http://docs.oracle.com/cd/B28359_01/server.111/b28320/statviews_1036.htm ALL_COL_COMMENTSALL_COL_COMMENTS displays comments on the columns of the tables and views accessible to the current user. Related Views DBA_COL_COMMENTS displays comments on the columns of all tables and views in the database. USER_COL_COMMENTS displays comments on the columns of the tables and views owned by the current us..

SQL> desc v$rollstat Name Null? Type ------------------------- -------- ------------ USN NUMBER LATCH NUMBER EXTENTS NUMBER RSSIZE NUMBER WRITES NUMBER XACTS NUMBER GETS NUMBER WAITS NUMBER OPTSIZE NUMBER HWMSIZE NUMBER SHRINKS NUMBER WRAPS NUMBER EXTENDS NUMBER AVESHRINK NUMBER AVEACTIVE NUMBER STATUS VARCHAR2(15) CUREXT NUMBER CURBLK NUMBER EXTENTS : ROLLBACK SEGMENT의 EXTENT의 개수 RSSIZE : ROLLB..

desc v$session