Question

I have a table in PostgreSQL where the schema looks like this:

CREATE TABLE "foo_table" (     "id" serial NOT NULL PRIMARY KEY,     "permalink" varchar(200) NOT NULL,     "text" varchar(512) NOT NULL,     "timestamp" timestamp with time zone NOT NULL ) 

Now I want to make the permalink unique across the table by ALTER-ing the table.

Answer 1

I figured it out from the PostgreSQL docs, the exact syntax is:

ALTER TABLE the_table ADD CONSTRAINT constraint_name UNIQUE (thecolumn); 

Thanks Fred.