topic Re: proc left join in SAS Programming

proc left join

JNWong — Sun, 08 Oct 2017 05:42:54 GMT

Hi，

AS i need to calculated the opening price-deflated earnings which is (net profits t /price t-1) within groups.

the price would be the value of previous year. the net profit is current value.

the data in my profit table(containing net profit) is like:

stkcd year net profit

00001 1991 4000

00001 1992 4500

00001 1993 3800

00002 1991 2000

00002 1992 3000

........

and the data in the market table (containing the opening price) is like

stkcd year price

00001 1991 20

00001 1992 25

00001 1993 30

00002 1991 10

00002 1992 20

i want the get the result like :

stkcd year net profit price

00001 1991 4000 .

00001 1992 4500 20

00001 1993 3800 25

00002 1991 2000 .

00002 1992 3000 20

i have add a variable (year1 ) which is equal to year+1 to the market table so that i can identify the deflated price value.

and try the code like:

proc sql;
create table h2 as
select profit.*,market.price as lagprice
from profit left join market
on profit.stkcd=market.stkcd and profit.year=market.year1;
quit;

it have processed without error but in the last table, the price values are all missing.

hope you can help me with the problem! thank!

Jane

Re: proc left join

Kurt_Bremser — Sun, 08 Oct 2017 05:51:56 GMT

How did you add year1, and what does the log of both steps look like (use the {i} icon for posting logs)?

Re: proc left join

JNWong — Sun, 08 Oct 2017 06:00:17 GMT

Sorry for clicking the wrong button.

i just add the year1 using the data step:

data market;
set market;
year1= year +1;
run;

and the pro log is :

35 proc sql;
36 create table h2
37 as select pro9.*,trd_year5.Yopnprc as lagYopnprc
38 from w1.pro9 left join w1.trd_year5
39 on pro9.stkcd=trd_year5.stkcd and pro9.year=trd_year5.year1;

NOTE: WORK.H2 has been created，there are 35376 rows，66 colmuns。

40 quit;

Re: proc left join

Kurt_Bremser — Sun, 08 Oct 2017 06:12:12 GMT

There's no access to market in your proc sql. Without seeing all the code, there's no way to diagnose it.

Re: proc left join

Kurt_Bremser — Sun, 08 Oct 2017 06:13:06 GMT

And follow my advice for posting logs.

Re: proc left join

JNWong — Sun, 08 Oct 2017 06:45:00 GMT

OK, the log for proc step is

11
12 proc sql;
13 create table h2
14 as select pro8.*,trd_year4.Yopnprc as lagYopnprc
15 from w1.pro8 left join w1.trd_year4
16 on pro8.stkcd=trd_year4.stkcd and pro8.year=trd_year4.year1;

NOTE: the WORK.H2 has been created ´there are 35596 rows 6 columns.

i drop the processing time.

thanks.

Re: proc left join

Kurt_Bremser — Sun, 08 Oct 2017 07:32:32 GMT

This is getting nowhere.

Post examples for your datasets pro8 and trd_year4.

Use datasteps with datalines, so we can easily recreate your datasets with copy/pasting and submit.

Re: proc left join

JNWong — Sun, 08 Oct 2017 11:44:09 GMT

Thanks, KurtBremser

i think it may be something wrong with my datasets. and i converted the character values for 'stkcd' to numeric values and it worked.

i would care of the way in which i post my question in future.

Jane