Lesson 10.4.14 -->MERGENOBY

[Thirumagal manivannan]

Hi,
Please explain about  MERGENOBY in SAS studio.
1. I have checked in Google also. But I am not able to understand.
/*Mergenoby


Value                    Description                                            Default (Y/N)

NOWARN            performs the positional merge without warning                        N

WARN             Performs  the positional merge but writes a warning message            Y
                   to the log 
                  
                  
ERROR              Performs an ERROR message to the log and the DATA step terminates      N   */

Googles search.

Syntax

MERGENOBY= NOWARN | WARN | ERROR

Syntax Description

NOWARN

specifies that no warning message is issued. This is the default.

WARN

specifies that a warning message is issued.

ERROR

specifies that an error message is issued.

[Anova Groups]

Before SAS 9.2, you could merge two dataset without a BY statement, you can still do it, but now if you want SAS should issue a error/warning message when user tries to merge without using BY then you need to turn the above option on and use appropriate option.