what is the difference between SET and MERGE?
Answer Posted / kithsiri
Data C;
Set A B;
run;
Concaternate A and B data sets and make c Data set. Then data of B data set is placed after data of A data set. If A has n1 number of observation and B set has n2 number of observation. Then C(new set has n1+n2 number of data)
Data C;
set A B;
By var1;
run;
If var1 variable is exist in both A and B data sets, in C data set rows are arrenged according to var1 variable(ascending order).
Data C;
merge A B;
By var1;
run;
Data are arrenged side by side if there are var1 in both data sets and match rows of both sets. If A data set is not matched with B then display records of A in left side and right side data is missing values. If B data is not matched with A then display records of B in right side and left side data is missing values. If there is same variable in both tables, observation of that variable of first table is replaced by observation of the same variable of second table when match observation of var1 in both tables.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
how many display types available in sas bi dashboard? : Sas-bi
Hello, I have PROC SQLs results group by 3 fields and I use SUM and COUNT functions in SQL. The problem is when I try to display my result with PROC TABULATE. I am getting very big numbers. I believe I make a mistake some where in Tabulate. Here is my Proc Tabulate. PROC TABULATE DATA=OUT04_05 FORMAT=12.; CLASS YR CENTRE VISA / PRELOADFMT EXCLUSIVE; VAR NEWUSER FRAUD TRANSFER AUTUSER REISSUE; TABLE CENTRE ALL, (YR ALL)*VISA, (NEWUSER*F=COMMA12. AUTUSER*F=COMMA12. FRAUD*F=COMMA12. TRANSFER*F=COMMA12. REISSUE*F=COMMA12.) / MISSTEXT={LABEL='0'} PRINTMISS RTS=20; FORMAT VISA VISAFMT.; KEYLABEL SUM = ' ' ALL = 'TOTAL'; LABEL YR = 'DATE YEAR' NEWUSER = 'TOTAL NEW ACCT' TRANSFER = 'TOTAL TRANSFER' FRAUD = 'TOTAL FRAUD TRANSFER' AUTUSER = 'TOTAL AUTH USERS' REISSUE = 'TOTAL REISSUE'; When I code it like : NEWUSER*N*F=COMMA12. AUTUSER*N*F=COMMA12. I get same amount numbers but to find a NEWUSER I use COUNT(*) and to find AUTUSER I use SUM(xxxx) function so both result shouldn’t be the same my problem is in this point. Could you tell me where the problem in code is. How can I display my result? TX.
If you have a dataset that contains 100 variables, but you need only five of those, what is the code to force SAS to use only those variables?
how sas deals with business intelligence? : Sas-bi
List out some key concept of SAS
what is metadata? : Sas-bi
Differences between where and if statement?
what is sas olap server? : Sas-di
What is slibref?
why is sas data integration studio important? : Sas-di
What is a put statement?
how do you debug and test your sas programs? : Sas programming
What is the role of administrative users? : sas-grid-administration
What is a method to debug and test your SAS program?
how does sas handle missing values in: assignment statements, functions, a merge, an update, sort order, formats, procs? : Sas programming