oracle

hi
could u please tell me when we create a table in oracle and if table is already exists then what type of error should it displayed,? actualy i want exactly error message..

Usually, if we refer to tables, we mean heap tables, although there are other types as well.
A heap table is created like this:
create table t (
  a number,
  b varchar2(10)
)

It is possible to create the constraints together with the create statement. As a foreign key references a known type, it is not necessary to specify the foreign key's column type.
create table orders (
  order_id   number primary key
  order_dt   date,
  cust_id    references customers
)




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