Home > Using the Data Miner GUI > Oracle Data Miner Functiona... > View Menu > Tools Menu > Data Miner Preferences > Sampling
Select the default way to perform sampling.
Sampling Type: either Random or Top N. For Random, there is a default seed of 12,345; you can change the seed.
Sample Size: specify either a number of rows or a percent for the sample size. The default is either 2,000 rows or 60%.