sql= "select * from haf where [status]= 'order received ' and datediff( 'd ',end_date,date())> 7 and datediff( 'd ',end_date,date()) <=30 "我的目的是从haf表中查出end_date与当前时间相隔7到30天内的数据，并且[status]= 'order received ' 但是这语句好象有问题,请问要怎么改呢？
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datediff(d,end_date,getdate())