How to update a column

Question

Hi Everyone,
I have this table
INPUT TABLE
name description code
ACCOMMODATION - HOTELS
RESTAURANTS - CHINESE
RESTAURANTS - INDIAN
RESTAURANTS - GREEK
GREEK 1
INDIAN 2
CHINESE 3
HOTELS 4
REQUIRED OUTPUT TABLE
name description code
ACCOMMODATION - HOTELS 4
RESTAURANTS - CHINESE 3
RESTAURANTS - INDIAN 2
RESTAURANTS - GREEK 1
GREEK 1
INDIAN 2
CHINESE 3
HOTELS 4
THANKS

Answer 1

I'm am also a little confused about what you are asking for here. Is this it?
create table yourtable
name_description varchar2(25),
code number
insert into yourtable values ('ACCOMMODATION - HOTELS',null);
insert into yourtable values ('RESTAURANTS - CHINESE',null);
insert into yourtable values ('RESTAURANTS - INDIAN',null);
insert into yourtable values ('RESTAURANTS - GREEK',null);
insert into yourtable values ('GREEK',1);
insert into yourtable values ('INDIAN',2);
insert into yourtable values ('CHINESE',3);
insert into yourtable values ('HOTELS',4);
commit;
UPDATE yourtable a
SET    code =
        SELECT code
        FROM   yourtable b
        WHERE  code IS NOT NULL
        AND    INSTR(a.name_description,b.name_description) > 1
WHERE  code IS NULL;
NAME_DESCRIPTION                CODE
ACCOMMODATION - HOTELS             4
RESTAURANTS - CHINESE              3
RESTAURANTS - INDIAN               2
RESTAURANTS - GREEK                1
GREEK                              1
INDIAN                             2
CHINESE                            3
HOTELS                             4Greg Pike
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