Row count of all tables in a schema - oracle

Question

DECLARE
v_owner varchar2(40);
v_table_name varchar2(40);
cursor get_tables is
select distinct table_name
, user
from user_tables
where lower(user) = 'schema_name'
;
BEGIN
OPEN get_tables;
LOOP
FETCH get_tables
INTO v_table_name
, v_owner
;
EXIT WHEN get_tables%NOTFOUND;
EXECUTE IMMEDIATE
'INSERT
INTO STATS_TABLE
( TABLE_NAME
, SCHEMA_NAME
, RECORD_COUNT
, CREATED
)
SELECT '''
|| v_table_name
|| ''' , ''' || v_owner
|| ''' , COUNT(*)
, TO_DATE(SYSDATE,''DD-MON-YY'')
FROM ' || v_table_name
;
END LOOP;
CLOSE get_tables;
END;
I am using this to get row counts of all tables in a schema. I got this query from stackoverflow.
I ran this as a procedure its successfully compiled but i am unable to view the result y is it so?
I am new to pl/sql can anyone explain what does the select statement do after the excute immediate query I am unable to understand the logic behind.

Answer 1

Try this:
select TABLE_NAME, NUM_ROWS from dba_tables where owner = 'xxxxx'

Answer 2

You can simply get row count against tables by:
select owner, table_name, nvl(num_rows,-1)
from all_tables
order by nvl(num_rows,-1) desc
https://livesql.oracle.com/apex/livesql/file/content_EPJLBHYMPOPAGL9PQAV7XH14Q.html

Answer 3

The row counts are inserted into a table name STATS_TABLE. You need to run a
select *
from stats_table
after running the procedure

Answer 4

This procedure is running successfully
DECLARE
v_owner varchar2(40);
v_table_name varchar2(40);
cursor get_tables is
select distinct table_name, user
from user_tables
where lower(user) = 'coreown' ;
BEGIN
OPEN get_tables;
LOOP
FETCH get_tables
INTO v_table_name, v_owner;
EXIT WHEN get_tables%NOTFOUND;
EXECUTE IMMEDIATE 'INSERT
INTO STATS_TABLE
( TABLE_NAME
, SCHEMA_NAME
, RECORD_COUNT
, CREATED
)
SELECT ''' || v_table_name ||
''' , ''' || v_owner || ''' , COUNT(*)
, TO_DATE(SYSDATE,''DD-MON-YY'')
FROM ' || v_table_name;
END LOOP;
CLOSE get_tables;
END;
/
I tried at my end.
After executing USE COMMIT.So that it will save the change is DB.
Then check again.

Answer 5

Well, user_tables does not have a user column, so that query is invalid. Always test the queries in isolation -- you probably want all_tables or dba_tables. Also, do you think you need a DISTINCT on that query?
Use an implicit cursor instead of an explicit one wherever you can -- less code, less error prone in coding, and faster.
Do not store dates as character types -- you just insert sysdate, not a representation of it as a string.
Don't prefix variable names with "v_" -- just namespace them with the procedure or block name.
The Execute Immediate constructs a SQL statement that performs an insert into the stats_table (why does it have the word "table" in the name? That's redundant, surely?)
The query will be constructed as something like:
INSERT INTO STATS_TABLE
( TABLE_NAME
, SCHEMA_NAME
, RECORD_COUNT
, CREATED
)
SELECT 'MY_TABLE_NAME' , 'MY_USERNAME' , COUNT(*) , SYSDATE
FROM MY_TABLE_NAME;