Re: sql tables
Date: Thu, 11 Oct 2007 21:20:50 -0000
On Oct 11, 12:41 pm, "David Cressey" <cresse..._at_verizon.net> wrote:
> The table header,
> among other things, associates a Column name with a column position. The
> rows containing the data only have data values, one after the other. The
> position of a value in a row and the position of the corresponding column
> name in the header together, establish the linkage between the value and
> the name.
I think it is worthwhile to make a distinction here between syntax and semantics. Taking advantage of positions can be quite useful in syntax, but it seems to raise a lot of complex annoying issues if position is part of the semantics.
Marshall Received on Thu Oct 11 2007 - 23:20:50 CEST