Interested to Buy Any Domain ? << Click Here >> for more details...
what is Difference between PROC SQL JOINS and MERGE?
- 3 Answers
- 26557 Views
- Accenture, Wipro, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rajitha macherla
The resultant dataset depends on the input datasets.
In case of one to one and one to many both work
similarly,i.e. the resultant dataset is same.
But differs in case of many to many and non matching
datasets:
many to many:
ex: (merge on x) (proc sql)
X Y X Z X Y Z X Y Z
----- ------ ------- -------
1 A 1 F 1 A F 1 A F
1 C 1 R ---> 1 C R 1 A R
2 B 2 G 2 B G 1 C F
1 C R
2 B G
NON MATCHING DATA:
ex: (merge on x) (proc sql)
X Y X Z X Y Z X Y Z
----- ------ ------- -------
1 A 1 F 1 A F 1 A F
2 B 3 T ---> 2 B . 3 C T
3 C 4 G 3 C T
4 . G
| Is This Answer Correct ? | 28 Yes | 6 No |
Answer / siddu
Before doing the merge process we have to do sorting depended the key variable, but in proc sql joins no need to do sorting.
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / nrtya vardhanapu
merge is a statement which is used in the data step Whereas
join is a procedure which is used in the proc step. But the
outputs produced are the same !!!!
| Is This Answer Correct ? | 0 Yes | 13 No |
how do you want missing values handled? : Sas programming
Where do the database management systems store data and how do u import them.
How would you include common or reuse code to be processed along with your statements?
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.
what is information maps?
What is the use of the %include statement?
how would you create multiple observations from a single observation? : Sas programming
Baseline definition in your study
3 Answers Accenture, Quintiles,
What is the good sas programming practices for processing large data sets?
What data sets do you need to produce the report?
if the Id has more then two transcatiion then show the first observation, IF Id has only two observation then It show both the observation
What Proc glm does?
Teradata 
