update : 19-08-2017

DBA Script : example_create_not_null_constraints.sql

-- | FILE : example_create_not_null_constraints.sql |
-- +----------------------------------------------------------------------------+
-- | |
-- | |
-- | www.high-oracle.com |
-- |----------------------------------------------------------------------------|
-- | www.high-oracle.com |
-- |----------------------------------------------------------------------------|
-- | DATABASE : Oracle |
-- | FILE : example_create_not_null_constraints.sql |
-- | CLASS : Examples |
-- | PURPOSE : It is important when designing tables to name your NOT NULL |
-- | constraints. The following example provides the syntax necessary|
-- | to name your NOT NULL constraints. |
-- | NOTE : As with any code, ensure to test this script in a development |
-- | environment before attempting to run it in production. |
-- +----------------------------------------------------------------------------+
ALTER TABLE user_names
MODIFY ( name CONSTRAINT user_names_nn1 NOT NULL
, age CONSTRAINT user_names_nn2 NOT NULL
, update_log_date CONSTRAINT user_names_nn3 NOT NULL
)
/

End Script

Oracle Database Error Messages



Oracle Database High Availability Any organization evaluating a database solution for enterprise data must also evaluate the High Availability (HA) capabilities of the database. Data is one of the most critical business assets of an organization. If this data is not available and/or not protected, companies may stand to lose millions of dollars in business downtime as well as negative publicity. Building a highly available data infrastructure is critical to the success of all organizations in today's fast moving economy.

Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.