Select the table for maintaining in the object pane. Right-click and select the Maintain from the popup menu.
Enable / Disable Table Lock
Allows / Prevents DDL operations on the table.
Enable / Disable Row Movement
Allows / Prevents the database to move a row.
Shrink Space
Shrinks space in a table.
Move
Relocates data of a nonpartitioned table or of a partition of a partitioned table into a new segment.
Collect Statistics
Collects table statistics.
Validate Structure
Verifies the integrity of the structure of a table.