02 2023 档案
摘要：判断datatable指定列是否重复 var query = from t in dtTemp.AsEnumerable() group t by new { t1 = t.Field<string>("StartTime"), t2 = t.Field<string>("EndTime"), t3
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摘要：select convert(varchar(50),datepart(year,InTime)) +'-'+convert(varchar(50),datepart(month,InTime)) as month ,count(1) as Qty,SiteID from FineDtl group
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