Get records count of all tables

Question

Hi ,
I am trying to get the record count of all tables using dynamic query. I don't know how to put the value in placeholder. I tried the below code.
SET SERVEROUTPUT ON SIZE 1000000
DECLARE
     CURSOR table_list
     IS
     select OBJECT_NAME from user_objects
     where object_type in ('TABLE')
     and object_name not like '%AUDIT_DDL%'
     AND object_name not like 'MD_%'
     AND object_name not like 'EXT_%'
     AND object_name not like 'STG_%'
     AND object_name not like 'SYS_%'
     AND object_name not like 'TMP_%'
     AND object_name not like 'TEMP_%'
     order by 1;
     v_count     NUMBER :=0;
     query_str VARCHAR2(1000);
BEGIN
     FOR table_name IN table_list
     LOOP
          query_str :='SELECT COUNT(1) FROM  ' || table_name.OBJECT_NAME;
dbms_output.put_line(query_str);
          dbms_output.put_line('Table Name:' || table_name.OBJECT_NAME );
          v_count:= execute immediate query_str;
          dbms_output.put_line('Table Name:' || table_name.OBJECT_NAME || ', Count ' || v_count );
     END LOOP;
END;
I know I am doing wrong in the bold lines. But not sure how to fix it. Please help. Thanks in advance.

Answer 1

Hi,
Welcome to the forum!
What you posted is basically right, assuming you really want to do dynamic SQL t all.
The only problem with
961618 wrote:
          query_str :='SELECT COUNT(1) FROM  ' || table_name.OBJECT_NAME; would be if the object name included special characters (such as single-quotes) or lower-case letters. To avoid any possible problems, I would put the object name inside double-quotes:
...     query_str := 'SELECT COUNT (*) FROM "' || table_name.OBJECT_NAME
                                           || '"';
          v_count:= execute immediate query_str;
The correct syntax is
execute immediate query_str INTO v_count;V_count will be the number of rows in a single table. Keep another variable (say total_v_count) that keeps the total count so far.
Do you really need dynamic SQL?
SELECT     SUM (num_rows)     AS total_rows
FROM     user_tables
WHERE     table_name     NOT_LIKE '%AUDIT_DDL%
AND     ...
;gets the same information, accurate as of the last time statistics were gathered, and some of the numbers may be approximate. Depending on how you use the results, that may be good enough for you. If you actually have 10,000,123 rows, and the query says you have 10,000,000, does it really matter?