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Re: InstantDB: Problem with multiple promary Keys


For a two element unique primary key:

CREATE TABLE t2 (
    k1 long,
    k2 char(10),
   data2 char(128) )
  UNIQUE (k1,k2)
  PRIMARY KEY (k1,k2)

You need the UNIQUE because PRIMARY KEY is non-unique in instantdb.
Of course, I don't know if the PRIMARY KEY then adds anything or if a 
second non-unique index structure is created if you have both.

Scott Plante

> -----Original Message-----
> From: sharathbabu Krishnarao [mailto:sharathbabuk1@yahoo.com]
> Sent: Thursday, March 01, 2001 12:30 PM
> To: instantdb@enhydra.org
> Subject: InstantDB: Problem with multiple promary Keys
> 
> 
> I have a table which has 2 primary keys say PK1 & Pk2.
> I want a UNIQUE (PK1 & PK2) combination, with PK1 &
> PK2 non-UNIQUE, how to do this ?
> 
> If i specify UNIQUE to both PK1 & PK2 then in can't
> repeat PK1 or PK2. 
> 
> Is there a way to specify UNIQUE Column combinations
> at a table level ?
> 
> Thanx
> Sharathbabu Krishnarao
> 
> 
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