How do the SQL “IS” and “=” operators differ?

Question

I am building some prepared statements that use parametrized values. As an example:

SELECT * FROM \"Foo\" WHERE \"Bar\"=@param

Sometimes

Answer 1

I don't know what version of SQL you are using but IS makes no sense in the context you just described. I get a syntax error if I try to use it the way you described. Why would you want to use it over = anyway? This is the common usage and the one software maintainers woudl expect to find.