SQL Server主 - 详细信息查询，强制单个详细记录

Question

我正在进行查询，我需要加入两个没有关系的表，并且只搜索子零售的记录== 1：

SELECT dbo.BILL_INFO.BILL_NUMBER,
       dbo.BILL_INFO.BILL_DATE,
       dbo.BILL_INFO_DETAIL.SERVICE_CODE,
       dbo.BILL_INFO_DETAIL.SERVICE_FEE,
       dbo.BILL_INFO_DETAIL.REQUESTED_QUANTITY
FROM dbo.BILL_INFO
    INNER JOIN dbo.BILL_INFO_DETAIL
        ON dbo.BILL_INFO.BILL_NUMBER = dbo.BILL_INFO_DETAIL.BILL_NUMBER
           AND dbo.BILL_INFO.PAY_MODE_ID = dbo.BILL_INFO_DETAIL.PAY_MODE_ID
           AND dbo.BILL_INFO.CASHIER_ID = dbo.BILL_INFO_DETAIL.CASHIER_ID

所以，BILL_INFO_DETAILs = 1

的所有记录

我最终将使用EF：

var test = from billInfo in context.BILL_INFOS
           join billInfoDetail in context.BILL_INFO_DETAILS
               on new {billInfo.BILL_NUMBER, billInfo.PAY_MODE_ID, billInfo.CASHIER_ID}
               equals new
               {
                   billInfoDetail.BILL_NUMBER,
                   billInfoDetail.PAY_MODE_ID,
                   billInfoDetail.CASHIER_ID
               }
           where billInfo.REMARKS.Contains(passNumber.ToString())
           select new
           {
               billInfo.BILL_NUMBER,
               billInfo.BILL_DATE,
               billInfoDetail.SERVICE_CODE,
               billInfoDetail.SERVICE_FEE,
               billInfoDetail.REQUESTED_QUANTITY
           };

所以，如果BILL_INFO和BILL_INFO_DETAIL有关系，我会在where子句中说：w.BILL_INFO_DETAILS.Count（）== 1（所有账单只有一个账单明细）

我怎么做这个，因为没有关系？