SQL语句包含诸多技巧，除基础的增删改查外，还有许多高级用法与优化策略。 1、 我使用的是64位Windows 7系统，因此安装了64位版本的SQL Server 2008R2以确保兼容性和性能。 2、 安装时请注意确认操作系统的位数，32位系统需安装32位版本的SQL Server，版本可选2005或2012 ...

SQL remains the foundation for turning raw records into reports and business insights across industriesCore queries like ...

Learn how to master the SELECT statement to form truly useful data queries. This article explains functions, clauses, and keywords that will make your life a lot easier. Due to popular demand, we’re ...

Complex queries can be solved with a combination of simpler LINQ queries, anonymous objects and the Group/By/Into clauses. Using Group/By/Into will also give you the best possible performance for ...