Re: Merge Record in Database(SQL Statement)

Not quite sure what the question is....

Assuming, you would like to normalize the data, I suggest to create 4
tables:

create table gpa (id integer primary key,gpa varchar(32) not null unique);
create table major (id integer primary key,major varchar(32) not null
unique);
create table birthplace (id integer primary key,birthplace varchar(32) not
null unique);
create table xxx (   id integer primary key,   attributename varchar(64) not null,  -- this might be unique too
id_majorinteger references major(id),   id_birthplace integer references birthplace(id),   id_gpa integer references
gpa(id)
);

insert into gpa (id,gpa) values (1,'excellent');
insert into major (id,major) values (1,'science');
insert into birthplace (id,birthplace) 1,'India');

insert into xxx (id,attributename,id_major,id_birthplace,id_gpa) values
(1,'Record 1',1,1,1);
insert into xxx (id,attributename,id_major,id_birthplace,id_gpa) values
(1,'Record 2',1,1,1);

Now selecting the records would be something like:

select x.attributename,m.major,b.birthplace,g.gpa from attributename a,major
m,birthplace b,gpa g
where x.id_major=m.id and x.id_birthplace=b.id and x.id_gpa=g.id


Hope that helps....

Detlef








-----Ursprüngliche Nachricht-----
Von: pgsql-sql-owner@postgresql.org
[mailto:pgsql-sql-owner@postgresql.org]Im Auftrag von Shahbuddin Md Isa
Gesendet: Montag, 7. Juli 2003 03:24
An: pgsql-sql@postgresql.org
Betreff: [SQL] Merge Record in Database(SQL Statement)


Hai..
  How to merge record in database(sql statement) if record same attribute,
examples:-

Attribute      Major   Birth_Place      GPA

Record 1        science  India         excellent
Record 2        science  India         excellent

Please help me..

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