2 dates in a SQL stored proc - 7 days prior and 30 days in future

Hi,

I have a new for 2 dates in my SQL stored procedure.
1) 7 Days prior to today
2) 30 days in the future from today.

I am using these, but they don't seem to be working:
DECLARE @7daysago DATE = CONVERT(DATE, DATEADD(DAY, -DAY(GETDATE()) -7, DATEADD(MONTH, 1, GETDATE())));
DECLARE @30daysinfuture DATE = CONVERT(DATE, DATEADD(DAY, -DAY(GETDATE()) +30, DATEADD(MONTH, 1, GETDATE())));

Could anyone please point me in the right direction?

cheers

be careful using getdate() because it is actually the current date AND time, you can use cast(getdate() as date) to set the time to 00:00:00

select
cast(getdate() as date) as today
, cast(getdate() as date) -7 as seven_days_ago
, cast(getdate() as date) +30 as thirty_days_from_now

Using integers for addition isn't common in TSQL coding, instead using dateadd() is more common, i.e.

select
cast(getdate() as date) as today
, dateadd(day,-7,cast(getdate() as date) ) as seven_days_ago
, dateadd(day,30,cast(getdate() as date) ) as thirty_days_from_now

These will also work:

CONVERT(DATE, DATEADD(DAY, -7, GETDATE()))
CONVERT(DATE, DATEADD(DAY, +30, GETDATE()))

[edit]
looking back at your originals it seems that you felt it necessary to alter the day and the month - individually - when using DATEADD(). Hopefully you can see that this isn't needed, dateadd() will accurately add or deduct the number of time units from a parameter datetime value.

If in doubt on how to use a function, books online will help: e.g.
https://docs.microsoft.com/en-us/sql/t-sql/functions/dateadd-transact-sql?view=sql-server-2017

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LVL 81

slightwv (䄆 Netminder) Commented: 2019-03-06

This seems to work for me:
select getdate() as today, getdate()-7 as seven_days_ago, getdate()+30 as thirty_days_from_now

https://dbfiddle.uk/?rdbms=sqlserver_2017&fiddle=951dc5b370207b87b35aa3f43c257c25

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James MurphyAuthor Commented: 2019-03-06

that is perfect. Many thanks!

Glad to help.

If you want a slightly different way that is probably more mainstream:
select getdate() as today, dateadd(day,-7,getdate()) as seven_days_ago, dateadd(day,30,getdate()) as thirty_days_from_now

LVL 52

PortletPaulEE Topic AdvisorCommented: 2019-03-06

2 dates in a SQL stored proc - 7 days prior and 30 days in future

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