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并发控制.html
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<html>
<head>
<title>并发控制</title>
<basefont face="微软雅黑" size="2" />
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="exporter-version" content="Evernote Windows/307425 (zh-CN, DDL); Windows/10.0.0 (Win64);"/>
<style>
body, td {
font-family: 微软雅黑;
font-size: 10pt;
}
</style>
</head>
<body>
<a name="640"/>
<h1>并发控制</h1>
<div>
<span><div><font style="font-size: 14pt;">并发:</font><font style="font-size: 12pt;">指多用户共享的系统中许多用户可能同时对同一数据进行操作。</font></div><div><img src="并发控制_files/Image.png" type="image/png" data-filename="Image.png"/></div><div>并发存在问题:</div><div><img src="并发控制_files/Image [1].png" type="image/png" data-filename="Image.png"/></div><div><font style="font-size: 14pt;">封锁协议:</font></div><div><img src="并发控制_files/Image [2].png" type="image/png" data-filename="Image.png" style="font-size: 14pt;"/></div><div><br/></div></span>
</div></body></html>