What is the set statement in SAS?
What is the set statement in SAS?
The function of the SET statement is to process existing SAS data sets as input for a DATA step. With no options specified, the SAS System sequentially reads each observation in the named data sets, one observation at a time, until there are no further observations to process.
Where is dataset option in SAS?
Use the WHERE= data set option with an input data set to select observations that meet the condition that is specified in the WHERE expression. SAS brings the observations into the DATA or PROC step for processing.
How do you create a dataset in SAS?
In SAS, you can create a new dataset by reading data from an input file (Excel, CSV, TXT, etc.), by using an existing dataset, or by entering the data manually. The last one is known as instream data and is a convenient way to quickly create a dataset with a small amount of data.
Which statement is used to read a SAS data set in a DATA step?
SET statement
A SET statement reads observations from a SAS data set for further processing in the DATA step.
What is difference between options and statements in SAS?
The main differences are described below: Data Step Options: Work on both input and output variables. Controls how variables and observations get processed during input and output stages of the DATA Step. Data Step Statements: Work only on output variables.
How does SAS process data?
SAS reads a data record from a raw data file into the input buffer, or it reads an observation from a SAS data set directly into the program data vector. You can use an INPUT, MERGE, SET, MODIFY, or UPDATE statement to read a record. SAS executes any subsequent programming statements for the current record.
What is data _null_ in SAS?
In SAS, the reserved keyword _NULL_ specifies a SAS data set that has no observations and no variables. The _NULL_ data set is often used when you want to execute DATA step code that displays a result, defines a macro variable, writes a text file, or makes calls to the EXECUTE subroutine.
What is data set in SAS?
A SAS data set is the standard data storage format for data created with SAS. The great thing about SAS data sets is that they are fast to open and analyze relative to other data storage methods, such as text files, comma separated values (CSV) files, Excel spreadsheets , and even relational databases like Oracle or DB2.
How do you combine data sets in SAS?
Merge two data sets in SAS. To merge two or more data sets in SAS, you must first sort both data sets by a shared variable upon which the merging will be based, and then use the MERGE statement in your DATA statement. If you merge data sets without sorting, called one-to-one merging, the data of the merged file will overwrite…
How many data types do we have in SAS?
When SAS stores your data, it only has 2 data types: character variables and numeric variables. SAS EG and the SAS Enterprise Intelligence Platform check the descriptor portion of the SAS data set (or the Metadata for the data set) to determine whether a FORMAT (or INFORMAT) has been applied to a numeric variable.
How does Sas merge datasets?
Multiple SAS data sets can be merged based on a specific common variable to give a single data set. This is done using the MERGE statement and BY statement . The total number of observations in the merged data set is often less than the sum of the number of observations in the original data sets.
