How to find the largest and the widest tables in Oracle 10g ?

Question

Hi Folks,
Environment: 10g Rel 2
Can somebody please suggest the data dictionary view(s) that I can query to get a list of the longest (rows) and the widest (columns) tables in any schema ?
Thanks in advance
rogers42

Answer 1

rogers42 wrote:
Hi,
Thanks for the replies.
By the "longest" table, I had meant a table with most number of rows. And few people had wisely pointed out the dba_tables view.
By the "widest table", I had meant a table with the most number of columns. Is there a view that can give me this info ?
Thanks
rogers42if your statistics are updated :
SELECT D.OWNER , D.TABLE_NAME
FROM DBA_TABLES D
WHERE D.OWNER NOT IN ('SYSTEM', 'SYS')
ORDER BY D.NUM_ROWS DESC
and try this code, for the second :)
DECLARE
CURSOR cur_tab
IS
SELECT D.OWNER AS OWNER , D.TABLE_NAME AS TABLE_NAME
FROM DBA_TABLES D
W_TABLE VARCHAR2(30);
W_OWNER VARCHAR2(30);
w_count_col NUMBER;
w_col_max NUMBER;
BEGIN
w_count_col := 1;
w_col_max := 1;
W_TABLE := 'TEST';
W_OWNER := 'TEST';
FOR c IN cur_tab LOOP
  SELECT COUNT(*) INTO w_count_col
  FROM DBA_TAB_COLS t
  WHERE t.owner = c.OWNER
  AND t.TABLE_NAME = c.TABLE_NAME
  IF w_count_col >= w_col_max THEN
    w_col_max := w_count_col;
    W_TABLE := c.TABLE_NAME;
    W_OWNER := c.OWNER ;
  END IF;
END LOOP;
dbms_output.put_line(' w_col_max : '||w_col_max) ;
dbms_output.put_line(' W_TABLE: '||W_TABLE) ;
dbms_output.put_line('W_OWNER : '||W_OWNER) ;
END;