I have a table (usr_t_user_reg) in which I register all the users of the database. Now I want to create a view (usr_v_user_not_reg) which shows me all the users that I haven't registered yet or users ...
If I create a view in Oracle, the column definition's not null characteristic is inherited from the base table: create table tq84_t ( col_1 number, col_2 varchar2(15) not null ); create view ...
I have made a virtual column in Oracle, using the following code. CREATE OR REPLACE function email_address (ID_ varchar2) return varchar2 deterministic as lname varchar2 (256); snumber varchar2 ...