Grant Select on all tables in a schema

I encountered this situation where I wanted to grant SELECT on all the tables owned by one user to another user.

There are two simple ways to achieve this

• Generate SQL for each table

• Using simple LOOP statement

Generate SQL for each table

In this method, we will generate GRANT SELECT statement for each table using below query. Here we are trying to GRANT SELECT on each table owned by HR user to SCOTT user

Select 'GRANT SELECT ON HR.'||Table_Name||' TO SCOTT;' 
From All_Tables Where Owner='HR';

Here is the sample output of the above command

Now you can execute individual statements from the above output to GRANT SELECT ON all HR tables to SCOTT user.

Using simple LOOP statement

We can take use of PL/SQL and write a simple loop statement as below to automatically execute the GRANT SELECT statements for us. Again we are trying to GRANT SELECT on every table owned by HR user to SCOTT user

BEGIN
   FOR R IN (SELECT owner, table_name FROM all_tables WHERE owner='HR') LOOP
      EXECUTE IMMEDIATE 'grant select on '||R.owner||'.'||R.table_name||' to SCOTT';
   END LOOP;
END;
/

Here is the sample output of the above command