用这样的命令 ?? index比如SQL> ? show; SHOW ---- Shows the value of a SQL*Plus system variable, or the current SQL*Plus environment. SHOW SGA requires a DBA privileged login. SHO[W] option where option represents one of the following terms or clauses: system_variable ALL BTI[TLE] ERR[ORS] [{FUNCTION | PROCEDURE | PACKAGE | PACKAGE BODY | TRIGGER | VIEW | TYPE | TYPE BODY | DIMENSION | JAVA CLASS} [schema.]name] LNO PARAMETERS [parameter_name] PNO RECYC[LEBIN] [original_name] REL[EASE] REPF[OOTER] REPH[EADER] SGA SPOO[L] SQLCODE TT[ITLE] USER SHOW SPOOL is not available in iSQL*Plus
?? index比如SQL> ? show; SHOW
---- Shows the value of a SQL*Plus system variable, or the current
SQL*Plus environment. SHOW SGA requires a DBA privileged login. SHO[W] option where option represents one of the following terms or clauses:
system_variable
ALL
BTI[TLE]
ERR[ORS] [{FUNCTION | PROCEDURE | PACKAGE | PACKAGE BODY | TRIGGER
| VIEW | TYPE | TYPE BODY | DIMENSION | JAVA CLASS} [schema.]name]
LNO
PARAMETERS [parameter_name]
PNO
RECYC[LEBIN] [original_name]
REL[EASE]
REPF[OOTER]
REPH[EADER]
SGA
SPOO[L]
SQLCODE
TT[ITLE]
USER SHOW SPOOL is not available in iSQL*Plus
http://blog.csdn.net/inthirties/archive/2009/09/13/4547442.aspx