DESC sys.user_summary_by_file_io_type;
Field	Type	Null	Key	Default	Extra
user	varchar(32)	YES		NULL
event_name	varchar(128)	NO		NULL
total	bigint(20) unsigned	NO		NULL
latency	text	YES		NULL
max_latency	text	YES		NULL
SELECT * FROM sys.user_summary_by_file_io_type;
DESC sys.x$user_summary_by_file_io_type;
Field	Type	Null	Key	Default	Extra
user	varchar(32)	YES		NULL
event_name	varchar(128)	NO		NULL
total	bigint(20) unsigned	NO		NULL
latency	bigint(20) unsigned	NO		NULL
max_latency	bigint(20) unsigned	NO		NULL
SELECT * FROM sys.x$user_summary_by_file_io_type;
