USER_TAB_COLUMNS

Name	Null?	Type	Value
TABLE_NAME	NOT NULL	VARCHAR2(30)
COLUMN_NAME	NOT NULL	VARCHAR2(30)
DATA_TYPE		VARCHAR2(106)
DATA_TYPE_MOD		VARCHAR2(3)	NULL
DATA_TYPE_OWNER		VARCHAR2(30)	NULL
DATA_LENGTH	NOT NULL	NUMBER
DATA_PRECISION		NUMBER
DATA_SCALE		NUMBER
NULLABLE		VARCHAR2(1)	"Y" or "N"
COLUMN_ID	NOT NULL	NUMBER
DEFAULT_LENGTH		NUMBER	NULL
DATA_DEFAULT		LONG	NULL
NUM_DISTINCT		NUMBER	NULL
LOW_VALUE		RAW(32)	NULL
HIGH_VALUE		RAW(32)	NULL
DENSITY		NUMBER	0
NUM_NULLS		NUMBER	0
NUM_BUCKETS		NUMBER	0
LAST_ANALYZED		DATE	NULL
SAMPLE_SIZE		NUMBER	0
CHARACTER_SET_NAME		VARCHAR2(44)	NULL
CHAR_COL_DECL_LENGTH		NUMBER	0
GLOBAL_STATS		VARCHAR2(3)	NULL
USER_STATS		VARCHAR2(3)	NULL
AVG_COL_LEN		NUMBER	0