oracle查询所有所有的表结构及字段描述等信息并plsql保存查询结果

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   

   group by B.COLUMN_NAME,C.COMMENTS,  B.TABLE_NAME,A.COMMENTS  

ORDER BY   B.TABLE_NAME,A.COMMENTS 

其中group by 去除重复

plsql将查询结果,选中右键--->save results--->所有文件,xxx.txt  

其中查询的列自定义

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