SAS Export

8/14/2019 SAS Export

1/35

SAS ExportSAS Export

Last Updated : 29 June, 2004

Center of Excellence


2/35

ObjectivesObjectives

Write observations from a SAS data set toacomma-delimited external file.

Use DATA step logic to insert a headerrecord and a footer record into anexternal file.


3/35

IntroductionIntroduction

You can use the DATA step to writea custom reportdata to an external file to be read by otherprogramming languages or software.


4/35

IntroductionIntroduction

The INPUT statement describes thearrangement of values in the input

data record.

The INFILE statement identifies anexternal file to read with an INPUT

statement.

The DATA statementbegins the DATA step.

READING FROMAN EXTERNAL FILE

The PUT statement describes thearrangement of values in the output

data record.

The FILE statement identifies anexternal file to write with a PUT

statement.

The DATA statementbegins the DATA step.

WRITING TOAN EXTERNAL FILE


5/35

The DATA StatementThe DATA Statement

Usually, the DATA statement specifies atleast one data set name that the SASSystem uses to create an output data set.Using the keyword _NULL_ as the data setname causes SAS to execute the DATAstep without writing observations to adata set.

DATA _NULL_;

DATA _NULL_;


6/35

The FILE StatementThe FILE Statement

The FILE statement can be used to specifythe output destination for subsequent PUTstatements.

General form of the FILE statement:

You can use the FILE statement inconditional processing (IF-THEN/ELSE orSELECT) because it is executable.

FILE file-specification ;

FILE file-specification ;


7/35

The PUT StatementThe PUT Statement

The PUT statement can write lines to theexternal file that is specified in the mostrecently executed FILE statement.General form of the PUT statement:

With simple list output, you list the namesof the variables whose values you wantwritten. The PUT statement writes avariable value, inserts a single blank, andthen writes the next value.

PUT variable-1 variable-2 variable-n ;PUT variable-1 variable-2 variable-n ;


8/35

Modified List OutputModified List Output

Modified list output increases theversatility of the PUT statement becauseyou can specify a SAS format to controlhow the variable values are written.

To use modified list output, use the colon(:) format modifier in the PUT statementbetween the variable name and theformat.

PUT variable-1 : format-1.variable-2 : format-2.

variable-n : format-n. ;

PUT variable-1 : format-1.variable-2 : format-2.

variable-n : format-n. ;

...


9/35

Writing to an External FileWriting to an External File

The prog2.maysales data set containsinformation about houses. Read this dataset and write the data to an external file.

List SellDescription Date Date SellPrice

Colonial 13803 14001 355182.74Townhouse 13894 14016 241225.17Townhouse 14108 14392 238135.98Ranch 14585 14736 219391.80Victorian 14805 15106 358186.78

prog2.maysales


10/35


data _null_;

set prog2.maysales;

file ' raw-data-file ';

put DescriptionListDate : date9.

Why is the $ omitted after Description in thePUT statement?


11/35


Partial SAS Log

Can you use PROC PRINT to view the rawdata file?

NOTE: 5 records were written to the fileexport.dat'.

The minimum record length was 34.The maximum record length was 38.NOTE: There were 5 observations read fromthe data set PROG2.MAYSALES.


12/35

The FSLIST ProcedureThe FSLIST Procedure

The FSLIST procedure enables you tobrowse external files that are not SAS datasets within an interactive SAS session.

Remember to close the FSLIST windowwhen you have finished browsing yourexternal file.

PROC FSLIST FILEREF= file-specification ;RUN ;

PROC FSLIST FILEREF= file-specification ;RUN ;


13/35

Reading from an External FileReading from an External File

How can you add a single row of column headersbefore the rows of data?

proc fslist fileref= 'raw-data-file' ;run;

Colonial 16OCT1997 02MAY1998 $355,183Townhouse 15JAN1998 17MAY1998 $241,225Townhouse 17AUG1998 28MAY1999 $238,136Ranch 07DEC1999 06MAY2000 $219,392Victorian 14JUL2000 11MAY2001 $358,187


14/35

The _N_ Automatic Variable(Review)The _N_ Automatic Variable(Review)

The _N_ automatic variable is created byevery DATA step.Each time the DATA step loops past theDATA statement, _N_ is incremented by 1.Therefore, the value of _N_ represents thenumber of times the DATA step hasiterated.

_N_ is added to the program data vectorbut is not output.


15/35


data _null_;

set prog2.maysales;


if _N_=1 then

put 'Description ' 'ListDate ''SellDate ' 'SellPrice';

Why is the second PUT statement notcontained in an ELSE statement?


16/35


How can you add a footer record after the

rows of data?

proc fslist fileref=' raw-data-file ';run;

Description ListDate SellDate SellPriceColonial 16OCT1997 02MAY1998 $355,183Townhouse 15JAN1998 17MAY1998 $241,225Townhouse 17AUG1998 28MAY1999 $238,136

Ranch 07DEC1999 06MAY2000 $219,392Victorian 14JUL2000 11MAY2001 $358,187


17/35

The END= Option in the SETStatementThe END= Option in the SETStatement

The END= option in the SET statement creates andnames a temporary variable that acts as an end-of-file indicator.

The temporary variable, which is initialized to 0, isset to 1 when the SET statement reads the lastobservation of the data set listed.The variable is not added to any new data set.

SET SAS-data-set END=variable ;SET SAS-data-set END=variable ;


18/35


data _null_;

set prog2.maysales end=IsLast;


if _N_=1 then



19/35...

PDV

DESCRIPTION$9

_N_ N8

SELLDATE

N8

SELLPRICE

N8

LISTDATE

N8

ISLASTN8

D D

List SellDescription Date Date

Colonial 13803 14001Townhouse 13894 14016Townhouse 14108 14392

Ranch 14585 14736Victorian 14805 15106

Partial Listing of prog2.maysales

data _null_;set prog2.maysales end=IsLast;file ' raw-data-file ';if _N_=1 then


put DescriptionListDate : date9.SellDate : date9.

SellPrice : dollar8.;if IsLast=1 then put 'Data: PROG2.MAYSALES';

run;

Execute


20/35

PDV

...

DESCRIPTION$9

_N_ N8

1

SELLDATE

N8

. .

SELLPRICE

N8

LISTDATE

N8

.

ISLASTN8

0

D D



Ranch 14585 14736Victorian 14805 15106






run;


21/35

......

PDV

DESCRIPTION$9

Colonial

_N_ N8

1

SELLDATE

N8

14001 355182

SELLPRICE

N8

LISTDATE

N8

13803

ISLASTN8

0

D D



Ranch 14585 14736Victorian 14805 15106






run;


22/35

......

PDV

DESCRIPTION$9

Colonial

_N_ N8

1

SELLDATE

N8

14001 355182

SELLPRICE

N8

LISTDATE

N8

13803

ISLASTN8

0

D D



Ranch 14585 14736Victorian 14805 15106






run;


23/35

......

PDV

DESCRIPTION$9

Colonial

_N_ N8

1

SELLDATE

N8

14001 355182

SELLPRICE

N8

LISTDATE

N8

13803

ISLASTN8

0

D D



Ranch 14585 14736Victorian 14805 15106






run;Continue executing DATAstep. _N_ is equal to 1.

Write header record

to raw-data-file .


24/35

......

PDV

DESCRIPTION$9

Colonial

_N_ N8

1

SELLDATE

N8

14001 355182

SELLPRICE

N8

LISTDATE

N8

13803

ISLASTN8

0

D D



Ranch 14585 14736Victorian 14805 15106






run;IsLast is equal to 0.PUT statement is not

executed.


25/35

......

DESCRIPTION$9

Townhome

_N_ N8

2

SELLDATE

N8

14108 241225

SELLPRICE

N8

LISTDATE

N8

13894

ISLASTN8

0

D D

PDV



Ranch 14585 14736Victorian 14805 15106






run;IsLast is equal to 0.PUT statement is not

executed.


26/35

......

PDV

DESCRIPTION$9

Victorian

_N_ N8

5

SELLDATE

N8

15106 358156

SELLPRICE

N8

LISTDATE

N8

14805

ISLASTN8

1

D D


Colonial 13803 14001Townhouse 13894 14016Townhouse 14108 14392Ranch 14585 14736Victorian 14805 15106




put DescriptionListDate : date9.SellDate : date9.SellPrice : dollar8.;

if IsLast=1 then put 'Data: PROG2.MAYSALES';

run;IsLast is equal to 1.PUT statement is

executed. Write footer

record to raw-data-file .


27/35


28/35

Specifying an AlternateDelimiterSpecifying an AlternateDelimiter

Use the DLM= option in the FILEstatement to create a file with analternate delimiter (other than a blank).

You can also specify a character variablewhose value contains your delimiter,instead of a quoted string.

FILE file-specification DLM='quoted-string ';

FILE file-specification DLM='quoted-string ';


29/35


data _null_;

set prog2.maysales end=IsLast;

file ' raw-data-file ' dlm=',';if _N_=1 then

put 'Description,ListDate,''SellDate SellPrice'


30/35


What is the role of each comma inthe records containing data?


Description,ListDate,SellDate,SellPriceColonial,16OCT1997,02MAY1998,$355,183Townhouse,15JAN1998,17MAY1998,$241,225Townhouse,17AUG1998,28MAY1999,$238,136Ranch,07DEC1999,06MAY2000,$219,392Victorian,14JUL2000,11MAY2001,$358,187

Data: PROG2.MAYSALES


31/35

......

Partial Output

Embedded DelimitersEmbedded Delimiters

These commas act as delimiters. The DLM= option in theFILE statement causes their appearance.

This comma acts as part of a SAS format. The DOLLAR8.format in the PUT statement causes its appearance.

Colonial,16OCT1997,02MAY1998,$355,183Colonial,16OCT1997,02MAY1998,$355,183

How many data values are contained in each record?How many comma-delimited fields are in each record?


32/35

Accounting for EmbeddedDelimitersAccounting for EmbeddedDelimiters

Use the DSD option in the FILE statement towrite data items that contain embeddeddelimiters.

Any data item that contains the specifieddelimiter is quoted with the double quotationmark (") when the data item is output.

FILE file-specification DLM='quoted-string ' DSD;

FILE file-specification DLM='quoted-string ' DSD;


33/35


data _null_;

set prog2.maysales;

file ' raw-data-file ' dlm=',' dsd;put Description

ListDate : date9.SellDate : date9.SellPrice : dollar8.;

run;


34/35



Colonial,16OCT1997,02MAY1998,"$355,183"Townhouse,15JAN1998,17MAY1998,"$241,225"Townhouse,17AUG1998,28MAY1999,"$238,136"Ranch,07DEC1999,06MAY2000,"$219,392"Victorian,14JUL2000,11MAY2001,"$358,187"


35/35

Questions

SAS Export

Documents

Transcript of SAS Export