Joshua D. Drake wrote: > On Mon, 26 Nov 2007 10:28:03 -0800 (PST) > Richard Broersma Jr <rabroersma@xxxxxxxxx> wrote: >> --- On Mon, 11/26/07, Joshua D. Drake <jd@xxxxxxxxxxxxxxxxx> wrote: >>> In "theory" the item that would be a natural key >>> in this instance is the VIN. And you then need to deal with cars that have mismatched Body VIN numbers and Engine VIN numbers? It's not uncommon on older cars or crash damaged cars. ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match