Oracle
1Z0-082 · Question #66
Which three statements are true about dropping and unused columns in an Oracle database? (Choose three.)
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Manage Schema Objects
Question
Which three statements are true about dropping and unused columns in an Oracle database? (Choose three.)
Options
- AA primary key column referenced by another column as a foreign key can be dropped if using the
- BAn UNUSED column's space is reclaimed automatically when the block containing that column is
- CAn UNUSED column's space is reclaimed automatically when the row containing that column is
- DPartition key columns cannot be dropped.
- EA DROP COLUMN command can be rolled back
- FA column that is set to UNUSED still counts towards the limit of 1000 columns per table
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Topics
#DROP COLUMN#UNUSED columns#column limit#partition key columns