SQL> select constraint_name,constraint_type,table_name
  2  from user_constraints
  3  where table_name = '&table_name';

SQL> select constraint_name, constraint_type,table_name
  2  from user_constraints
  3  where table_name = 'TEST';

CONSTRAINT_NAME                C TABLE_NAME
------------------------------ - ------------------------------
PK_ID                          P TEST
UK_PHONE                       U TEST
CK_SALARY                      C TEST
SYS_C005016                    C TEST
FK_NO                          R TEST

Constraint type
Primary key >>> P
Foreign key >>> R
Check       >>> C
Unique      >>> U
Not null    >>> C ( with system generate name)

21:08:08 ORCL> set pages 0
21:12:29 ORCL> set long 99999 -- it could be a large table :-)
21:13:06 ORCL> select dbms_metadata.get_ddl('TABLE','D') from dual;
 
  CREATE TABLE "CRB"."D"
   (    "NAVN" VARCHAR2(20) NOT NULL ENABLE
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
  TABLESPACE "USERS"
 
 
 
Elapsed: 00:00:00.96
21:13:34 ORCL>