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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.
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问题已经不再是 AI 能否理解工作。而是 AI 何时开始真正接管工作流程。（本文首发钛媒体App , 作者｜硅谷Tech news，编辑｜秦聪慧）
36氪获悉，京东物流发布2025年年度业绩报告。财报显示，京东物流2025年全年总收入达2171亿元，同比增长18.8%；经调整后净利润达77.1亿元。其中，第四季度一体化供应链收入同比增长44.5%。。电影是该领域的重要参考
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