今天有一个把oracle中的表结构及其说明导入到Excel的需求，如果使用PLSQL的导出对象，则不符合导出excel的要求。并且，如果导出每个表，是要花费时间的。
通过在网上一通搜索，加上修改，完成了以上工作，先记录如下：
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 = 'PYE'
ORDER BY A.TABLE_NAME, B.COLUMN_ID;
另外一些辅助查询：
SELECT * FROM ALL_USERS WHERE USERNAME='PYE'; --查询用户
SELECT * from user_tables where table_name like '%TJ%'; --模糊查询表明
select owner from dba_tables where table_name='TJ_T_TJTCDJB'; --查询表拥有者
注：有需要的，欢迎转载