1、先查询出用户下的所有表：
SELECT
C.COMMENTS AS "中文表名",
B.TABLE_NAME AS "英文表名",
A.COMMENTS AS "中文字段",
B.COLUMN_NAME AS "英文字段",
B.DATA_TYPE AS "数据类型",
B.NULLABLE AS "是否为空"
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 = 'USE' --（用户名要和自己的对应）
ORDER BY A.TABLE_NAME, B.COLUMN_ID;
2、把查询出的结果导出来，点一下获取最后一页，选中所有数据，右键，导出，CVN格式。
