请问如何从View里获得各个Column的Schema?

Question

查询Oracle的数据字典表
      sSQL:= 'SELECT OWNER,TABLE_NAME,COLUMN_NAME,DATA_TYPE,DATA_TYPE_MOD'
           + ',DATA_TYPE_OWNER,DATA_LENGTH,DATA_PRECISION,DATA_SCALE,NULLABLE'
           + ',COLUMN_ID,DEFAULT_LENGTH,DATA_DEFAULT,NUM_DISTINCT,LOW_VALUE'
           + ',HIGH_VALUE,DENSITY,NUM_NULLS,NUM_BUCKETS,LAST_ANALYZED'
           + ',SAMPLE_SIZE,CHARACTER_SET_NAME,CHAR_COL_DECL_LENGTH,GLOBAL_STATS'
           + ',USER_STATS,AVG_COL_LEN'
           + ' FROM ALL_TAB_COLUMNS'
           + ' WHERE OWNER=''' + UpperCase(Trim(cbUsers.Text)) + ''''
           + ' AND TABLE_NAME=''' + UpperCase(lvViews.Selected.Caption) + ''''
           + ' ORDER BY COLUMN_ID';