A UNIQUE index can have any number of columns, so you can create an index with all of the appropriate columns listed. This is different from having a UNIQUE index on each individual column. In the former case, all of the columns together must be unique; in the latter case, as you mention, each index is evaluated separately. > On Jul 9, 2023, at 15:58, pf@xxxxxxxxxxx wrote: > > Hi, > > Trying to figure out how to insert new property addresses into an > existing table. > > Can a UNIQUE constraint be applied to an entire row? Adding UNIQUE to > each column won't work in such a case since there are multiple properties > * on the same street > * in the same town > * with the same number on different streets > * etc... > > Each row is only unique as an entity; but the columns are not... > > Is this covered in the docs? > > Thanks, > Pierre > > >
