I\'m doing some work for a charity that\'s having a fund drive. Whenever someone makes a pledge, their pledge amount is logged to SQL Server.They\'d like to have the pledge total posted across a coupl
目录正文简单封装override bind()测试一下正文 你是否遇到过，出现异常的时候也需要给一个默认值，让程序可以继续运行下去？
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