## How can I combine multiple rows to a single row?

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Occasional Contributor
Posts: 16

# How can I combine multiple rows to a single row?

Hello,

I have a table that has multiple rows, and some of the values are missing. I just need to combine them into a single row by year.

I have done it with two data sets. In this case, I only have one data set. What is best way to combine them to a single row?

Input table:

ID Year Value1 Value2 Value3

1  1999              270

1  1999                          350

1  1999

1  2000    20

1  2000              300

1  2000                           320

1  2001              122

1  2001

1  2001                           500

I need the output table as below:

ID Year Value1 Value2 Value3

1  1999           350        270

1  2000   20     300       320

1  2001           122        500

Accepted Solutions
Solution
‎09-29-2017 12:04 PM
SAS Employee
Posts: 11

## Re: How can I combine multiple rows to a single row?

Editor's note: this topic is very popular.  Thanks to @peterz@Hima, and @AskoLötjönen and others who contributed useful replies.  We have consolidated some of these into this single reply so that future readers may benefit.

/* input data */

data input_table;

infile cards missover dsd;

input ID Year Value1 Value2 Value3;

datalines;

1,1999,,270

1,1999,,,350

1,1999,,,

1,2000,20

1,2000,,300

1,2000,,,320

1,2001,,122

1,2001,,,

1,2001,,,500

;

run;

/*   Method #1 using PROC MEANS  */

proc means data=input_table noprint nway;

class id year;

var value1 value2 value3;

output

out=output_table(drop=_type_ _freq_) max=;

quit;

/* Method #2 using the UPDATE statement */

data want;

update input_table (obs=0) input_table;

by id year;

run;

/* Method 3 using PROC SQL */

proc sql;

create table test2 as

select id,

year,

max(value1) as value1,

max(value2) as value2,

max(value3) as value3

from input_table

group by id, year;

quit;

/* Resulting data set */

Obs   ID   Year  value1 value2 value3

1         1    1999     .         270     350

2         1     2000  20        300     320

3         1     2001    .         122     500

All Replies
Occasional Contributor
Posts: 8

## Re: How can I combine multiple rows to a single row?

I think you are after:

data

input_table;

infile

cards missover dsd;

input

ID Year Value1 Value2 Value3;

cards

;

1,1999,,270

1,1999,,,350

1,1999,,,

1,2000,20

1,2000,,300

1,2000,,,320

1,2001,,122

1,2001,,,

1,2001,,,500

;

proc means data=input_table noprint nway;

class id year;

var value1 value2 value3;

output

out=output_table(drop=_type_ _freq_) max

=;

quit

;

Occasional Contributor
Posts: 8

## Re: How can I combine multiple rows to a single row?

Hmmmm, not used to this editor thing. It seems pretty stupid. It has moved all the semi-colons and added carriage returns in random places but the basic syntax you need is there.

It also doesn't like me Ctrl+Ving stuff into it.

Posts: 3,162

## Re: How can I combine multiple rows to a single row?

What happened? This thread has been sufficiently discussed and multiple answers have been offered yesterday, now they are all GONE???

Super Contributor
Posts: 1,636

## Re: How can I combine multiple rows to a single row?

The OP post the question twice.

http://communities.sas.com/message/117621#117621

Regular Contributor
Posts: 233

## Re: How can I combine multiple rows to a single row?

Yes Hai.Kuo, something happened but they are all gone. Here is the code posted  by PGStats yesterday. I saved it.

data have;
input ID Year Value1 Value2 Value3;
datalines;
1  1999      .      270 .
1  1999      . .                 350
1  1999   . . .
1  2000    20 . .
1  2000    .         300 .
1  2000    .          .           320
1  2001     .        122 .
1  2001     .         . .
1  2001     .         .           500
;

data want;
update have(obs=0) have;
by id year;
run;

PROC Star
Posts: 8,092

## Re: How can I combine multiple rows to a single row?

Hima:  Glad you found it as I was going to repost it myself, and add in the original statement crediting Tom Abernathy for originally suggesting it.

Apparently some people still don't realize that, if they delete a post, they also delete all posts that have replied to their post.

Regular Contributor
Posts: 233

## Re: How can I combine multiple rows to a single row?

Yes Art. I am totally agreeing with you. PGStats said that the saved the code from Tom. I forgot to add that in my previous post.

Occasional Contributor
Posts: 5

## Re: How can I combine multiple rows to a single row?

Hello Arthur,

How can we get this kind of a result?

O/P

1 1999  (22,30,12) (270,40,14) (32,50,14) - Brackets means a single cell.

2 2000 (18,20,15) (22,33,22) (25,36,320)

input ID Year Value1 Value2 Value3;

datalines;

1  1999      22  270 32

1  1999      30 40 50

1  1999   . 12 14

1  2000    18 22 25

1  2000    20 33 36

1  2000    15 22  320

1  2001     .        122 .

1  2001     .         . .

1  2001     .         .           500

;

data want;
update have(obs=0) have;
by id year;
run;

Thank you!

Posts: 3,162

## Re: How can I combine multiple rows to a single row?

aha, the 'wicked' update statement application. Just FYI, after I have studied help document on 'update', it turns out in this case, both (obs=0) and (obs=1) would work.

Regards,

Haikuo

PROC Star
Posts: 8,092

## Re: How can I combine multiple rows to a single row?

Yes but, if you are dealing with a file containing millions of IDs, why read all of those records if you don't have to?

Contributor
Posts: 44

## Re: How can I combine multiple rows to a single row?

Hi Roger,

I think that using of proc Sql is the easiest solution:

data test;

input ID @1 year 4-7 value1 11-17 value2 22-28 value3 33-39;

datalines;

1  1999

;

run;

proc sql;

create table test2 as

select id,

year,

max(value1) as value1,

max(value2) as value2,

max(value3) as value3

from test

group by id, year;

quit;

Regular Contributor
Posts: 195

## Re: How can I combine multiple rows to a single row?

Here is my try...

proc sql;

create table want as

select id,year,

sum(value1) as value1,

sum(value2) as value2,

sum(value3) as value3

from have

group by 1,2;

quit;

-Urvish

Solution
‎09-29-2017 12:04 PM
SAS Employee
Posts: 11

## Re: How can I combine multiple rows to a single row?

Editor's note: this topic is very popular.  Thanks to @peterz@Hima, and @AskoLötjönen and others who contributed useful replies.  We have consolidated some of these into this single reply so that future readers may benefit.

/* input data */

data input_table;

infile cards missover dsd;

input ID Year Value1 Value2 Value3;

datalines;

1,1999,,270

1,1999,,,350

1,1999,,,

1,2000,20

1,2000,,300

1,2000,,,320

1,2001,,122

1,2001,,,

1,2001,,,500

;

run;

/*   Method #1 using PROC MEANS  */

proc means data=input_table noprint nway;

class id year;

var value1 value2 value3;

output

out=output_table(drop=_type_ _freq_) max=;

quit;

/* Method #2 using the UPDATE statement */

data want;

update input_table (obs=0) input_table;

by id year;

run;

/* Method 3 using PROC SQL */

proc sql;

create table test2 as

select id,

year,

max(value1) as value1,

max(value2) as value2,

max(value3) as value3

from input_table

group by id, year;

quit;

/* Resulting data set */

Obs   ID   Year  value1 value2 value3

1         1    1999     .         270     350

2         1     2000  20        300     320

3         1     2001    .         122     500

Regular Learner
Posts: 1

## Re: How can I combine multiple rows to a single row?

This is awesome! Thank you!

☑ This topic is solved.