Note: To ensure good performance, all statistics are calculated on a sample of the data. For information about calculating statistics on a sample, see Calculating Statistics.
This selection displays the sampling strategy for the selected case table or view.
There are two sampling strategies:
In most cases, random sampling is the best setting for tables or performant views.
If the case data is a view that is not expected to be performant, select Top N. If you select Random in the case of a non-performant view, generating the sample will be very slow. Top N simply picks the first N
items, where N
is the sample size.
You can change Sample Size, that is, the number of rows in the sample. The default sample size is the sample size specified on the Sampling tab in Oracle Data Miner Preferences.
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