1、先查詢出用戶下的所有表：
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 "數據類型",
B.NULLABLE AS "是否為空"

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' --（用戶名要和自己的對應）
ORDER BY A.TABLE_NAME, B.COLUMN_ID;
2、把查詢出的結果導出來，點一下獲取最后一頁，選中所有數據，右鍵，導出，CVN格式。