比较实体SQL中的日期
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03-07-2019 - |
题
比较日期的正确eSQL语法是什么?
等效的LINQ-to-Entities表达式如下所示:
var lastYearsShipments = from p in MyDataServiceContext.Products
where p.ShipDate.Value.Year == DateTime.Now.Year - 1
select p;
解决方案
他们说这是可接受回答你自己的问题,所以这里......
var predicate = string.Format(
"Year(it.ShipDate) == Year(cast('{0}' as System.DateTime)) -1",
System.DateTime.Now);
var lastYearsShipments =
myQuery.Products.Where(predicate); // myQuery is type ObjectQuery<T>
另请参阅: msdn文档
其他提示
string datetimeFormatter = "yyyy-MM-dd HH:mm";
var predicate = string.Format("Year(it.ShipDate) == Year(DATETIME'{0}')) -1", System.DateTime.Now.ToString(datetimeFormatter));
var lastYearsShipments = myQuery.Products.Where(predicate);
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