the table structure

How to copy the table structure in oracle without constraints?

Some constraints are copied in whole;

create table w (order_type varchar2(1));
insert into w values ('N');
insert into w values ('C');
insert into w values ('D');
insert into w values ('X');

alter table w add constraint pk_w primary key (order_type);

create table t (x number, order_type varchar2(1) constraint t_fk references w (order_type) );

insert into t values (1, 'X');

commit;

create table t2 as (select * from t where rownum < 1);

  1  select table_name, constraint_name from all_constraints
  2* where table_name in ('T', 'T2')
SQL>
SQL> /

TABLE_NAME                     CONSTRAINT_NAME
------------------------------ ------------------------------
T                              T_FK

Tags: Database

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