Get the count of each table - oracle

Question

I was trying to create a procedure to fetch the total count of rows of all tables corresponding to a schema.
I am proceeding with a cursor which store the total list of tables and and the same is iterate further. Even though the functionality is not tested.The procedure creation compiled with the following errors.
create or replace
PROCEDURE PROC_TABLE_COUNT
AS
table_count NUMBER;
CURSOR total_tables
IS
SELECT table_name FROM dba_tables WHERE owner = 'OWNER_NAME';
BEGIN
FOR i IN total_tables
LOOP
SELECT COUNT (*) INTO table_count FROM dba_tables db where db.table_name = i.table_name;
END LOOP;
END PROC_TABLE_COUNT;
1)Error(7,6): PL/SQL: SQL Statement ignored
2)Error(7,33): PL/SQL: ORA-00942: table or view does not exist
3)Error(11,1): PL/SQL: SQL Statement ignored
4)Error(11,76): PL/SQL: ORA-00904: "I"."TABLE_NAME": invalid identifier
5)Error(11,76): PLS-00364: loop index variable 'I' use is invalid
Question 1:
Is the error 2(at dba_tables) is due to the grant being denied? By right clicking on the procedure name ,I tried to assign the privilege to debug and execute. But still the error persists.
Question 2:
Regarding the invalid identifier. Why is this error coming?
UPDATE:
As per one of the valuable comment I have changed the query and the compile error is gone. Now there is an issue in the logic.
create or replace procedure proc_tab_count as
table_count NUMBER;
CURSOR total_tables
IS
SELECT table_name FROM user_tables;
BEGIN
FOR i IN total_tables
LOOP
SELECT COUNT (*) INTO table_count FROM user_tables WHERE db.table_name = i.table_name; --Wrong logic here
DBMS_OUTPUT.put_line(i.table_name||'-COUNT:'||table_count);
END LOOP;
end proc_tab_count;
output is coming like:
Table1 -COUNT:1
Table2 -COUNT:1
Table3 -COUNT:1
Table3 -COUNT:1
Table4 -COUNT:1
Table5 -COUNT:1

Answer 1

Guess, you want to count rows in all your tables, and we need a dynamic SQL here.
EXCEUTE IMMEDIATE is used to frame the dynamic SQL making the OWNER.TABLE_NAME dynamic.
create or replace procedure proc_tab_count as
table_count NUMBER;
CURSOR total_tables
IS
SELECT table_name FROM user_tables;
BEGIN
FOR i IN total_tables
LOOP
/* Handle Exceptions */
BEGIN
EXECUTE IMMEDIATE 'SELECT COUNT (*) FROM '|| i.table_name INTO table_count;
DBMS_OUTPUT.put_line(i.table_name||'-COUNT:'||table_count);
EXCEPTION WHEN OTHERS
THEN
DBMS_OUTPUT.put_line('Error while Querying '||i.table_name||'-Error:'||SQLERRM);
END;
END LOOP;
end proc_tab_count;

Answer 2

I'm not so sure that the accepted answer works. Does user_tables contain owner? Otherwise, it's spot on.
Anyway. Another approach using SYS_REFCURSOR:
CREATE OR REPLACE PROCEDURE proc_table_count
CURSOR total_tables IS
SELECT table_name
FROM user_tables
ORDER BY table_name;
table_count NUMBER;
v_sql VARCHAR2(100);
v_cursor SYS_REFCURSOR;
BEGIN
FOR i IN total_tables
LOOP
BEGIN
v_sql := 'SELECT COUNT (*) FROM '||i.table_name;
OPEN v_cursor FOR v_sql;
FETCH v_cursor INTO table_count;
CLOSE v_cursor;
DBMS_OUTPUT.put_line(i.table_name||'-COUNT:'||table_count);
EXCEPTION WHEN OTHERS
THEN
DBMS_OUTPUT.put_line('Error while Querying '||i.table_name||'-Error:'||SQLERRM);
END;
END LOOP;
end proc_tab_count;