How is a date value stored in SAS?
SAS dates are stored as simple integer numbers. SAS time/datetimes are stored as decimal numbers to include 10th and 100th of seconds. For time values the integer part is the number of seconds from midnight. For datetime the integer part equals the number of seconds from January 1,1960.
What is the data type of date in SAS?
IN SAS dates are a special case of numeric values. Each day is assigned a specific numeric value starting from 1st January 1960. This date is assigned the date value 0 and the next date has a date value of 1 and so on. The previous days to this date are represented by -1 , -2 and so on.
How do I code a date range in SAS?
To write a SAS date constant (in IF or WHERE statements for example), enclose a date in quotation marks in the standard SAS form ddMMMyyyy and immediately follow the final quotation mark with the letter D. The D suffix tells SAS to convert the calendar date to a SAS date value.
How do I create a date in SAS?
A SAS date can be created using the MDY function so that you supply the values for the month, day, and year values. data one; input month day year; datalines; 1 1 99 02 02 2000 ; /* Use the MDY function along with variables representing the month, day, */ /* and year values to create a SAS date.
How do I input a date variable in SAS?
Example 1: Using the YYMMDD8. (e.g., 19970425 for April 15, 1997) can be converted to a SAS date variable by using the YYMMDD8. informat in the Data Step. Using this informat ‘converts’ the values of the variable to SAS date values. Other informats include DDMMYY8. , MMDDYY8.
Can SAS date values be negative?
While SAS can include negative number dates (before the zero point), Excel cannot. Therefore, a date prior to January 1, 1900 will be a missing date value unless this field is stored as a character variable.