Date and Time Tutorial April 2008

†„††®Working With SAS SystemDate and Time FunctionsAndrew H. KarpSierra Information Services19229 Sonoma Highway PMB 264Sonoma, California 95476Andrew@SierraInformation.comwww.SierraInformation.com1Thanks!Thanks for attending !Please hold questions until the end of the presentationCopy of these slides as PDF atwww.SierraInformation.comSAS is a registered trademark of SAS Institute in the USA and other countries ® indicates USA registration. This 2document copyright © 2008 by Sierra Information Services. All rights reserved.Copyright © 2008 Sierra Information Services. All rights reserved.SAS is a registered trademark of SAS Institute in the USA and other countries ® indicates USA registration.„††„†Working with SAS System Date and Time FunctionsMany applications require that operations be performed on data collected in the time domain, such as:determining the frequency with which a phenomenon of interest occurs in timeHow many babies were born each day in January 2006?determining the time interval which has elapsedbetween two phenomenaHow many days elapsed between birth and discharge?SAS is a registered trademark of SAS Institute in the USA and other countries ® indicates USA registration. This document copyright © 2008 by Sierra Information Services. All rights reserved. 3Working with SAS System Date and Time Functionsoperating conditionally on observations in a SAS data set based on values of date and/or time variables· ...