.cn/blog/4465172.html' where `star_blog`.`id` =21; -- 更新数据</pre>
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<p>其他的比如 use \ show \ desc \ drop 之类的，很常用就不加例子了。</p>
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<p>连接和导出数据库：（<a href="http://blog.csdn.net/zhouhong1026/article/details/38873439">参考链接</a>）</p>
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<pre>
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mysql -h dbhost -u dbuser -p dbname
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mysqldump -h dbhost -u dbuser -p dbname
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</pre>
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<p>然而在实际导出的时候报了一个错误。</p>
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<pre>
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mysqldump:Couldn't execute ‘SELECT @@GTID_MODE':Unknown system variable 'GTID_MODE' (1193)
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</pre>
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<p>造成此错误的原因是因为5.6引入了Global Transaction Identifiers (GTIDs) 。GTIDs可以让主从结构复制的跟踪和比较变得简单。mysqldump会试图查询这个系统变量，但这个变量在5.6之前的版本中不存在，所以产生错误。的方法很简单。在mysqldump后加上-–set-gtid-purged=OFF命令。即：</p>
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<pre>
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mysqldump -h dbhost -u dbuser -p dbname -–set-gtid-purged=OFF
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</pre> |