I have two instances of SQL Server 2008 Express and one instance of SQL Server 2012 on my development machine. We're developing an ASP.NET MVC application and use the expression data source=(local); inside of our connectionString in Web.config.I have two instances of SQL Server 2008 Express
阅读背景：
数据源背后的逻辑=连接字符串中的（本地）
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