1. left Join

原始sql

select t.[MINTAccountIdentifier] from BSS_Tenant t left joinBL_SAPCustomer s on s.BillableAccountID=t.MINTAccountIdentifier where s.CustomerID is null;

轉(zhuǎn)化的linq

from t in entities.BSS_Tenantjoin s in entities.BL_SAPCustomer on t.MINTAccountIdentifier equals s.BillableAccountID into osyfrom os in osy.DefaultIfEmpty()where os.CustomerID == nullselect t.MINTAccountIdentifier;

生成的sql

SELECT [Extent1].[MINTAccountIdentifier] AS [MINTAccountIdentifier]FROM [dbo].[BSS_Tenant] AS [Extent1]LEFT OUTER JOIN [dbo].[BL_SAPCustomer] AS [Extent2] ON [Extent1].[MINTAccountIdentifier] = [Extent2].[BillableAccountID]WHERE [Extent2].[CustomerID] IS NULL

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轉(zhuǎn)載于:https://www.cnblogs.com/sunShineJing/p/4670897.html

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