SELECT A.COLUMN_NAME 字段名,

        DATA_TYPE ||DECODE(DATA_TYPE,'DATE','','CLOB','','BLOB','','BFILE','','FLOAT','','LONG RAW','','LONG','','RAW','(' || TO_CHAR(DATA_LENGTH) || ')',

 

               (DECODE(SIGN(INSTR(DATA_TYPE, 'CHAR')),1,

                 '(' || TO_CHAR(DATA_LENGTH) || ')',(DECODE(SUBSTR(DATA_TYPE, 1, 9),

                  'TIMESTAMP', '',

                 (DECODE(NVL(DATA_PRECISION, -1), -1,

                  '',(DECODE(NVL(DATA_SCALE, 0), 0,

                  '(' || TO_CHAR(DATA_PRECISION) || ')', '(' || TO_CHAR(DATA_PRECISION) || ',' ||

                 TO_CHAR(DATA_SCALE) || ')'))))))))) 字段类型,

        A.NULLABLE 允许为空,

        A.DATA_DEFAULT 默认值,

        B.COMMENTS 字段注释

   FROM ALL_TAB_COLUMNS A,

        ALL_COL_COMMENTS B

  WHERE B.TABLE_NAME=A.TABLE_NAME

  AND A.OWNER=B.OWNER

  AND A.COLUMN_NAME=B.COLUMN_NAME

  AND A.TABLE_NAME =UPPER( 'TABLE_NAME')

    AND A.OWNER =UPPER( 'USER')

  ORDER BY COLUMN_ID;