sql全局变量和局部变量

全局变量和局部变量都是SQL Server中使用的变量类型。全局变量是SQL Server系统内部使用的变量，其作用范围不仅限于某个程序，任何程序都可以随时调用。全局变量通常用于存储SQL Server的配置设定值和统计数据，用户可以在程序中使用全局变量来测试系统的设定值或者执行Transact-SQL命令后的状态值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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