> Hi
>
> I just exported my MS Access databases into postgres using an ODBC driver,
> but the thing is during the export postgres doesn't recognize any of my
> primary keys in Access.
> Is there any way to alter the tables so that i can make one of my current
> fields the primary key? I don't want to drop the column since I already
> have data in the table and i don't want to create/drop tables as some of
> the documentation suggests since most of my tables have 10+ fields.. any
> suggestions??
>
AFAIK, it can be done in any of the below two ways:
1. Create unique index
CREATE UNIQUE INDEX index_name ON table_name USING btree (field1, ..,
fieldn);
2. Add primary key constraint
ALTER TABLE table_name ADD PRIMARY KEY (field1, .., fieldn);
For this to happen, the fields should have unique values.
regards,
bhuvaneswaran
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