第155期:《转让半导体头部企业LP份额；求购宇树科技等多家人形机器人公司股份｜资情留言板第155期》
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。PDF资料对此有专业解读
When you pass a C# string through an anonymous object, Dapper maps it to nvarchar(4000). That’s the default mapping for System.String in ADO.NET — and honestly, it makes sense from a “safe default” perspective. But if your column is varchar, SQL Server has to convert every single value in the column to nvarchar before it can compare. This is called CONVERT_IMPLICIT, and it means SQL Server can’t use your index. Full scan. Every time.，推荐阅读PDF资料获取更多信息
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