Hi,
I got a problem and wonder if I can get some help from the community. Thanks in advance.
Suppose I have two tables:
Table1 contains :
Date Client Score
2007-12-31 A 10
2008-12-31 A 12
2010-12-31 A 9
2008-12-31 B 8
Table2 contains only
Date
2007-12-31
2008-12-31
2009-12-31
2010-12-31
suppose I will have a table for each client I will have all the dates filled,
Client Date RC
A 2007-12-31 10
A 2008-12-31 12
A 2009-12-31 NA
A 2010-12-31 9
B 2007-12-31 NA
B 2008-12-31 8
B 2009-12-31 NA
B 2010-12-31 NA
Which join should I use?
I have tried
proc sql;
create table x as
select a.*,
b.Client as client,
coalesce(b.RC, 'NA') as RC
from test1 as a
left join test as b
on a.date=b.date
order by client, date
;
quit;
but I only got 5 rows back. I should get 2 Clients (A and B)X 4 Dates= 8 rows.
Someone has a suggestion?
Cross join
You can't have numeric and character in the same column so you may need to modify your coalesce statement.
yes I have fixed that problem
proc sql;
create table x as
select a.*,
b.Client as client,
coalesce(b.RC, 0) as RC
from test1 as a
cross join test as b
where a.date=b.date
order by client, date
;
quit;
but still i got only 4 rows
Change your where clause to On and make sure to select the date variable from table b
proc sql;
create table x as
select b.date as date,
a.Client as client,
case when not missing(a.rc) then a.rc else . end as RC
from test as a
cross join test1 as b
on a.date=b.date
order by client, date
;
quit;
it does not work on with cross join
There should be a faster way to do this, but I haven't had coffee yet.
The following works - build your table with all the possibilities and then merge with original table.
data table1;
informat date anydtdte.;
format date date9.;
input Date Client $ Score;
cards;
2007-12-31 A 10
2008-12-31 A 12
2010-12-31 A 9
2008-12-31 B 8
;
run;
data table2;
informat date anydtdte.;
format date date9.;
input date;
cards;
2007-12-31
2008-12-31
2009-12-31
2010-12-31
;
run;
proc sql;
create table empty as
select a.client, b.date
from (select distinct client from table1) as a
cross join table2 as b
order by a.client, b.date;
quit;
proc sql;
create table full as
select a.client, a.date, coalesce(b.score, 0) as score
from empty as a
full join table1 as b
on a.client=b.client
and a.date=b.date
order by 1, 2;
quit;
Thanks I will test
Wow Reeza!
It works! And it has to be in two steps...thanks a lot!
Ken
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