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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