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<td align="center" valign="middle" class="til"><h3> MS SQL基础教程:sql作业 </h3>
发布时间:2007-12-25 来源:网络/责编:编程入门 作者:佚名<br />
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</table><p> 作业是指被定义的多步执行的任务,每一步都是可能执行的Transact-SQL 语句,代表一个任务。作业是典型的规划任务和自动执行任务。数据库的备份和恢复、数据的复制、数据的导入/导出等都可以被定义成作业,然后在规划的时间由SQL Server Agent 来自动完成。</p>
<p> 创建一个作业的执行步骤为:</p>
<p> (1) 启动SQL Server Enterprise Manager, 登录到指定的服务器,分别顺次单击 management, SQL Server Agent 左边的“+”, (如果 SQL Server Agent 没有启动请启动)</p>
<p> (2) 右击Jobs 图标,在弹出菜单中选择New Job 选项,打开New Job Properties 对话框,如图17-8 所示。</p>
<p> <img onclick="get_larger(this)" alt="" src="/upimg/071226/11b612PW3010L53.gif" /> 在该对话框内通过选择不同的标签页来设置作业的属性。每个作业都包括以下属性: Name、 Category、 Owner、 Description、 Job steps、 Schedules、 Notifications。</p>
<p> (3) 在General 标签页定义了作业的Name、 Category、 Owner、 Description 属性,各选项含义如下: Name: 是指作业的名称,同一台服务器上的作业名必须是惟一的,其最大长度为128 个字符; Category: 表示作业目录,可以将那些具有某些共同点的作业归至同一作业目录下; Owner: 表示作业的所有者,sysadmin 角色用户可以改变作业的所有者; Description: 表示对作业的描述信息,最大长度为512 个字符; Last modified: 表示作业上一次修改的时间,如果是新创建的作业则为 NotApplicable; Enabled: 表示作业有效,否则必须手工启动; Source: 用来显示作业是在哪台服务器上创建的; Target local server: 表示作业在本地服务器上运行; (4) 选择Steps 标签,然后单击New 按钮,打开New Job Steps 对话框如图17- 9 所示,General 标签页内各选项的含义如下:</p>
<p> <img onclick="get_larger(this)" alt="" src="/upimg/071226/11b612Pa501162J.gif" /><img onclick="get_larger(this)" alt="" src="/upimg/allimg/070501/1736310.gif" /><img onclick="get_larger(this)" alt="" src="/upimg/071226/11b6129312501329A.gif" /><img onclick="get_larger(this)" alt="" src="/upimg/071226/11b612932360142I0.gif" /><img onclick="get_larger(this)" alt="" src="/upimg/071226/11b6129334P1560X.gif" /><img onclick="get_larger(this)" alt="" src="/upimg/071226/11b612934630162610.gif" /></p>
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<p>上一篇:<a href='/data/SQLServer/jc/200712/6238.htm'>MS SQL基础教程:SQL操作员</a> 下一篇:<a href='/data/SQLServer/jc/200712/6240.htm'>MS SQL基础教程:sql警报</a> </p></td>
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