Question: What Is %Let In SAS?

What does Sysfunc do in SAS?

%SYSFUNC allows us to convert a macro variable using a format without having to resort to a data step.

This example converts a macro variable date string into a macro variable containing the SAS date representation using an existing SAS format.

This example converts a macro variable using a user format..

What is Proc SQL in SAS?

PROC SQL is a powerful Base SAS Procedure that combines the functionality of DATA and PROC steps into a single step. … PROC SQL can be used to retrieve, update, and report on information from SAS data sets or other database products.

How do I create a numeric macro variable in SAS?

You can make them manually using the %LET statement, or you can make the process automatic using the CALL SYMPUT in the DATA step or the INTO statement in PROC SQL. To create a large number of different macro variables with different content, SAS software also offers us the power of the CALL SET statement.

How do I get todays date in SAS?

To view as a date, apply the desired format. Change to your code: TODAY() AS Today format=date9.

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 DATE9 format in SAS?

A SAS format is aan instruction that converts the internal numerical value of a SAS variable to a character string that can be printed or displayed. … The format cases shown are the MONYY7. format (for the DATE variable), the DATE9. format (for the DATE1 variable), and no format (for the DATE0 variable).

How do you define a macro in SAS?

Macro variables are referenced by using ampersand (&) followed by macro variable name. We can also declare multiple macro variables and use them at different places in SAS Code. Macro variable are not resolved when they are accessed within single quotes. Hence, we should use double quotes to reference them.

What is call Symputx in SAS?

CALL SYMPUTX uses a field width of up to 32 characters when it converts a numeric second argument to a character value. CALL SYMPUT uses a field width of up to 12 characters. CALL SYMPUTX left-justifies both arguments and trims trailing blanks.

How do you write in SAS?

SAS programs include two types of steps: DATA steps and PROC steps. DATA steps begin with the keyword DATA, and PROC steps begin with the keyword PROC. Generally, a step ends with a RUN statement or when a new DATA or PROC step begins. A RUN statement tells SAS to process all of the preceding lines of the step.

How do I use a macro variable in SAS?

After a macro variable is created, you typically use the variable by referencing it with an ampersand preceding its name (&variable-name), which is called a macro variable reference. These references perform symbolic substitutions when they resolve to their value. You can use these references anywhere in a SAS program.

How do I create a local macro variable in SAS?

Local macro variables are variables that are available only during the execution of the macro in which they are defined. Use the %LOCAL statement to ensure that macro variables created earlier in a program are not inadvertently changed by values assigned to variables with the same name in the current macro.

Do loops SAS macro?

Suppose you need to pass a variable in loop based on the input defined in a macro. %macro report (input=, var = , class=); %let n=%sysfunc(countw(&var));