Sql 为什么我在执行此查询时会获得20142015年至2016年5月的记录>；

将t1条件移动到

WHERE

子句：

select t1.InvoiceNumber ,t1.LocalAmount  , t2.LineAmount as discount , t1.CreateDate
from CashOrderTrn t1 
left join DistrubutedDiscountDetails t2 
    on t1.InvoiceNumber =  t2.InvoiceNumber  
    and t1.CreateDate between '20160531' and  '20160701' 
    and t1.InvoiceType ='31'

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顺便说一句，您是否在字符列中存储日期？我建议改为使用

date

列。

t1列。CreateDate的数据类型？@RowlandShaw，不，t1，不是t2。@RowlandShaw不是这样，其中

中的两个条件都适用于第一个表
t1
select t1.InvoiceNumber ,t1.LocalAmount , t2.LineAmount as discount ,
      t1.CreateDate
from CashOrderTrn t1
left join DistrubutedDiscountDetails t2 on t1.InvoiceNumber = t2.InvoiceNumber
WHERE t1.CreateDate between '20160531' and '20160701' and t1.InvoiceType ='31'