Question : Need to get previous months in SQL Server

Yes, it's me again... another in a long line of questions.

I have this SQL:

SELECT month, funding_stoplight, funding_desc
FROM stoplight_listing
WHERE month = datepart(month,getDate()) AND year = datepart(year,getDate()) AND pid = 'TEST';

which works fine for what I need... the status of the current month.

Now the client wants me to get the status of the "PREVIOUS" months...

Things to consider...

If a project just starts, there are no previous months...

if we're in month 1 or 2 there's only going to be at max, 1 or 2 months previous.

If we span years... how do I calculate for that... considering a project could start Jan 1, XXXX

I think that covers it.

The return values for the ABOVE SQL is:

Month    Stoplight     Description
7            Y                Some text...

I want to display the previous 3 months:

So it could be:

6       G       All is good
5       R       All is bad
4       Y       All is not so bad....

Do I need separate SQL Statements or can I accomplish it with on SQL?

Thanks, all,

Peter

Answer : Need to get previous months in SQL Server

you should better have the complete date in a column instead of separated columns for year and month...


that way you may have a query with "date BETWEEN getDate() AND DATEADD(MONTH, -3, getDate())"