从现在的日期时间获取月份，从现在的日期中获取月份，并输入特定的日期

Question

Hello everyone i want search data from invoices and client by today date I'm using DateDiff() GETDATE() functions for example two tables

1 Client

 - ID   int
 - Name Varcher

2 Invoice

 - ID int
 - ClientID int
 - date  Datetime
 - Total  money

query

 Select * from client c 
 inner join invoice i on c.id = i.ClientID 
 WHERE DateDiff(dd, i.date, getdate()) = 0

when i run query the getdate() it is function to get date from date time now the date content current month and current year and current day when i run query today the date is 08-23-2010, when i run query tomorrow the date is 08-24-2010.

Q - the query do something equal date i want get month from date time now month, get year from date time now year and write specific day only.

Answer 1

I do not understand your question clearly, but as far as I understand you want to have a time difference other than 0 days. You would then have to use other dateparts (first argument to DateDiff() ) See the MS documentation of DateDiff for details, or the DateAdd function.

Furthermore, maybe you want to use

i.date between DateAdd(dd, -10, getDate) and getDate()

(which would show everything between ten days ago and today).

Answer 2

declare @day integer

select @day = 10

Select * from client c 
inner join invoice i on c.id = i.ClientID 
WHERE 
DateDiff(dd, i.date, dateadd(dd,@day-datepart(dd,getdate()),getdate())) = 0