SELECT
B.TABLE_NAME AS "表名",
C.COMMENTS AS "表说明",
B.COLUMN_ID AS "字段序号",
B.COLUMN_NAME AS "字段名",
B.DATA_TYPE AS "字段数据类型",
B.DATA_LENGTH AS "数据长度",
B.DATA_PRECISION AS "整数位",
B.DATA_SCALE AS "小数位",
A.COMMENTS AS "字段说明"
FROM
ALL_COL_COMMENTS A,
ALL_TAB_COLUMNS B,
ALL_TAB_COMMENTS C
WHERE
A.TABLE_NAME IN (SELECT U.TABLE_NAME FROM USER_ALL_TABLES U)
AND A.OWNER = B.OWNER
AND A.TABLE_NAME = B.TABLE_NAME
AND A.COLUMN_NAME = B.COLUMN_NAME
AND C.TABLE_NAME = A.TABLE_NAME
AND C.OWNER = A.OWNER
AND A.OWNER = 'xxx' --用户名(区分大小写)
AND A.TABLE_NAME = 'xxx' --表名(区分大小写)
ORDER BY A.TABLE_NAME, B.COLUMN_ID;
