SHOW -- Shows run-time parameters for session
SHOW keyword
SHOW will display the current setting of a run-time parameter during a session.
These variables can be set using the SET statement, and can be restored to the default values using the RESET statement. Parameters and values are case-insensitive.
See also SET and RESET to manipulate variable values.
Show the current DateStyle setting:
SHOW DateStyle;
NOTICE: DateStyle is ISO with US (NonEuropean) conventions
Show the current genetic optimizer (geqo) setting:
SHOW GEQO;
NOTICE: GEQO is ON beginning with 11 relations
There is no SHOW defined in SQL92.