Answer / sibin

Use
1.WHERE Condition
2.DROP KEEP in Set Statement
3.ARRAY
4.Mutually Exclusive Conditions like DO ,DO UNTIL,DO WHILE

Answer / pricil kurian

1) Compressing dataset
2) Using where instead of if as subsetting conditions
3) Deleting the temporary datasets at the end of the program
4) If we use "if..else ..if conditions"..use most occuring
situations first
5)Use keep and drop appropriately to avoid the unneceesary
variable
6).Creattion of index variable
7)Use of array statement
8)Create one byte required numeric variable which we don't
use for calcualting process as charcater..Using this this
variable need 1 byte where numeric variable's minimum
length is 3.
9)Minimize the CPU time that SAS uses by executing the
minimum number of statements in the most efficient
order.
10)Use SQL for code simplification. A single SQL statement
is generally easier to code and understand than a
long series of SORT and DATA steps.
11)Use of data _null_; when we don't need to output into a
new dataset.
12)Use macros for redundant code.
13)When data sets are large and unsorted, the SQL inner
join may beter than SORT and MERGE.

Answer / koduri

Using Arrays .

Answer / solasa

for large datasets we use proc sql joins

Answer / vicky

1.we can compress the dataset

2.if we wana do merge a bigdate set with another dataset
having few variables for instance a fact with dimension
having key variable and description column
in this case sorting n merging this bigdateset(fact) with
dimension apply formats.so dat u can avoid sort n merge.

Answer / dvsr

1)compress the datasets

2)use DROP KEEP options while creating temp data sets

3)Index creation on the Frequently using variables

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0 Answers  

what are sas bi dashboard components? : Sas-bi

0 Answers  

Mention few capabilities of sas framework.

0 Answers  

what is function of retain statment

0 Answers   PPD,

how we can call macros with in data step?

17 Answers   Allianz, ManPower,

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0 Answers  

You need to perform an analysis on a massive dataset by groups, but are unable to sort the data due to memory constraint. How would you accomplish the task?

2 Answers  

How would you create a data set with 1 observation and 30 variables from a data set with 30 observations and 1 variable?

1 Answers   Quintiles,

What are the rows present in protocol Violation table?

2 Answers   Accenture, Quintiles,

At compile time when a SAS data set is read, what items are created?

14 Answers   Accenture,

What are the functions done while Compilation...?

1 Answers   TCS,

what is the primary variable in your study?

3 Answers   Accenture,