SAS IT Resource Management
provides a set of macros that enable you to control whether duplicate
data is processed into the IT data mart. In this context, duplicate
data is defined as data whose datetime stamp is within a range of
data that has already been processed into the IT data mart for that
machine or system.
Each of the duplicate-data-checking
macros performs a specific task. Together, these macros set up and
manage duplicate-data checking. The main purpose of the macros is
to check your data and to prevent duplicate data from being processed
into the IT data mart. However, sometimes it is necessary to process
data in a datetime range for which a machine's or system's data was
already processed. For example, you might need to process data into
a table that you did not use earlier or a table that you accidentally
deleted. You can specify that the data is to be accepted even though
it appears to be duplicate data.
This appendix describes
how to set up duplicate-data checking for your type of data. First,
this appendix includes a continuation of the overview and a brief
introduction to the components in duplicate-data checking. Then, this
appendix includes a separate set of instructions for implementing
duplicate-data checking for each type of data.