All of the following data dictionary tables have a LAST_ANALYZED column (replace * with USER/ALL/DBA as appropriate:
*_TABLES *_TAB_PARTITIONS *_TAB_SUBPARTITIONS *_INDEXES *_IND_PARTITIONS *_IND_SUBPARTITIONS
(There‘s lots more in the histograms fields,but I‘m not going that deep.)
Conversely, ALL_TAB_MODIFICATIONS
shows rows inserted/updated/deleted (or the timestamp on which a table/partition/subpartition was truncated) since it had optimizer statistics gathered.
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