| ORA-01668: | standby database requires DROP option for offline of data file | | Cause: | Attempting to take a datafile offline in a standby database without specifying the DROP option. Files that are offline in a standby database are not recovered, and are likely to be unusable if the standby is activated. Note that specifying DROP does not prevent bringing the file online later. | | Action: | Specify the DROP option or leave the file online.
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