> adding a column to a table might accidentally break existing queries Just a column, no. Adding a new foreign key might, but that's something that a type-chec

> adding a column to a table might accidentally break existing queries Just a column, no. Adding a new foreign key might, but that's something that a type-checker/compiler can let you know about. > They should Use NATURAL JOIN NATURAL JOINs are better than nothing, but they're flawed too. Column names are supposed to convey meaning or intention, not just the type of data that they contain.