Oracle 21c

By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
CREATE TABLE domains( 
                     id          INT, 
                     name        VARCHAR2(50), 
                     code        VARCHAR2(50), 
                     description VARCHAR2(50)
                    )
INSERT INTO domains VALUES(1,'Domain A','D.A.','This is Domain A')
1 rows affected

MERGE INTO domains A USING 
     (SELECT 2 id, 'Domain A' name, 'D.A.' code, 'This is Domain A' description 
        FROM domains) b
          ON ( a.name = b.name )
        WHEN NOT MATCHED THEN INSERT( a.id, a.name, a.code, a.description ) 
                              VALUES( b.id, b.name, b.code, b.description )
SELECT * FROM domains


ID
NAME
CODE
DESCRIPTION


1
Domain A
D.A.
This is Domain A


DELETE domains
1 rows affected

INSERT INTO domains VALUES(1,'Domain A','D.A.','This is Domain A')
1 rows affected

MERGE INTO domains A USING 
     (SELECT 2 id, 'Domain B' name, 'D.B.' code, 'This is Domain B' description 
        FROM domains) b
          ON ( a.name = b.name )
        WHEN NOT MATCHED THEN INSERT( a.id, a.name, a.code, a.description ) 
                              VALUES( b.id, b.name, b.code, b.description )
1 rows affected

SELECT * FROM domains


ID
NAME
CODE
DESCRIPTION


1
Domain A
D.A.
This is Domain A

2
Domain B
D.B.
This is Domain B


DELETE domains
2 rows affected

INSERT INTO domains values(1,'Domain A','D.A.','This is Domain A')
1 rows affected

MERGE INTO domains A USING 
     (SELECT 2 id, 'Domain A' name, 'D.A.' code, 'This is Domain A' description 
        FROM domains) b
          ON ( a.name = b.name )
        WHEN MATCHED THEN UPDATE SET a.id = b.id  -- If you wanted to change for the matching case
        WHEN NOT MATCHED THEN INSERT( a.id, a.name, a.code, a.description ) 
                              VALUES( b.id, b.name, b.code, b.description )
1 rows affected

SELECT * FROM domains


ID
NAME
CODE
DESCRIPTION


2
Domain A
D.A.
This is Domain A