摘要:在做分布式数据库时难免用到dblink,但关于dblink的资料很少,很多书上提到了,但不详细。 数据库链接定义从一个Oracle数据库到另一个数据库的单行通信通道。 建立链接前要先有到远程数据库的命名服务(连接字符串),就是tnsnames.ora中描述的那个,如'oradXP' 先测试一下:$tnsping oradxp Attemping to contact(...) OK(30毫秒). ...
        
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摘要:1. A lambda expression is an unnamed method written in place of a delegate instance The compiler immediately converts the lambda expression to either: A delegate instance  An expression tree, of type ...
        
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摘要:1. delegate Compatibility  1) Type compatibility Delegate types are all incompatible with each other, even if their signatures are the same delegate void D1( ); delegate void D2( ); ...  D1 d1 = Metho...
        
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