Billy Donahue wrote:
>Joao Paulo Felix wrote:
>>
>> Hi there,
>>
>> I am having trouble trying to alter a class and update an column
>> constraint to PRIMARY KEY. I decided to create a new table using the
>> following, still it does seem work:
>>
>> CREATE TABLE my_table
>>
>> (my_column INT PRIMARY KEY, my_column2 TEXT);
>>
>> Could any one help me please. Thanks in advance.
>>
>> Joao Paulo
>
>I'm new to this myself, but I know there's no
>PRIMARY KEY in the SQL subset supported by PostgreSQL.
Your information is out of date. 6.3.2 does support the PRIMARY KEY
constraint. Here are two examples that work:
create table price
(
product char(8) primary key
references product (id),
unit text default 'each',
cost money not null,
home money not null,
export money not null,
next_home money,
next_export money
)
;
create table batch_issues
(
product char(8) not null
references product (id),
batch int not null,
stamp datetime not null
default datetime(now()),
type char(1) not null,
ref char(5),
qty int not null,
primary key (product, batch, stamp),
foreign key (product, batch) references batch
);
[the foreign key bits are parsed but have no effect, in 6.3.2]
--
Oliver Elphick Oliver.Elphick@lfix.co.uk
Isle of Wight http://www.lfix.co.uk/oliver
PGP key from public servers; key ID 32B8FAA1
========================================
"Let no man despise thy youth; but be thou an example
of the believers, in word, in conversation, in
charity, in spirit, in faith, in purity."
I Timothy 4:12
