How to create a table with two unique columns

How to create a table with two unique columns. I use the following syntax below and I get the error message such unique or primary key already exists.

create the table COPQ_WORKCELL_GOAL
(
Type_id varchar2 (4) NOT NULL UNIQUE,
Tyle_Location varchar2 (30) NOT NULL UNIQUE,
Type_Description varchar2 (20).
KEY elementary SCHOOL (Type_id)
);

Use 1 or the other column type_id;

create table COPQ_WORKCELL_GOAL
(
  Type_id varchar2(4),
  Tyle_Location varchar2(30) NOT NULL UNIQUE,
  Type_Description varchar2(20),
  PRIMARY KEY (Type_id)
);

Table created
drop table COPQ_WORKCELL_GOAL;

Table dropped
create table COPQ_WORKCELL_GOAL
(
  Type_id varchar2(4) primary key,
  Tyle_Location varchar2(30) NOT NULL UNIQUE,
  Type_Description varchar2(20)
);

Table created

Tags: Database

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