topic Re: Join two tables by date falls into the range of dates in SAS Programming

Join two tables by date falls into the range of dates

Crubal — Sat, 10 Mar 2018 03:47:01 GMT

Hi,

I have two tables: a & b.

Table a:

Location | Date_1 | Price

------------------------------------

L1 | 09/08 | 104

------------------------------------

L1 | 09/09 | 134

------------------------------------

L1 | 09/10 | 78

------------------------------------

.........................................

Table b:

Location | Start_Date | End_Date | Season_Id

---------------------------------------------------------------

L1 | 09/07 | 09/09 | 1

---------------------------------------------------------------

L1 | 09/10 | 11/30 | 2

---------------------------------------------------------------

L1 | 12/01 | 12/31 | 3

---------------------------------------------------------------

L1 | 01/01 | 09/06 | 4

I would like to join table a and table b: when 'Date_1' in table a falls in the range of 'Start_Date' & 'End_Date' in table b, corresponding 'Season_Id' could be added to a particular row.

Want:

Location | Date_1 | Price | Season_Id

------------------------------------------------------

L1 | 09/08 | 104 | 1

------------------------------------------------------

L1 | 09/09 | 134 | 1

------------------------------------------------------

L1 | 09/10 | 78 | 2

------------------------------------------------------

..............................................................

My sas code:

PROC SQL;
	 	Create Table Want as select 
			A.*, B.Season_Id from  A,  B
			where A.Date_1 >= B.Start_Date and A.Date_1 <= B.End_Date
			and A.Location = B.Location;
	Quit;

But it returns an empty table.

How could I fix it?

Thank you!

Re: Join two tables by date falls into the range of dates

Patrick — Sat, 10 Mar 2018 05:50:29 GMT

The condition as such looks o.k. to me and should return rows so I assume something isn't o.k. with your variables. Are the Date variables numeric and do they contain SAS date values?

If you want us to post actually working and tested SAS code: Please post your sample data as a tested SAS data step creating the sample data.

Re: Join two tables by date falls into the range of dates

LinusH — Sat, 10 Mar 2018 05:54:27 GMT

By optical examining it looks ok, even if your dates are treated as strings.
Please attach your data as datalines if you want someone else to try your code.

Re: Join two tables by date falls into the range of dates

Kurt_Bremser — Sat, 10 Mar 2018 11:04:48 GMT

Your code works with example data made from your tables. So your datasets must differ from what you gave us.

Re: Join two tables by date falls into the range of dates

Crubal — Sat, 10 Mar 2018 16:21:47 GMT

Thanks! I output my data into excel and found that my date is actually 03/09/2017. As I used 'mmddyy5.' format for 'Date_1' in table a, and It actually has year information. Table b has different year information. So that I cannot match.

Re: Join two tables by date falls into the range of dates

Crubal — Sat, 10 Mar 2018 16:23:18 GMT

You are right, actually although in SAS date is in (month / date) format, it has year information if I output to excel. And year cannot match.

Re: Join two tables by date falls into the range of dates

Crubal — Sat, 10 Mar 2018 16:24:44 GMT

Thanks for your reminding. It is resolved if I output the dataset into excel. As it has year information but I shortcut it to 'mmddyy5.' to let it show just month and date.

Re: Join two tables by date falls into the range of dates

Patrick — Sun, 11 Mar 2018 00:40:45 GMT

@Crubal It would technically be possible to join just on the day and month part of a date - but I guess that wouldn't make business sense.

Re: Join two tables by date falls into the range of dates

Kurt_Bremser — Mon, 12 Mar 2018 06:27:09 GMT

@Crubal wrote:
Thanks! I output my data into excel and found that my date is actually 03/09/2017. As I used 'mmddyy5.' format for 'Date_1' in table a, and It actually has year information. Table b has different year information. So that I cannot match.

I can only repeat the same old, same old:

POST EXAMPLE DATA IN A DATA STEP WITH DATALINES!

Without solid example data, all our attempts at helping you are just guesswork, and lack of such eample data only causes a totally unnecessary delay in the path to a solution.

Re: Join two tables by date falls into the range of dates

Filipvdr — Mon, 30 Sep 2019 11:57:15 GMT

https://pdfs.semanticscholar.org/dc07/8531d26794c3ca8a5079c8abc451eef4eedd.pdf this is a good paper

Re: Join two tables by date falls into the range of dates

RoyBelderok — Thu, 14 Sep 2023 08:57:01 GMT

I know its well over 5 years since your post but if you're still troubled by this I think you should look into the CASE statement