[SQL] sort order with < & > in varchar fields

[Rolf Johansson]

It is possible to extract rows in a table using
SELECT name FROM table WHERE name >= 'Bergman'.

The problem I have is that I get names like "Berg, Paul"
with this query, and I don't want that.

Is there documentation on how >= and <= works with varchar
fields? Does pg count in the "," character or ignore it?
And so on...

Version is 7.0.1.

/Rolf