What Privilege Is Needed for a User to Insert Rows to Tables in Another Schema?

For a user to insert rows into tables of someone else's schema, he/she needs the INSERT ANY
TABLE privilege. The following tutorial exercise gives you a good example of granting "dev" to
insert rows in "hr" schema:
>.\bin\sqlplus /nolog
SQL> CONNECT DEV/developer
SQL> INSERT INTO hr.jobs
VALUES ('DV.FYI', 'Dev FYI Consultant', 7700, 8800);
ORA-01031: insufficient privileges
SQL> disconnect
SQL> connect SYSTEM/fyicenter
SQL> GRANT INSERT ANY TABLE TO dev;
Grant succeeded.
SQL> disconnect
SQL> CONNECT DEV/developer
SQL> INSERT INTO hr.jobs
VALUES ('DV.FYI', 'Dev FYI Consultant', 7700, 8800);
1 row created.
As you can see, "dev" can insert rows in any schema now. But you should be careful when giving
this privilege to a regular developer.